Campbell, Ewen and Holz, Mathias and Maier, John P.. (2017) Gas phase absorption of C702+ below 10 K: astronomical implications. Astrophysical Journal, 835 (2). p. 4.
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Official URL: http://edoc.unibas.ch/58298/
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Abstract
The electronic spectrum of the fullerene dication C702+ has been measured in the gas phase at low temperature in a cryogenic radiofrequency ion trap. The spectrum consists of a strong origin band at 7030 Å and two weaker features to higher energy. The bands have FWHMs of 35 Å indicating an excited state lifetime on the order of one-tenth of a picosecond. Absorption cross-section measurements yield (2 ± 1) × 10−15 cm2 at 7030 Å. These results are used to predict the depth of diffuse interstellar bands (DIBs) due to the absorption by C702+. At an assumed column density of 2 × 1012 cm−2 the attenuation of starlight at 7030 Å is around 0.4% and thus the detection of such a shallow and broad interstellar band would be difficult. The electronic spectrum of C602+ shows no absorptions in the visible. Below 4000 Å the spectra of C60, C60+ and C602+ are similar. The large intrinsic FWHM of the features in this region, ~200 Å for the band near 3250 Å, make them unsuitable for DIB detection.
Faculties and Departments: | 05 Faculty of Science > Departement Chemie > Former Organization Units Chemistry > Physikalische Chemie (Maier) |
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UniBasel Contributors: | Maier, John Paul and Campbell, Ewen and Holz, Mathias |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | IOP Publishing |
ISSN: | 0004-637X |
e-ISSN: | 1538-4357 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
Language: | English |
Identification Number: | |
edoc DOI: | |
Last Modified: | 05 Jan 2018 12:58 |
Deposited On: | 05 Jan 2018 12:58 |
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