期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1981
卷号：78
期号：2
页码：702-705
DOI：10.1073/pnas.78.2.702
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The visible absorption spectrum of liquid ethylene at {approx} 108 K from 5500 A to 7200 A was measured by using a pulsed tunable dye laser, immersed-transducer, gated-detection opto-acoustic spectroscopy technique. The absorption features show the strongest band with an absorption coefficient of {approx}2 x 10-2 cm-1 and the weakest band with an absorption coefficient of {approx}1 x 10-4 cm-1. Proposed assignments of the observed absorption peaks involve combinations of overtones of local and normal modes of vibration of ethylene.
关键词：optical spectra of condensed gases ; opto-acoustic spectroscopy
