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2000ApJ...542..894B - Astrophys. J., 542, 894-897 (2000/October-3)

H, C, N, and O isotopic substitution studies of the 2165 wavenumber (4.62 micron) ``XCN'' feature produced by ultraviolet photolysis of mixed molecular ices.

BERNSTEIN M.P., SANDFORD S.A. and ALLAMANDOLA L.J.

Abstract (from CDS):

To better understand the chemical species that gives rise to the 2165 cm–1 (4.62 µm) ``XCN'' absorption feature seen toward embedded protostars such as W33A, we have performed laboratory studies using deuterium (2H) isotopic labeling. We report the observation of a small but significant deuterium isotope shift for the ``XCN'' peak which demonstrates that the atomic motion(s) causing the ``XCN'' band in the laboratory samples must involve hydrogen. We also report the results of 13C, 15N, and 18O labeling experiments that are consistent with previously reported values.

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Journal keyword(s): Infrared: ISM: Lines and Bands - ISM: Lines and Bands - ISM: Molecules - Methods: Laboratory

Simbad objects: 1

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