Electronic spectra of astrophysically interesting cations

The electronic spectra of polyacetylene cations were recorded at 20K in the laboratory in an ion trap instrument. These can then be compared with diffuse interstellar band (DIB) absorptions. Examination of recently published data shows that the attribution of a weak DIB at ∼506.9 nm to diacetylene c...

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Bibliographic Details
Main Authors: Maier, John P, Rice, Corey A, Mazzotti, Fabio J, Johnson, Anatoly
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION SPECTRA
ASTROPHYSICS
ATOMIC AND MOLECULAR PHYSICS
CATIONS
COMPARATIVE EVALUATIONS
Electron states
Electronic spectra
ELECTRONIC STRUCTURE
EXCITED STATES
Interstellar
LEVEL WIDTHS
POLYACETYLENES
TEMPERATURE RANGE 0013-0065 K
TRAPS
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Summary:The electronic spectra of polyacetylene cations were recorded at 20K in the laboratory in an ion trap instrument. These can then be compared with diffuse interstellar band (DIB) absorptions. Examination of recently published data shows that the attribution of a weak DIB at ∼506.9 nm to diacetylene cation is not justified. Study of the higher excited electronic states of polyacetylene cations shows that their widths can still be sufficiently narrow for consideration as DIB carriers.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4906681