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Hakalla R, Trivikram TM, Heays AN, Salumbides EJ, de Oliveira N, Field RW, Ubachs W. Precision spectroscopy and comprehensive analysis of perturbations in the A 1∏( v = 0) state of 13C 18O. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1495848] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- R. Hakalla
- Materials Spectroscopy Laboratory, Faculty of Mathematics and Natural Science, University of Rzeszów, RZ, Poland
| | - T. M. Trivikram
- Department of Physics and Astronomy and LaserLaB, Vrije Universiteit, Amsterdam, Netherlands
| | - A. N. Heays
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, Paris, France
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA
| | - E. J. Salumbides
- Department of Physics and Astronomy and LaserLaB, Vrije Universiteit, Amsterdam, Netherlands
| | | | - R. W. Field
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - W. Ubachs
- Department of Physics and Astronomy and LaserLaB, Vrije Universiteit, Amsterdam, Netherlands
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Trivikram TM, Hakalla R, Heays AN, Niu ML, Scheidegger S, Salumbides EJ, de Oliveira N, Field RW, Ubachs W. Perturbations in the A 1Π, v = 0 state of 12C 18O investigated via complementary spectroscopic techniques. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1356477] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- T. Madhu Trivikram
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - R. Hakalla
- Materials Spectroscopy Laboratory, Faculty of Mathematics and Natural Science, University of Rzeszów, Rzeszów, Poland
| | - A. N. Heays
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Meudon, France
| | - M. L. Niu
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - S. Scheidegger
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - E. J. Salumbides
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - N. de Oliveira
- Synchrotron SOLEIL, Orme de Merisiers, St. Aubin, Cedex, France
| | - R. W. Field
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - W. Ubachs
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
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Trivikram TM, Niu ML, Wcisło P, Ubachs W, Salumbides EJ. Precision measurements and test of molecular theory in highly excited vibrational states of H 2 ( v = 11). APPLIED PHYSICS. B, LASERS AND OPTICS 2016; 122:294. [PMID: 32336882 PMCID: PMC7154793 DOI: 10.1007/s00340-016-6570-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 11/04/2016] [Indexed: 06/08/2023]
Abstract
Accurate E F 1 Σ g + - X 1 Σ g + transition energies in molecular hydrogen were determined for transitions originating from levels with highly excited vibrational quantum number, v = 11, in the ground electronic state. Doppler-free two-photon spectroscopy was applied on vibrationally excited H 2 ∗ , produced via the photodissociation of H2S, yielding transition frequencies with accuracies of 45 MHz or 0.0015 cm-1. An important improvement is the enhanced detection efficiency by resonant excitation to autoionizing 7 p π electronic Rydberg states, resulting in narrow transitions due to reduced ac-Stark effects. Using known EF level energies, the level energies of X(v = 11, J = 1, 3-5) states are derived with accuracies of typically 0.002 cm-1. These experimental values are in excellent agreement with and are more accurate than the results obtained from the most advanced ab initio molecular theory calculations including relativistic and QED contributions.
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Affiliation(s)
- T. Madhu Trivikram
- Department of Physics and Astronomy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - M. L. Niu
- Department of Physics and Astronomy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - P. Wcisło
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland
| | - W. Ubachs
- Department of Physics and Astronomy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - E. J. Salumbides
- Department of Physics and Astronomy, LaserLaB, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
- Department of Physics, University of San Carlos, 6000 Cebu City, Philippines
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Niu ML, Hakalla R, Trivikram TM, Heays AN, de Oliveira N, Salumbides EJ, Ubachs W. Spectroscopy and perturbation analysis of the A 1π (v=0) state of 13 C 16 O. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1218078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- M. L. Niu
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - R. Hakalla
- Department of Experimental Physics, Materials Spectroscopy Laboratory, Faculty of Mathematics and Natural Science, University of Rzeszów, Rzeszów, Poland
| | - T. Madhu Trivikram
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - A. N. Heays
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - N. de Oliveira
- Synchrotron SOLEIL, Orme de Merisiers, St. Aubin, BP 48, F-91192 Gif sur Yvette Cedex, France
| | - E. J. Salumbides
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
| | - W. Ubachs
- Department of Physics and Astronomy, and LaserLaB, Vrije Universiteit, Amsterdam, The Netherlands
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CONSTRAINT ON A COSMOLOGICAL VARIATION IN THE PROTON-TO-ELECTRON MASS RATIO FROM ELECTRONIC CO ABSORPTION. ACTA ACUST UNITED AC 2016. [DOI: 10.3847/0004-637x/826/2/192] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Hakalla R, Niu ML, Field RW, Salumbides EJ, Heays AN, Stark G, Lyons JR, Eidelsberg M, Lemaire JL, Federman SR, Zachwieja M, Szajna W, Kolek P, Piotrowska I, Ostrowska-Kopeć M, Kępa R, de Oliveira N, Ubachs W. VIS and VUV spectroscopy of 12C 17O and deperturbation analysis of the A 1Π, υ = 1–5 levels. RSC Adv 2016. [DOI: 10.1039/c6ra01358a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The reduced T(J) − BAJ(J + 1) + DAJ2(J + 1)2 term values for the 12C17O A1Π (υ = 5) level and for the hypothetical unperturbed crossing rovibronic levels of the perturbers.
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Niu ML, Salumbides EJ, Heays AN, de Oliveira N, Field RW, Ubachs W. Spectroscopy and perturbation analysis of the CO A1Π −X1Σ+(2,0), (3,0) and (4,0) bands. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1108472] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Niu ML, Salumbides EJ, Ubachs W. Communication: Test of quantum chemistry in vibrationally hot hydrogen molecules. J Chem Phys 2015; 143:081102. [PMID: 26328810 DOI: 10.1063/1.4929568] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Precision measurements are performed on highly excited vibrational quantum states of molecular hydrogen. The v = 12, J = 0 - 3 rovibrational levels of H2 (X(1)Σg (+)), lying only 2000 cm(-1) below the first dissociation limit, were populated by photodissociation of H2S and their level energies were accurately determined by two-photon Doppler-free spectroscopy. A comparison between the experimental results on v = 12 level energies with the best ab initio calculations shows a good agreement, where the present experimental accuracy of 3.5 × 10(-3) cm(-1) is more precise than theory, hence providing a gateway to further test theoretical advances in this benchmark quantum system.
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Affiliation(s)
- M L Niu
- Department of Physics and Astronomy and LaserLaB, VU University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - E J Salumbides
- Department of Physics and Astronomy and LaserLaB, VU University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - W Ubachs
- Department of Physics and Astronomy and LaserLaB, VU University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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