1
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Lim M, Matsuoka L. Quantitative analysis and speciation of alkali metal emissions from biomass combustion in a 150 kWth furnace by optical emission spectroscopy. CHEM ENG COMMUN 2019. [DOI: 10.1080/00986445.2019.1647182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Mooktzeng Lim
- Biomass and Plasma Technologies, Renewable Energy and Green Technology, Kajang, Selangor, Malaysia
| | - Leo Matsuoka
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Kagamiyama, Japan
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2
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Long DA, Fleisher AJ, Plusquellic DF, Hodges JT. Electromagnetically induced transparency in vacuum and buffer gas potassium cells probed via electro-optic frequency combs. OPTICS LETTERS 2017; 42:4430-4433. [PMID: 29088179 PMCID: PMC5831322 DOI: 10.1364/ol.42.004430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 10/02/2017] [Indexed: 05/28/2023]
Abstract
Electromagnetically induced transparency (EIT) in K39 and K41 was probed using electro-optic frequency combs generated by applying chirped waveforms to a phase modulator. The carrier tone of the frequency comb served as the pump beam and induced the necessary optical cycling. Comb tooth spacings as narrow as 20 kHz were used to probe potassium in both buffer gas and evacuated cells at elevated temperatures. Atomic absorption features as narrow as 33(5) kHz were observed, allowing for the K39 lower-state hyperfine splitting to be optically measured with a fit uncertainty of 2 kHz. Due to the ultranarrow width of the EIT features, long-lived optical free induction decays were also observed which allowed for background-free detection.
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Affiliation(s)
- D. A. Long
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - A. J. Fleisher
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - D. F. Plusquellic
- Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J. T. Hodges
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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3
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Mabrouk N, Berriche H. Theoretical evaluation of the radiative lifetimes of LiCs and NaCs in the A1Σ+ state. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2017. [DOI: 10.1134/s0036024417080192] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Lampis A, Culver R, Megyeri B, Goldwin J. Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor. OPTICS EXPRESS 2016; 24:15494-15505. [PMID: 27410824 DOI: 10.1364/oe.24.015494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We study electromagnetically induced transparency (EIT) in a heated potassium vapor cell, using a simple optical setup with a single free-running diode laser and an acousto-optic modulator. Despite the fact that the Doppler width is comparable to the ground state hyperfine splitting, transparency windows with deeply sub-natural line widths and large group indices are obtained. A longitudinal magnetic field is used to split the EIT feature and induce magneto-optical anisotropy. Using the beat note between co-propagating coupling and probe beams, we perform a heterodyne measurement of the circular dichroism (and therefore birefringence) of the EIT medium. The observed spectra reveal that lin‖lin polarizations lead to greater anisotropy than lin⊥lin. A simplified ‖analytical model encompassing sixteen Zeeman states and eighteen Λ subsytems reproduces the experimental observations.
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5
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6
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Auslender I, Barmashenko B, Rosenwaks S, Zhdanov B, Rotondaro M, Knize RJ. Modeling of pulsed K diode pumped alkali laser: Analysis of the experimental results. OPTICS EXPRESS 2015; 23:20986-20996. [PMID: 26367951 DOI: 10.1364/oe.23.020986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A simple optical model of K DPAL, where Gaussian spatial shapes of the pump and laser intensities in any cross section of the beams are assumed, is reported. The model, applied to the recently reported highly efficient static, pulsed K DPAL [Zhdanov et al, Optics Express 22, 17266 (2014)], shows good agreement between the calculated and measured dependence of the laser power on the incident pump power. In particular, the model reproduces the observed threshold pump power, 22 W (corresponding to pump intensity of 4 kW/cm2), which is much higher than that predicted by the standard semi-analytical models of the DPAL. The reason for the large values of the threshold power is that the volume occupied by the excited K atoms contributing to the spontaneous emission is much larger than the volumes of the pump and laser beams in the laser cell, resulting in very large energy losses due to the spontaneous emission. To reduce the adverse effect of the high threshold power, high pump power is needed, and therefore gas flow with high gas velocity to avoid heating the gas has to be applied. Thus, for obtaining high power, highly efficient K DPAL, subsonic or supersonic flowing-gas device is needed.
