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Iritani B, Tiberi E, Skomorowski W, Moszynski R, Borkowski M, Zelevinsky T. Accurate Determination of Blackbody Radiation Shifts in a Strontium Molecular Lattice Clock. Phys Rev Lett 2023; 131:263201. [PMID: 38215384 DOI: 10.1103/physrevlett.131.263201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 11/20/2023] [Indexed: 01/14/2024]
Abstract
Molecular lattice clocks enable the search for new physics, such as fifth forces or temporal variations of fundamental constants, in a manner complementary to atomic clocks. Blackbody radiation (BBR) is a major contributor to the systematic error budget of conventional atomic clocks and is notoriously difficult to characterize and control. Here, we combine infrared Stark-shift spectroscopy in a molecular lattice clock and modern quantum chemistry methods to characterize the polarizabilities of the Sr_{2} molecule from dc to infrared. Using this description, we determine the static and dynamic blackbody radiation shifts for all possible vibrational clock transitions to the 10^{-16} level. This constitutes an important step toward millihertz-level molecular spectroscopy in Sr_{2} and provides a framework for evaluating BBR shifts in other homonuclear molecules.
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Affiliation(s)
- B Iritani
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - E Tiberi
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - W Skomorowski
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - M Borkowski
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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2
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Tucholska AM, Lesiuk M, Moszynski R. Spin–orbit coupling matrix elements from the explicitly connected expressions of the response functions within the coupled-cluster theory. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2029965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - M. Lesiuk
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - R. Moszynski
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
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3
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Belsa B, Amini K, Liu X, Sanchez A, Steinle T, Steinmetzer J, Le AT, Moshammer R, Pfeifer T, Ullrich J, Moszynski R, Lin CD, Gräfe S, Biegert J. Erratum: Publisher's Note: "Laser-induced electron diffraction of the ultrafast umbrella motion in ammonia" [Struct. Dyn. 8, 014301 (2021)]. Struct Dyn 2021; 8:049901. [PMID: 34497865 PMCID: PMC8410134 DOI: 10.1063/4.0000117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Indexed: 06/13/2023]
Abstract
[This corrects the article DOI: 10.1063/4.0000046.].
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Affiliation(s)
- B. Belsa
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | | | - X. Liu
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - A. Sanchez
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - T. Steinle
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - J. Steinmetzer
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - A. T. Le
- Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
| | - R. Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T. Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | | | - R. Moszynski
- Department of Chemistry, University of Warsaw, 02-093 Warsaw, Poland
| | - C. D. Lin
- Department of Physics, J. R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506-2604, USA
| | - S. Gräfe
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - J. Biegert
- Author to whom correspondence should be addressed:
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4
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Bormotova EA, Kozlov SV, Pazyuk EA, Stolyarov AV, Majewska I, Moszynski R. Theoretical study of the Coriolis effect in LiNa, LiK, and LiRb molecules. Phys Chem Chem Phys 2021; 23:5187-5198. [PMID: 33624674 DOI: 10.1039/d0cp06487d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-adiabatic electronic matrix elements, LΠΣ(R), that arise from the spin-conserving electron-rotational interactions between all mΣ+ and mΠ states, where multiplicity m = 1, 3, converging to the lowest three dissociation limits of Li-containing alkali diatomics, LiM (M = Na, K, Rb), were calculated ab initio up to large internuclear distances, R. The required electronic wavefunctions were obtained within the framework of the multi-reference configuration interaction treatment of the two-valence-electron problem constructed using small-core scalar-relativistic effective core potentials and l-independent core-polarization potentials. A least squares analysis of the ab initio functions at large internuclear distances in conjunction with long-range perturbation theory (LRPT) revealed three different asymptotic behaviors of the LΠΣ(R → +∞)-functions: const. + β[n]/Rn, characterized by n = -1, 3 and 6. The asymptotic coefficients β[n], extracted from the point-wise ab initio data, were found to be in agreement with their LRPT counterparts, which were evaluated analytically using the relevant atomic parameters. The mass dependence of the LΠΣ matrix elements was investigated analytically and numerically. To confirm the reliability of the LΠΣ(R)-functions and interatomic potentials at small and intermediate distances, the empirical q-factors available for the D1Π-states of all LiM molecules studied were compared with their theoretical counterparts derived from the present ab initio data.
