NaH and LiH in diffuse interstellar clouds

Details NaH and LiH in diffuse interstellar clouds NaH and LiH in diffuse interstellar clouds

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..444k&link_type=abstract

Astrophysical Journal, Part 1, vol. 224, Sept. 1, 1978, p. 444-447.

Astronomy and Astrophysics

Astrophysics

30

Abundance, Interstellar Chemistry, Lithium Hydrides, Molecular Diffusion, Photodissociation, Sodium Hydrides, Chemical Reactions, Dipole Moments, Eigenvectors, Vibrational Spectra, Wavelengths

Scientific paper

It has been suggested that NaH may be detectable in diffuse interstellar clouds. The photodissociation processes of NaH are discussed, and the rate of destruction by the interstellar radiation field is calculated. In the unshielded field, the mean lifetime is about 10 years. There appears to be no efficient gas-phase mechanism for the production of NaH. If it is produced with high efficiency on grain surfaces, abundances of the order of 10 billion per sq cm can be achieved. For LiH, a similar analysis leads to an upper limit of 1 million per sq cm.

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