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7
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Holmgren WF, Trubko R, Hromada I, Cronin AD. Measurement of a wavelength of light for which the energy shift for an atom vanishes. PHYSICAL REVIEW LETTERS 2012; 109:243004. [PMID: 23368315 DOI: 10.1103/physrevlett.109.243004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Indexed: 06/01/2023]
Abstract
Light at a magic-zero wavelength causes a zero energy shift for an atom. We measured the longest magic-zero wavelength for ground state potassium atoms to be λ(zero)=768.9712(15) nm, and we show how this measurement provides an improved experimental benchmark for atomic structure calculations. This λ(zero) measurement determines the ratio of the potassium atom D1 and D2 line strengths with record precision. It also demonstrates a new application for atom interferometry, and we discuss how decoherence will fundamentally limit future measurements of magic-zero wavelengths.
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Affiliation(s)
- William F Holmgren
- Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
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8
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Stwalley WC, Bellos M, Carollo R, Banerjee J, Bermudez M. Shortcuts for understanding rovibronic spectroscopy of ultracold alkali metal diatomic molecules. Mol Phys 2012. [DOI: 10.1080/00268976.2012.676680] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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Pahwa K, Mudarikwa L, Goldwin J. Polarization spectroscopy and magnetically-induced dichroism of the potassium D2 lines. OPTICS EXPRESS 2012; 20:17456-17466. [PMID: 23038298 DOI: 10.1364/oe.20.017456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We study modulation-free methods for producing sub-Doppler, dispersive line shapes for laser stabilization near the potassium D(2) transitions at 767 nm. Polarization spectroscopy is performed and a comparison is made between the use of a mirror or beam splitter for aligning the counter-propagating pump and probe beams. Conventional magnetically-induced dichroism is found to suffer from a small dispersion and large background offset. We therefore introduce a modified scheme, using two spatially separated pump-probe beam pairs. Finally we compare our results to methods using phase modulation and heterodyne detection.
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Affiliation(s)
- K Pahwa
- Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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Takasu Y, Saito Y, Takahashi Y, Borkowski M, Ciuryło R, Julienne PS. Controlled production of subradiant states of a diatomic molecule in an optical lattice. PHYSICAL REVIEW LETTERS 2012; 108:173002. [PMID: 22680859 DOI: 10.1103/physrevlett.108.173002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Indexed: 06/01/2023]
Abstract
We report the successful production of subradiant states of a two-atom system in a three-dimensional optical lattice starting from doubly occupied sites in a Mott insulator phase of a quantum gas of atomic ytterbium. We can selectively produce either a subradiant 1(g) state or a superradiant 0(u) state by choosing the excitation laser frequency. The inherent weak excitation rate for the subradiant 1(g) state is overcome by the increased atomic density due to the tight confinement in a three-dimensional optical lattice. Our experimental measurements of binding energies, linewidth, and Zeeman shift confirm the observation of subradiant levels of the 1(g) state of the Yb(2) molecule.
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Affiliation(s)
- Yosuke Takasu
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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11
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Wu J, Ma J, Zhang Y, Li Y, Wang L, Zhao Y, Chen G, Xiao L, Jia S. High sensitive trap loss spectroscopic detection of the lowest vibrational levels of ultracold molecules. Phys Chem Chem Phys 2011; 13:18921-5. [PMID: 21952322 DOI: 10.1039/c1cp22314c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a controllable three-dimensional fluorescence modulation technique for the high sensitive trap loss detection of ultracold molecules. The lowest vibrational levels (v = 0 and 1) of the pure long-range state 0(-)(g) (6S(1/2) + 6P(3/2)) of a cesium molecule are detected directly with high rotational resolution. Our technique proved to be a robust tool for effectively improving the detection sensitivity of trap loss spectroscopy.