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Affiliation(s)
- E A Bormotova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1/3, 119991, Moscow, Russia.
| | - S V Kozlov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1/3, 119991, Moscow, Russia.
| | - E A Pazyuk
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1/3, 119991, Moscow, Russia.
| | - A V Stolyarov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1/3, 119991, Moscow, Russia.
| | - I Majewska
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
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5
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Belsa B, Amini K, Liu X, Sanchez A, Steinle T, Steinmetzer J, Le AT, Moshammer R, Pfeifer T, Ullrich J, Moszynski R, Lin CD, Gräfe S, Biegert J. Laser-induced electron diffraction of the ultrafast umbrella motion in ammonia. Struct Dyn 2021; 8:014301. [PMID: 34026922 PMCID: PMC8121549 DOI: 10.1063/4.0000046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/25/2020] [Indexed: 06/12/2023]
Abstract
Visualizing molecular transformations in real-time requires a structural retrieval method with Ångström spatial and femtosecond temporal atomic resolution. Imaging of hydrogen-containing molecules additionally requires an imaging method sensitive to the atomic positions of hydrogen nuclei, with most methods possessing relatively low sensitivity to hydrogen scattering. Laser-induced electron diffraction (LIED) is a table-top technique that can image ultrafast structural changes of gas-phase polyatomic molecules with sub-Ångström and femtosecond spatiotemporal resolution together with relatively high sensitivity to hydrogen scattering. Here, we image the umbrella motion of an isolated ammonia molecule (NH3) following its strong-field ionization. Upon ionization of a neutral ammonia molecule, the ammonia cation (NH3 +) undergoes an ultrafast geometrical transformation from a pyramidal ( Φ HNH = 107 ° ) to planar ( Φ HNH = 120 ° ) structure in approximately 8 femtoseconds. Using LIED, we retrieve a near-planar ( Φ HNH = 117 ± 5 ° ) field-dressed NH3 + molecular structure 7.8 - 9.8 femtoseconds after ionization. Our measured field-dressed NH3 + structure is in excellent agreement with our calculated equilibrium field-dressed structure using quantum chemical ab initio calculations.
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Affiliation(s)
- B. Belsa
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | | | - X. Liu
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - A. Sanchez
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - T. Steinle
- ICFO—Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - J. Steinmetzer
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - A. T. Le
- Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
| | - R. Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T. Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | | | - R. Moszynski
- Department of Chemistry, University of Warsaw, 02-093 Warsaw, Poland
| | - C. D. Lin
- Department of Physics, J. R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506-2604, USA
| | - S. Gräfe
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - J. Biegert
- Author to whom correspondence should be addressed:
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6
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Leung KH, Majewska I, Bekker H, Lee CH, Tiberi E, Kondov SS, Moszynski R, Zelevinsky T. Transition Strength Measurements to Guide Magic Wavelength Selection in Optically Trapped Molecules. Phys Rev Lett 2020; 125:153001. [PMID: 33095629 DOI: 10.1103/physrevlett.125.153001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Optical trapping of molecules with long coherence times is crucial for many protocols in quantum information and metrology. However, the factors that limit the lifetimes of the trapped molecules remain elusive and require improved understanding of the underlying molecular structure. Here we show that measurements of vibronic line strengths in weakly and deeply bound ^{88}Sr_{2} molecules, combined with ab initio calculations, allow for unambiguous identification of vibrational quantum numbers. This, in turn, enables the construction of refined excited potential energy curves, informing the selection of magic wavelengths that facilitate long vibrational coherence. We demonstrate Rabi oscillations between far-separated vibrational states that persist for nearly 100 ms.
