Lifetime measurements of the E 1Π, υ=0 and υ=1 states of 12C16O, 13C16O, and 13C18O

被引：31

作者：

Cacciani, P

Lynga, C

L'Huillier, A

Wahlstrom, CG

Ubachs, W

Hinnen, PC

机构：

[1] Lab Aimee Cotton, F-91405 Orsay, France

[2] Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands

[3] Lund Inst Technol, Dept Phys, S-22100 Lund, Sweden

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 499卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ISM; molecules; molecular data; techniques; spectroscopic;

D O I：

10.1086/311378

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a laboratory investigation using tunable picosecond lasers in a pump-probe configuration, lifetimes of the E (II)-I-1, v = O and v = 1 states of CO are experimentally determined. For E (II)-I-1, v = 1, the lifetime is found to vary significantly for the isotopomers. Combining the data with existing oscillator strengths, predissociation probabilities within the range of 93.6%-98.64% result for (CO)-C-12-O-16, (CO)-C-13-O-16, and (CO)-C-13-O-18 in, the case of the E (II)-I-1, v=1 state, which is the state that predominantly influences the isotopic fractionation of CO in interstellar clouds.

引用

页码：L223 / L226

页数：4