THE UNIDENTIFIED INTERSTELLAR INFRARED BANDS - PAHS AS CARRIERS

被引：100
|
作者：
SCHLEMMER, S [1 ]
COOK, DJ [1 ]
HARRISON, JA [1 ]
WURFEL, B [1 ]
CHAPMAN, W [1 ]
SAYKALLY, RJ [1 ]
机构：
[1] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720
来源：
SCIENCE | 1994年 / 265卷 / 5179期
关键词：
D O I：
10.1126/science.11539830
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Infrared emission spectra of gas-phase naphthalene and pyrene have been measured in the range of 3 to 7.5 micrometers with ultraviolet laser desorption-excitation and a spectroscopic technique featuring single-photon counting in the infrared. The spectra were compared with the unidentified infrared emission bands that are observed in many astronomical objects. Marked discrepancies between those observations and the laboratory emission spectra in the wavelengths and relative intensities of principal spectral features led to the conclusion that small neutral unsubstituted polycyclic aromatic hydrocarbons cannot be the carriers of the unidentified infrared emission bands.
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收藏
页码：1686 / 1689
页数：4
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