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Affiliation(s)
- K H Leung
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - I Majewska
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - H Bekker
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - C-H Lee
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - E Tiberi
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - S S Kondov
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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7
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Kondov SS, Lee CH, McDonald M, McGuyer BH, Majewska I, Moszynski R, Zelevinsky T. Crossover from the Ultracold to the Quasiclassical Regime in State-Selected Photodissociation. Phys Rev Lett 2018; 121:143401. [PMID: 30339457 DOI: 10.1103/physrevlett.121.143401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Processes that break molecular bonds are typically observed with molecules occupying a mixture of quantum states and successfully described with quasiclassical models, while a few studies have explored the distinctly quantum mechanical low-energy regime. Here, we use photodissociation of diatomic strontium molecules to demonstrate the crossover from the ultracold, quantum regime where photofragment angular distributions strongly depend on the kinetic energy to the quasiclassical regime. Using time-of-flight imaging for photodissociation channels with millikelvin reaction barriers, we explore photofragment energies in the 0.1-300 mK range experimentally and up to 3 K theoretically, and discuss the energy scale at which the crossover occurs. We find that the effects of quantum statistics can persist to high photodissociation energies.
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Affiliation(s)
- S S Kondov
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - C-H Lee
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - M McDonald
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - B H McGuyer
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - I Majewska
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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8
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McDonald M, Majewska I, Lee CH, Kondov SS, McGuyer BH, Moszynski R, Zelevinsky T. Control of Ultracold Photodissociation with Magnetic Fields. Phys Rev Lett 2018; 120:033201. [PMID: 29400515 DOI: 10.1103/physrevlett.120.033201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Indexed: 06/07/2023]
Abstract
Photodissociation of a molecule produces a spatial distribution of photofragments determined by the molecular structure and the characteristics of the dissociating light. Performing this basic reaction at ultracold temperatures allows its quantum mechanical features to dominate. In this regime, weak applied fields can be used to control the reaction. Here, we photodissociate ultracold diatomic strontium in magnetic fields below 10 G and observe striking changes in photofragment angular distributions. The observations are in excellent agreement with a multichannel quantum chemistry model that includes nonadiabatic effects and predicts strong mixing of partial waves in the photofragment energy continuum. The experiment is enabled by precise quantum-state control of the molecules.
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Affiliation(s)
- M McDonald
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - I Majewska
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - C-H Lee
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - S S Kondov
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - B H McGuyer
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - R Moszynski
- Quantum Chemistry Laboratory, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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9
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Moszynski R, Szubert S, Tomczak D, Saad A, Samulak D, Sajdak S, Szpurek D. Solitary fibrous mass of the omentum mimicking an ovarian tumor: case report. EUR J GYNAECOL ONCOL 2016. [PMID: 27048130 DOI: 10.12892/ejgo2781.2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
There are some pelvic masses which are difficult to correctly classify as malignant or benign. The decision concerning method and choice of surgical intervention is not simple in this situation. Some tumors are extremely rare and need to be presented in the literature. The authors report a rare case of fibrous tumor of the omentum simulating a malignant ovarian tumor, which ultimately resulted to be a primary solitary fibrous tumor of the omentum. Ultrasound findings are mostly precise prognostic tools according ovarian masses. However, from time to time, Doppler blood flow examination may present false positive results.
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10
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McGuyer BH, McDonald M, Iwata GZ, Skomorowski W, Moszynski R, Zelevinsky T. Control of Optical Transitions with Magnetic Fields in Weakly Bound Molecules. Phys Rev Lett 2015; 115:053001. [PMID: 26274416 DOI: 10.1103/physrevlett.115.053001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Indexed: 06/04/2023]
Abstract
In weakly bound diatomic molecules, energy levels are closely spaced and thus more susceptible to mixing by magnetic fields than in the constituent atoms. We use this effect to control the strengths of forbidden optical transitions in (88)Sr2 over 5 orders of magnitude with modest fields by taking advantage of the intercombination-line threshold. The physics behind this remarkable tunability is accurately explained with both a simple model and quantum chemistry calculations, and suggests new possibilities for molecular clocks. We show how mixed quantization in an optical lattice can simplify molecular spectroscopy. Furthermore, our observation of formerly inaccessible f-parity excited states offers an avenue for improving theoretical models of divalent-atom dimers.
