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Spectroscopic observations, spin-orbit functions, and coupled-channel deperturbation analysis of data on the A (1)Sigma(+)(u) and b (3)Pi(u) states of Rb-2

Salami, H.; Bergeman, T.; Beser, B.; Bai, J.; Ahmed, E. H.; Kotochigova, S.; Lyyra, Marjatta LU ; Huennekens, J.; Lisdat, C. and Stolyarov, A. V., et al. (2009) In Physical Review A (Atomic, Molecular and Optical Physics) 80(2).
Abstract
We present experimentally derived potential curves and spin-orbit interaction functions for the strongly perturbed A (1)Sigma(+)(u) and b (3)Pi(u) states of the rubidium dimer. The results are based on laser-induced fluorescence and optical-optical double-resonance polarization spectroscopy measurements combined with earlier laser-induced fluorescence data. We used an analytic potential (Hannover form) incorporated in a discrete variable representation of the Hamiltonian matrix for numerical energy-level calculation. A previous vibrational assignment of the A levels is confirmed, and very probable vibrational assignment for the b levels is also obtained. Currently, the rms residual of our fit is 0.053 cm(-1) as compared to the typical... (More)
We present experimentally derived potential curves and spin-orbit interaction functions for the strongly perturbed A (1)Sigma(+)(u) and b (3)Pi(u) states of the rubidium dimer. The results are based on laser-induced fluorescence and optical-optical double-resonance polarization spectroscopy measurements combined with earlier laser-induced fluorescence data. We used an analytic potential (Hannover form) incorporated in a discrete variable representation of the Hamiltonian matrix for numerical energy-level calculation. A previous vibrational assignment of the A levels is confirmed, and very probable vibrational assignment for the b levels is also obtained. Currently, the rms residual of our fit is 0.053 cm(-1) as compared to the typical experimental uncertainties that are estimated to be 0.005 cm(-1). Fitted diagonal and off-diagonal spin-orbit functions are obtained and compared with ab initio calculations by all electrons and effective core pseudopotential methods. Analysis of the computational results yields an explanation for the ubiquitous single minima in these spin-orbit functions, which can be represented approximately by Morse-type functions. (Less)
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published
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Physical Review A (Atomic, Molecular and Optical Physics)
volume
80
issue
2
publisher
American Physical Society (APS)
external identifiers
  • wos:000269638200087
  • scopus:69449107453
ISSN
1050-2947
DOI
10.1103/PhysRevA.80.022515
language
English
LU publication?
yes
id
0a6230df-c4ef-44d6-8fec-e0745b2391cf (old id 1474980)
date added to LUP
2009-10-02 11:44:24
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2017-06-04 03:41:37
@article{0a6230df-c4ef-44d6-8fec-e0745b2391cf,
  abstract     = {We present experimentally derived potential curves and spin-orbit interaction functions for the strongly perturbed A (1)Sigma(+)(u) and b (3)Pi(u) states of the rubidium dimer. The results are based on laser-induced fluorescence and optical-optical double-resonance polarization spectroscopy measurements combined with earlier laser-induced fluorescence data. We used an analytic potential (Hannover form) incorporated in a discrete variable representation of the Hamiltonian matrix for numerical energy-level calculation. A previous vibrational assignment of the A levels is confirmed, and very probable vibrational assignment for the b levels is also obtained. Currently, the rms residual of our fit is 0.053 cm(-1) as compared to the typical experimental uncertainties that are estimated to be 0.005 cm(-1). Fitted diagonal and off-diagonal spin-orbit functions are obtained and compared with ab initio calculations by all electrons and effective core pseudopotential methods. Analysis of the computational results yields an explanation for the ubiquitous single minima in these spin-orbit functions, which can be represented approximately by Morse-type functions.},
  author       = {Salami, H. and Bergeman, T. and Beser, B. and Bai, J. and Ahmed, E. H. and Kotochigova, S. and Lyyra, Marjatta and Huennekens, J. and Lisdat, C. and Stolyarov, A. V. and Dulieu, O. and Crozet, P. and Ross, A. J.},
  issn         = {1050-2947},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Spectroscopic observations, spin-orbit functions, and coupled-channel deperturbation analysis of data on the A (1)Sigma(+)(u) and b (3)Pi(u) states of Rb-2},
  url          = {http://dx.doi.org/10.1103/PhysRevA.80.022515},
  volume       = {80},
  year         = {2009},
}