Very low temperature spectroscopy: The pressure broadening coefficients for CO-He between 4.3 and 1.7 K
Very low temperature spectroscopy: The pressure broadening coefficients for CO-He between 4.3 and 1.7 K
复制标题
极低温光谱：CO-He 4.3 至 1.7 K 之间的压力展宽系数
DOI：
--
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
F. D. Lucia
中科院分区：
文献类型：
--
作者：
D. Willey;R. Crownover;D. Bittner;F. D. Lucia
在4.2 ~ 1.9 K范围内，用一种最新开发的基于低温池碰撞冷却的技术测量了CH3F-He体系的压力加宽参数和截面。在4.2 K时，J=1 - 2相变的K=0和K=1组分的截面分别为75.2和66.6 A2，在1.9 K时分别为55.5和54.5 A2。4.2 K时的截面比300 K时大50%左右。这些结果与早期CO-He体系的实验和理论结果进行了比较。
Pressure broadening parameters and cross sections for the CH3F–He system have been measured between 4.2 and 1.9 K by means of a recently developed technique based on collisional cooling in a cryogenic cell. The cross sections for the K=0 and K=1 components of the J=1–2 transition were found to be 75.2 and 66.6 A2, respectively, at 4.2 K and 55.5 and 54.5 A2, respectively, at 1.9 K. The cross sections at 4.2 K are about 50% larger than the 300 K values. These results are compared with earlier experimental and theoretical results obtained for the CO–He system.