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Affiliation(s)
- B H McGuyer
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - M McDonald
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - G Z Iwata
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - W Skomorowski
- Department of Chemistry, Quantum Chemistry Laboratory, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - R Moszynski
- Department of Chemistry, Quantum Chemistry Laboratory, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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11
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McGuyer BH, Osborn CB, McDonald M, Reinaudi G, Skomorowski W, Moszynski R, Zelevinsky T. Nonadiabatic effects in ultracold molecules via anomalous linear and quadratic Zeeman shifts. Phys Rev Lett 2013; 111:243003. [PMID: 24483652 DOI: 10.1103/physrevlett.111.243003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Indexed: 06/03/2023]
Abstract
Anomalously large linear and quadratic Zeeman shifts are measured for weakly bound ultracold 88Sr2 molecules near the intercombination-line asymptote. Nonadiabatic Coriolis coupling and the nature of long-range molecular potentials explain how this effect arises and scales roughly cubically with the size of the molecule. The linear shifts yield nonadiabatic mixing angles of the molecular states. The quadratic shifts are sensitive to nearby opposite f-parity states and exhibit fourth-order corrections, providing a stringent test of a state-of-the-art ab initio model.
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Affiliation(s)
- B H McGuyer
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - C B Osborn
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - M McDonald
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - G Reinaudi
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
| | - W Skomorowski
- Department of Chemistry, Quantum Chemistry Laboratory, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland and Theoretische Physik, Universität Kassel, Heinrich Plett Straße 40, 34132 Kassel, Germany
| | - R Moszynski
- Department of Chemistry, Quantum Chemistry Laboratory, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - T Zelevinsky
- Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027-5255, USA
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12
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Moszynski R, Szpurek D, Michalak S, Szubert S, Sajdak S. The role of endothelin-1 and its correlation with CA125 levels, grayscale ultrasonography and doppler findings in differential diagnoses of ovarian tumors. EUR J GYNAECOL ONCOL 2009; 30:552-556. [PMID: 19899414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
PURPOSE OF INVESTIGATION Assessment of endothelin-1 (ET-1) level for the differential diagnosis of ovarian tumors was performed. METHODS Fifty-three women with ovarian tumors (12 malignant, 41 benign) treated at the Division of Gynecological Surgery, Poznan, Poland were analyzed. ET-1 serum levels were compared with CA125 and Doppler parameters (RI, PI, PSV). The differences were evaluated using the unpaired t-test with Welch's correction (p < 0.05). RESULTS There was statistically significant difference in ET-1 levels between the ovarian cancer and benign tumor groups (3.130 pg/ml and 1.819 pg/ml, respectively). The ROC area for ET-1 and CA125 were 0.727 and 0.791, respectively. A negative linear correlation between the level of ET-1 and RI and a positive linear correlation between the level of ET-1 and PSV in the ovarian cancer group were found. CONCLUSION ET-1 as a new biomarker for predicting ovarian cancer is not satisfying. A correlation between ET-1 levels and Doppler parameters is very interesting and its role in angiogenesis should be studied extensively.
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Affiliation(s)
- R Moszynski
- Division of Gynecological Surgery, Department of Gynecology, Obstetrics and Gynecological Oncology, University of Medical Sciences, Poznan, Poland.
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13
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Szpurek D, Moszynski R, Rafal M, Smolen A, Agata S, Sajdak S, Stefan S. Using logistic regression analysis in preliminary differential diagnosis of adnexal masses. Int J Gynecol Cancer 2006; 15:817-23. [PMID: 16174230 DOI: 10.1111/j.1525-1438.2005.00142.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The aim of our study was to generate predictive model, which would allow to estimate the influence of analyzed parameters on predictive accuracy of differential diagnosis of adnexal masses and to evaluate prospectively diagnostic efficacy of the statistic model in the new set of patients. A total of 686 women diagnosed and surgically treated in the Gynecological and Obstetrical Teaching Hospital of University of Medical Sciences in Poznan, Poland, were recruited into the study. Preoperative diagnostics included gynecological examination, ultrasonographic evaluation, tumor Doppler blood flow analysis, and serum levels of CA125 and TPS. In order to find the best combination of features and to calculate the individual probability of the malignancy, stepwise logistic regression analysis with quasi-Newton estimation was applied. The essential part of the best prognostic model, described by foregoing variables, is as follows: [z = -6.005 + 0.058 x age + 1.174 x septa + 1.317 x tumor localization + 1.185 x ascites + 2.28 x solid element + 2.429 x vessels localization -2.386 x PI + 0.084 x MEDV]. The highest sensitivity and specificity for the obtained model were 87.84% and 93.74%, respectively. Prognostic model, constructed with the use of logistic regression analysis, is characterized by higher sensitivity and specificity than individually applied diagnostic tests. Prospective evaluation of this model application in a larger group of patients with adnexal masses will enable precise assessment of its objective clinical usefulness.
