Neutral N-14 in the interstellar medium

Details Neutral N-14 in the interstellar medium Neutral N-14 in the interstellar medium

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.283..360k&link_type=abstract

Nature, vol. 283, Jan. 24, 1980, p. 360, 361.

Physics

25

Interstellar Matter, Line Spectra, Microwave Spectra, Nitrogen Isotopes, Absorption Spectra, Spectrum Analysis

Scientific paper

The transition frequencies of the hyperfine structure sublevels of atomic nitrogen lie in the decametric waveband and can be observed in the form of narrow spectral lines. The N-14 ground state is split into three sublevels, F = 5/2, 3/2, and 1/2. The Einstein coefficients given in the present paper were calculated from improved values of the line intensities observed by Kontorovich et al. (1964). An attempt to detect the N-14 absorption line for extended cosmic objects, using the UTR-2 radio telescope, is described. It proved possible to detect the 26.13 MHz absorption line in the signal from Cas A.

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