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Infrared, Submillimeter, and RadioAstronomy Program Astophysics DivisionThe object of my research for the NASA grant NAGW-4769 was to observe infrared spectra of molecular ions with special astrophysical interest in plasmas both in the laboratory and in space. Progress made during the period from September 1995 to September 1996 is summarized in the following: 1. Detection of Interstellar H3(+) The discovery of interstellar H3(+) through its mid-infrared absorption spectrum was by far the most inspiring development during this fiscal year. H3(+), the simplest stable polyatomic system, has been postulated to play the central role in the ion-neutral reaction scheme of interstellar chemistry, but its presence had not been directly observed in spite of intensive searches by several groups. 2. Observation of High Revibrational States of H3(+). The initial discovery of H3(+) in the Jovian aurora region was made through the identification of the 2(nu)(sub 2)(sup 2) approaches O overtone band indicating the population of H3(+) in high revibration state. 3. Observation of Ortho-Para H3(+) selection rules in plasma chemistry. Celection rules that relate quantum states before and ufter various processes are fascinating subject based on the symmetry argument. 4. Spectroscopy of other ions. Spectroscopy of carbocations ch3(+), CH2(+), C2H3(+) and C2H2(+) has been continued.
Document ID
19980004614
Acquisition Source
Headquarters
Document Type
Contractor Report (CR)
Authors
Oka, Takeshi (Chicago Univ. Chicago, IL United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1996
Subject Category
Astronomy
Report/Patent Number
NAS 1.26:206502
NASA/CR-97-206502
Funding Number(s)
CONTRACT_GRANT: NAGw-4769
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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