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Affiliation(s)
- D Szpurek
- Division of Gynecological Surgery, Department of Gynecology and Obstetrics, Karol Marcinkowski University of Medical Sciences, Poznan, Poland.
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14
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Moszynski R, Szpurek D, Smolen A, Sajdak S. Comparison of diagnostic usefulness of predictive models in preliminary differentiation of adnexal masses. Int J Gynecol Cancer 2006; 16:45-51. [PMID: 16445609 DOI: 10.1111/j.1525-1438.2006.00277.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to compare prognostic models evaluating the probability of an ovarian cancer occurrence based on a number of clinical and ultrasonographic data in women with adnexal masses. A total of 686 women with adnexal masses underwent the examinations between 1994 and 2002. The recorded parameters included: age, menopausal status, body mass index, the grayscale and Doppler ultrasonographic examination, and selected markers concentration levels. In order to find the best combination of features, which significantly influences the probability of malignancy, stepwise logistic regression analysis, as well as artificial neural network, was used. The diagnostic efficiency of received models was estimated and compared using receiver-operating characteristics (ROC) curve. The results indicate that 431 and 255 patients had a benign and malignant ovarian tumor, respectively. Application of stepwise logistic regression analysis revealed statistically significant importance of eight features. The sensitivity and specificity for the received model were 65.71% and 77.59%, respectively. Three-layer perceptron network shows 13 features as significant predictors of malignancy. The network gave a sensitivity of 85.7% and specificity of 93.1%. Comparison of area under ROC curve for received models was 0.9679 vs 0.9716. Prognostic values of the analyzed neural model are not optimal but seem to surpass logistic regression model in terms of the predictive possibilities.
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Affiliation(s)
- R Moszynski
- Division of Gynecological Surgery, Karol Marcinkowski University of Medical Sciences, 33 Polna Street, 60-535 Poznan, Poland
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Szpurek D, Moszynski R, Smolen A, Sajdak S. Artificial neural network computer prediction of ovarian malignancy in women with adnexal masses. Int J Gynaecol Obstet 2005; 89:108-13. [PMID: 15847872 DOI: 10.1016/j.ijgo.2005.01.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2004] [Revised: 01/03/2005] [Accepted: 01/05/2005] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Assessment of the usefulness of a neural model to predict which ovarian tumors are malignant. METHOD Age, menopausal status, body mass index, grayscale and Doppler ultrasonographic features, as well as levels of specific markers (CA 125, tissue polypeptide specific antigen) were examined in 686 women with adnexal masses. The probability of malignancy was calculated using an artificial neural network software and the diagnostic efficiency of the received model was estimated using a receiver-operating characteristics (ROC) curve. RESULT Of the 686 women, 431 (62.8%) had a benign and 255 (37.2%) had a malignant ovarian tumor. The significant malignancy predictors are age, menopausal status, maximum tumor diameter, internal wall structure of tumor, presence of septa and/or solid elements, tumor location, location of vessels, and blood flow indexes. The best network provided 96.0% sensitivity and 97.7% specificity. The area under the curve for the received model was 0.9716. CONCLUSIONS An artificial neural network model based on clinical and ultrasonographic data allows to calculate the probability of tumor malignancy.
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Affiliation(s)
- D Szpurek
- Division of Gynecological Surgery, Karol Marcinkowski University of Medical Sciences, Poznan, Poland.