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Affiliation(s)
- Jizhou Wu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, 030006, China
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12
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Ma J, Wu J, Zhao Y, Xiao L, Jia S. Determination of the rotational constant of the Cs2 0g- (6s + 6p3/2) state by trap loss spectroscopy. OPTICS EXPRESS 2010; 18:17089-17095. [PMID: 20721097 DOI: 10.1364/oe.18.017089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
we demonstrated a high sensitive trap-loss spectroscopy technique by modulating fluorescence of cold atoms in magneto-optical trap, which allow a direct spectroscopy detection of the rovibrational levels with a very weak transition probability. The low-lying vibrational spectroscopy of upsilon = 3 approximately 17 of Cs(2) 0g- pure long-range state have been observed with rotational structures, which are well resolved up to J = 8. The rotational constants are obtained by fitting experimental data to a nonrigid rotation model.
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Affiliation(s)
- Jie Ma
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006 P.R.China
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Jraij A, Allouche AR, Magnier S, Aubert-Frécon M. Theoretical investigation of the Ωg,u(+/−) states of K2 dissociating adiabatically up to K(4p P23/2)+K(4p P23/2). J Chem Phys 2009; 130:244307. [DOI: 10.1063/1.3158361] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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14
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Abstract
This review summarizes progress in coherent control as well as relevant recent achievements, highlighting, among several different schemes of coherent control, wave-packet interferometry (WPI). WPI is a fundamental and versatile scenario used to control a variety of quantum systems with a sequence of short laser pulses whose relative phase is finely adjusted to control the interference of electronic or nuclear wave packets (WPs). It is also useful in retrieving quantum information such as the amplitudes and phases of eigenfunctions superposed to generate a WP. Experimental and theoretical efforts to retrieve both the amplitude and phase information are recounted. This review also discusses information processing based on the eigenfunctions of atoms and molecules as one of the modern and future applications of coherent control. The ultrafast coherent control of ultracold atoms and molecules and the coherent control of complex systems are briefly discussed as future perspectives.
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Affiliation(s)
- Kenji Ohmori
- Institute for Molecular Science, National Institutes of Natural Sciences; The Graduate University for Advanced Studies (SOKENDAI); and CREST, Japan Science and Technology Agency, Myodaiji, Okazaki 444-8585, Japan
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15
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Falke S, Sherstov I, Tiemann E, Lisdat C. The AΣu+1 state of K2 up to the dissociation limit. J Chem Phys 2006; 125:224303. [PMID: 17176137 DOI: 10.1063/1.2375120] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report an experimental study of the K(2) A (1)Sigma(u) (+) state. Long-range levels up to the dissociation limit were observed in a two laser spectroscopic experiment using a highly collimated molecular beam. We derive an analytical potential energy curve for the complete A state including long-range dispersion terms. From these, we obtain radiative atomic lifetimes of 26.74(3) ns for the 4p(1/2) state and 26.39(3) ns for the 4p(3/2) state of (39)K. The dissociation energy of the X (1)Sigma(g) (+) ground state with respect to v=0, J=0 is found to be D(0)=4404.808(4) cm(-1).
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Affiliation(s)
- St Falke
- Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany.
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Normand B, Stwalley WC. Calculations of long-range potential wells for highly excited homonuclear and heteronuclear alkali dimers. J Chem Phys 2004; 121:285-91. [PMID: 15260547 DOI: 10.1063/1.1747794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The weakly bound long-range potential curves between a highly excited alkali atom M(*)(n(e)s) and a ground state alkali atom M(n(g)s) are calculated using simple but reasonably accurate models for long-range dispersion and exchange interactions for all homonuclear and heteronuclear combinations. For K(2), where experimental results are available, the agreement is quite good (binding energies of observed vibrational levels within approximately 10%). We find that at least a zero-point vibrational level occurs for n(e)-n(g)</=12.
