Optical-optical double resonance circular polarization spectroscopy: Measurement of the disorientation cross section in 6p(2)P(1/2) Cs atoms
Yükleniyor...
Dosyalar
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
PERGAMON-ELSEVIER SCIENCE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We have measured the cross section for the disorientation of excited 6p(2)P(1/2) Cs-133 atoms by collisions with ground state Ar atoms by optical-optical double resonance circular polarization spectroscopy. Circular polarization spectra were measured for the 6s(2)S(1/2) -> 6p(2)P(1/2)-> 10s(2)S(1/2) transition. Orientation was optically induced in the P-2(1/2) state by circularly polarized light. A polarization degree was measured when two pulsed lasers were circularly polarized with the same helicities and opposite helicities, respectively. The intensity of the cascade fluorescence signal, monitored from the 9p(2)P(1/2)-> 6s(2)S(1/2) transition at 361.73 nm, was analyzed in the presence of Ar pressures ranging from 7 mbar to 133 mbar. This is a direct measure of the importance of the orientation to inelastic process in alkali rare-gas collisions. A disorientation cross section value of 9.25 (1.4) angstrom(2) was extracted from the measurements. Our result is in good agreement with the theoretical and experimental predictions within the error limits.
Açıklama
Anahtar Kelimeler
Spectroscopy, Atom-Atom Collisions, Disorientation, Inelastic Collisions, Cross Section, Radiative Transfer
Kaynak
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
113
Sayı
16