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Szpurek D, Moszynski R, Zietkowiak W, Spaczynski M, Sajdak S. An ultrasonographic morphological index for prediction of ovarian tumor malignancy. EUR J GYNAECOL ONCOL 2005; 26:51-4. [PMID: 15755001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
PURPOSE OF INVESTIGATION A newly created ultrasonographic scale called the Poznan index as well as scales already well known (introduced by Sassone, De Priest and Lerner) were compared in our group of patients. METHOD A morphological index was based on seven sonographic ovarian tumor features. Examinations on 686 patients were evaluated. Comparison of prognostic values of the Poznan index with other applied morphological indices in our group of patients was based on the area under receiver operating characteristic (ROC) curves. RESULTS The cut-off level of the new index is 8 points. The new morphological index has a specificity of 77.0%, and negative and positive predictive values of 90.7% and 69.1%, respectively. It has a sensitivity of 86.7% and accuracy of 80.6%. The Poznan index proved its usefulness and superiority (AU ROC = 0.89). CONCLUSION Using this morphological index it is possible to make a precise prognosis of ovarian tumor malignancy. It also makes it possible to make the right decision concerning the manner of surgical treatment.
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Affiliation(s)
- D Szpurek
- Division of Gynecological Surgery, Department of Gynecology and Obstetrics, Karol Marcinkowski University of Medical Sciences, Poznan, Poland
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Sajdak S, Moszynski R, Opala T. Bleeding from endometrial and vaginal malignant tumors treated with activated recombinant factor VII. EUR J GYNAECOL ONCOL 2003; 23:325-6. [PMID: 12214734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The authors report two cases of successful employment of human recombinant activated factor VII in gynecological oncological patients (endometrial cancer and vaginal sarcoma) without pre-existing coagulopathy. They conclude that recombinant factor VIIa may be an important and effective drug in severe bleeding in gynecological oncology.
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Affiliation(s)
- S Sajdak
- Department of Gynecology and Obstetrics, Karol Marcinkowski University of Medical Sciences, Poznan, Poland.
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Milet A, Struniewicz C, Moszynski R, Sadlej J, Kisiel Z, Białkowska-Jaworska E, Pszczółkowski L. Structure and properties of the weakly bound trimer (H2O)2HCl. Theoretical predictions and comparison with high-resolution rotational spectroscopy. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00449-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kisiel Z, Białkowska-Jaworska E, Pszczółkowski L, Milet A, Struniewicz C, Moszynski R, Sadlej J. Structure and properties of the weakly bound trimer (H2O)2HCl observed by rotational spectroscopy. J Chem Phys 2000. [DOI: 10.1063/1.481152] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- J. Sadlej
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland, and Drug Institute, Chelmska 30/34, 00-725 Warsaw, Poland
| | - R. Moszynski
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland, and Laboratoire de Chimie Théorique, UMR 7551 CNRS/ULP, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - J. Cz. Dobrowolski
- Drug Institute, Chelmska 30/34, 00-725 Warsaw, Poland, and Industrial Chemistry Research Institute, Rydygiera 8, 01-793 Warsaw, Poland
| | - A. P. Mazurek
- Drug Institute, Chelmska 30/34, 00-725 Warsaw, Poland
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Tang K, Toennies J, Yiu C, Ćwiok T, Jeziorski B, Kołos W, Moszynski R. A perturbation calculation of the ground state (X 1Σ+g) energy of the hydrogen molecule. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00589-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Moszynski R, Jeziorski B, Wormer P, van der Avoird A. Rovibrational spectra of ArH2 and ArD2 van der Waals complexes from an ab initio SAPT potential. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)87033-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ćwiok T, Jeziorski B, Kol/os W, Moszynski R, Szalewicz K. On the convergence of the symmetrized Rayleigh–Schrödinger perturbation theory for molecular interaction energies. J Chem Phys 1992. [DOI: 10.1063/1.463475] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jeziorski B, Szalewicz K, Scrinzi A, Zhao X, Moszynski R, Kolos W, Velenik A. Muon sticking fractions for S states of the td micro muon including the effects of nuclear interactions. Phys Rev A 1991; 43:1640-1643. [PMID: 9905198 DOI: 10.1103/physreva.43.1640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Szalewicz K, Jeziorski B, Scrinzi A, Zhao X, Moszynski R, Kolos W, Froelich P, Monkhorst HJ, Velenik A. Effects of nuclear forces in muon-catalyzed fusion: Nonadiabatic treatment of energy shifts and fusion rates for S states of td micro. Phys Rev A 1990; 42:3768-3778. [PMID: 9904473 DOI: 10.1103/physreva.42.3768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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