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Affiliation(s)
- Bradford Normand
- Department of Physics, Unit 3046, University of Connecticut, Storrs, Connecticut 06269-3046, USA
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17
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de Araujo LEE, Weinstein JD, Gensemer SD, Fatemi FK, Jones KM, Lett PD, Tiesinga E. Two-color photoassociation spectroscopy of the lowest triplet potential of Na2. J Chem Phys 2003. [DOI: 10.1063/1.1585028] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Pichler M, Chen HM, Wang H, Stwalley WC, Ross AJ, Martin F, Aubert-Frécon M, Russier-Antoine I. Photoassociation of ultracold K atoms: Observation of high lying levels of the 1g∼1 1Πg molecular state of K2. J Chem Phys 2003. [DOI: 10.1063/1.1563609] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Bergeman T, Julienne PS, Williams CJ, Tiesinga E, Manaa MR, Wang H, Gould PL, Stwalley WC. Predissociations in 0u+ and 1g states of K2. J Chem Phys 2002. [DOI: 10.1063/1.1508375] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Normand B, Zemke WT, Côté, R, Pichler M, Stwalley WC. Calculations of Long Range Potential Wells for Cs 2 Molecules below the Cs ( ns, n ≥ 8) + Cs (6s) Asymptotes. J Phys Chem A 2002. [DOI: 10.1021/jp020518k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bradford Normand
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046
| | - Warren T. Zemke
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046
| | - Robin Côté,
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046
| | - Marin Pichler
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046
| | - William C. Stwalley
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046
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21
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Magnier S, Aubert-Frécon M, Le Sech C. Model Potential Calculations for Various Electronic Excited States of Li- and Na-. J Phys Chem A 2001. [DOI: 10.1021/jp0111315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Magnier
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
| | - M. Aubert-Frécon
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
| | - C. Le Sech
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
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Abstract
This review focuses on the study of the dynamics of isolated molecules and their control using coherent nonlinear spectroscopic methods. Emphasis is placed on topics such as bound-to-free excitation and the study of concerted elimination reactions, free-to-bound excitation and the study of bimolecular reactions, and bound-to-bound excitation and the study of intramolecular rovibrational dynamics and coherence relaxation. For each case the detailed time-resolved information reveals possible strategies to control the outcome. Experimental results are shown for each of the reactions discussed. The methods discussed include pump-probe and four-wave mixing processes such as transient grating and photon echo spectroscopy. Off-resonance transient-grating experiments are shown to be ideal for the study of ground state dynamics, molecular structure, and the molecular response to strong field excitation.
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Affiliation(s)
- M Dantus
- Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824, USA.
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Van Hooydonk G. Gauge symmetry, chirality and parity effects in four-particle systems: Coulomb's law as a universal function for diatomic molecules. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2000; 56A:2273-2331. [PMID: 11075672 DOI: 10.1016/s1386-1425(00)00298-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Following recent work in search for a universal function (Van Hooydonk, Eur. J. Inorg. Chem., (1999), 1617), we test four symmetric +/- a(n)Rn potentials for reproducing molecular potential energy curves (PECs). Classical gauge symmetry for 1/R-potentials results in generic left right asymmetric PECs. A pair of symmetric perturbed Coulomb potentials is quantitatively in accordance with observed PECs. For a bond, a four-particle system, charge inversion (a parity effect, atom chirality) is the key to explain this shape generically. A parity adapted Hamiltonian reduces from ten to two terms and to a soluble Bohr-like formula, a Kratzer (1 - Re/R)2 potential. The result is similar to the combined action of spin and wave function symmetry upon the Hamiltonian in Heitler-London theory. Analytical perturbed Coulomb functions varying with (1 - Re/R) scale attractive and repulsive branches of PECs for 13 bonds H2, HF, LiH, KH, AuH, Li2, LiF, KLi, NaCs, Rb2, RbCs, Cs2 and I2 in a single straight line. The 400 turning points for 13 bonds are reproduced with a deviation of 0.007 A at both branches. For 230 points at the repulsive side, the deviation is 0.003 A. The perturbed electrostatic Coulomb law is a universal molecular function. Ab initio zero molecular parameter functions give PECs of acceptable quality, just using atomic ionisation energies. The function can be used as a model potential for inverting levels and gives a first principle's comparison of short- and long-range interactions, important for the study of cold atoms. Wave-packet dynamics, femto-chemistry applied to the crossing of covalent and ionic curves, can provide evidence for this theory. We anticipate this scale/shape invariant scheme applies to smaller scales in nuclear and high-energy particle physics. For larger gravitational scales (Newton 1/R potentials), problems with super-unification are discussed. Reactions between hydrogen and antihydrogen, feasible in the near future, will probably produce normal H2.
