Photodissociation yields of CS2 at 1060-1520 AA
Abstract
Photoabsorption and fluorescence cross sections of CS2 were measured in the 1060-1520 A region using synchrotron radiation in order to provide information needed for modeling the CS abundance in the interstellar medium. The absorption in the 1060-1200 A region is smooth and continuous, except for the presence of a strong absorption band at 1117 A, while for wavelengths longer than 1200 A, the absorption spectrum shows the structure of Rydberg states. The fluorescence in the 1900-3000 A region begins to appear at 1335 A, and is mainly the CS(A 1Pi-Chi 1Sigma +) transition in the 2400-2800 A region. The fluorescence in the 1900-8000 A region begins to appear at 1490 A, and, in addition to the previous transition, is composed of the transitions of S(1S0-3P1) at 4589 A and of CS(d 3 Delta, a-prime 3Sigma +, and a 3Pi-Chi 1Sigma +) at 3000-4000 A. The quantum yields for the production of fluorescence are determined to have maxima of 13 and 7.5% at 1235 A for the fluorescence in the 1900-8000 and 1900-3000 A regions, respectively.
- Publication:
-
Journal of Physics B Atomic Molecular Physics
- Pub Date:
- December 1982
- DOI:
- 10.1088/0022-3700/15/23/022
- Bibcode:
- 1982JPhB...15.4403D
- Keywords:
-
- Carbon Disulfide;
- Fluorescence;
- Photodissociation;
- Ultraviolet Absorption;
- Absorption Cross Sections;
- Absorption Spectra;
- Interstellar Matter;
- Optical Transition;
- Quantum Efficiency;
- Atomic and Molecular Physics