Proposed Measurements of Photoabsorption Cross Sections of Solar System and Cosmic Gases Under In-Situ Conditions

南加州大学法官约翰·考德威尔·吴博士、贾奇和考德威尔将继续一项研究计划，对行星大气、彗星、星云和星际云中感兴趣的分子随温度变化的光吸收截面进行实验室测量。具体地说，他们将测量1)一氧化碳的4PG截面、基本禁带跃迁和准连续截面；2)甲烷、二氧化碳和水在它们各自的吸收起点附近极小的光吸收截面；3)在最丰富的大气分子如氢、氮、二氧化碳和甲烷存在的情况下，压力对吸收分子的影响；以及4)苯和硫化氢。

Chung-Yung Wu Darrell Judge John Caldwell University of Southern California Drs. Wu, Judge, and Caldwell will continue a research program of laboratory measurements of temperature dependent photoabsorption cross sections of molecules of interest in the study of planetary atmospheres, comets, nebulae, and interstellar clouds. Specifically they will measure temperature dependent cross sections of 1) the 4PG, the underlying forbidden transitions and the pseudo-continuum cross sections of carbon monoxide; 2) the extremely small photoabsorption cross sections of methane, carbon dioxide, and water near their respective absorption onsets; 3) the pressure effects on the absorbing molecule in the presence of the most abundant atmospheric molecules such as hydrogen, nitrogen, carbon dioxide, and methane; and 4) benzene and hydrogen sulfide.