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Affiliation(s)
- G Van Hooydonk
- Department of Library Sciences, Ghent University, Belgium.
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24
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Nikolov AN, Ensher JR, Eyler EE, Wang H, Stwalley WC, Gould PL. Efficient production of ground-state potassium molecules at sub-mK temperatures by two-step photoassociation. PHYSICAL REVIEW LETTERS 2000; 84:246-249. [PMID: 11015882 DOI: 10.1103/physrevlett.84.246] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/1999] [Indexed: 05/23/2023]
Abstract
We have developed a two-step " R-transfer" method that efficiently produces translationally ultracold potassium molecules in the X (1)Sigma(+)(g) electronic ground state. Laser-cooled atoms are initially photoassociated at large internuclear separation R to form molecules in high vibrational levels of the 1 (1)Pi(g) state, which are in turn excited by an additional laser to shorter-range Rydberg states such as 5 (1)Pi(u) and 6 (1)Pi(u). Subsequent radiative decay produces ground-state molecules at rates up to 10(5) molecules/second per vibrational level.
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Affiliation(s)
- AN Nikolov
- University of Connecticut, Department of Physics, U-3046, Storrs, Connecticut 06269, USA
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25
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Zemke WT, Stwalley WC. Analysis of exchange energy at long range for states of alkali diatomic molecules correlating to two ground state atoms. J Chem Phys 1999. [DOI: 10.1063/1.479755] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Stwalley WC, Wang H. Photoassociation of Ultracold Atoms: A New Spectroscopic Technique. JOURNAL OF MOLECULAR SPECTROSCOPY 1999; 195:194-228. [PMID: 10329265 DOI: 10.1006/jmsp.1999.7838] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The new spectroscopic technique of photoassociation of ultracold atoms is reviewed, with an emphasis on connecting this area to traditional bound-state molecular spectroscopy. In particular, in contrast to photoassociative spectra at thermal energies, which are broad and of low information content, photoassociative spectra of ultracold atoms are high resolution, permitting observation of small vibrational and rotational spacings of long-range molecular levels near dissociation (typically with outer classical turning points >20 Å). The types of detection and theoretical analysis employed are illustrated, primarily using the example of 39K2. Future directions and applications of this field (e.g., to ultracold molecular formation) are also discussed. Copyright 1999 Academic Press.
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Affiliation(s)
- WC Stwalley
- Department of Physics, University of Connecticut, 2152 Hillside Road, Storrs, Connecticut, 06269-3046
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27
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Bégué D, Mérawa M, Rérat M, Pouchan C. Long-range coefficients for the low-lying electronic states of BeLi and Be2. J Chem Phys 1999. [DOI: 10.1063/1.477869] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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28
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Aubert-Frécon M, Rousseau S, Hadinger G, Magnier S. An Analytical Formula for the Energy of the Bound Long-Range 0(-)g((1)3Pig) State of Cs2. JOURNAL OF MOLECULAR SPECTROSCOPY 1998; 192:239-242. [PMID: 9770411 DOI: 10.1006/jmsp.1998.7690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- M Aubert-Frécon
- Laboratoire de Spectrométrie Ionique et Moléculaire (UMR No 5579), CNRS et Université Lyon I, Bât. 205, Villeurbanne Cedex, F-69622, France
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29
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Korolkov M, Schmidt B. Vibrationally state-selective laser pulse control of electronic branching in OH (X/A) photoassociation. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00219-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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30
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Russier I, Aubert-Frécon M, Ross AJ, Martin F, Yiannopoulou A, Crozet P. The (1)1Πg state of 39K2 revisited. J Chem Phys 1998. [DOI: 10.1063/1.476870] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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