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Spectroscopy of quasimolecular optical transitions : Ca(4s2 1S0 ↔ 4s4p 1P, 4s3d 1D2)-He. The influence of radiation width. / Bichoutskaia, E.; Devdariani, A.; Ohmori, K.; Misaki, O.; Ueda, K.; Sato, Y.
в: Journal of Physics B: Atomic, Molecular and Optical Physics, Том 34, № 12, 28.06.2001, стр. 2301-2312.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Spectroscopy of quasimolecular optical transitions
T2 - Ca(4s2 1S0 ↔ 4s4p 1P, 4s3d 1D2)-He. The influence of radiation width
AU - Bichoutskaia, E.
AU - Devdariani, A.
AU - Ohmori, K.
AU - Misaki, O.
AU - Ueda, K.
AU - Sato, Y.
PY - 2001/6/28
Y1 - 2001/6/28
N2 - We perform calculations using the semiclassical Fourier approach for quasimolecular spectra induced by thermal collisions of the excited calcium atom (Ca*) with the helium atom in the ground state (He) for the following quasimolecular optical transitions: (Ω = 0+, 4s4p 1P) ↔ (Ω = 0+, 4s2 1S0) and (Ω = 0+, 4s3d 1D) ↔ (Ω = 0+, 4s2 1S0) in the Ca-He quasimolecule. As a comparison with the experimental results obtained under gas-cell conditions, we average the spectra under study over the impact parameters and the Maxwellian distribution of the colliding particles. For the asymptotically forbidden Ca(4s2 1S0 → 4s3d 1D2)-He quasimolecular transition, the first comparison between the calculated spectral line profile and the experimental one is made not only in shape, but also in absolute value. We clarify the physical mechanisms for the initiation of a spectral line satellite at the position of the forbidden atomic transition being investigated. The reasonable agreement confirms that the spectral lineshapes of the asymptotically forbidden transitions are formed due to the interplay between the structure of the potential energy curves involved and the strong dependence of the radiative width.
AB - We perform calculations using the semiclassical Fourier approach for quasimolecular spectra induced by thermal collisions of the excited calcium atom (Ca*) with the helium atom in the ground state (He) for the following quasimolecular optical transitions: (Ω = 0+, 4s4p 1P) ↔ (Ω = 0+, 4s2 1S0) and (Ω = 0+, 4s3d 1D) ↔ (Ω = 0+, 4s2 1S0) in the Ca-He quasimolecule. As a comparison with the experimental results obtained under gas-cell conditions, we average the spectra under study over the impact parameters and the Maxwellian distribution of the colliding particles. For the asymptotically forbidden Ca(4s2 1S0 → 4s3d 1D2)-He quasimolecular transition, the first comparison between the calculated spectral line profile and the experimental one is made not only in shape, but also in absolute value. We clarify the physical mechanisms for the initiation of a spectral line satellite at the position of the forbidden atomic transition being investigated. The reasonable agreement confirms that the spectral lineshapes of the asymptotically forbidden transitions are formed due to the interplay between the structure of the potential energy curves involved and the strong dependence of the radiative width.
KW - NONADIABATIC TRANSITIONS
KW - ABSORPTION
KW - EMISSION
KW - WINGS
KW - LINE
UR - http://www.scopus.com/inward/record.url?scp=0035963280&partnerID=8YFLogxK
U2 - 10.1088/0953-4075/34/12/301
DO - 10.1088/0953-4075/34/12/301
M3 - Article
AN - SCOPUS:0035963280
VL - 34
SP - 2301
EP - 2312
JO - Journal of the European Optical Society Part B: Quantum Optics
JF - Journal of the European Optical Society Part B: Quantum Optics
SN - 0953-4075
IS - 12
ER -
ID: 28477280