Stimulation of interstellar oh by phonons

ABSTRACT THE attempts which have so far been made to explain the observed features of the interstellar OH molecule cannot be regarded as entirely successful1. The most interesting

observations are the OH sources in emission, where it is clear that some form of maser action is involved. Any theoretical model to explain these data must provide a mechanism for producing

stimulated emission while also accounting for the formation and stability of the OH molecule under the conditions prevailing in the emitting region. An optical pumping device involving

absorption and re-emission at λ=3080 Å in the X2II→A2Σ+ bands was suggested by Perkins _et al._2, but this process has recently been criticized by Solomon3. It has been argued3 that the OH

would be dissociated faster than it would be pumped by ultraviolet absorption. Solomon has in fact suggested that OH may form in the upper level of the Λ doublet by inverse pre-dissociation

reactions taking place at a few thousand degrees Kelvin; but the possibility of other formation and stimulation mechanisms cannot be ruled out at the present moment. Access through your

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BEING VIEWED BY OTHERS PAULI BLOCKING OF STIMULATED EMISSION IN A DEGENERATE FERMI GAS Article Open access 29 October 2022 PROPAGATION OF OPTICALLY TUNABLE COHERENT RADIATION IN A GAS OF

POLAR MOLECULES Article Open access 19 October 2020 RAMAN-PHONON-POLARITON CONDENSATION IN A TRANSVERSELY PUMPED CAVITY Article Open access 17 October 2024 REFERENCES * Robinson, B. J., and

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of Theoretical Astronomy, University of Cambridge, N. C. WICKRAMASINGHE Authors * N. C. WICKRAMASINGHE View author publications You can also search for this author inPubMed Google Scholar

RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE WICKRAMASINGHE, N. Stimulation of Interstellar OH by Phonons. _Nature_ 217, 1131–1132 (1968).

https://doi.org/10.1038/2171131a0 Download citation * Received: 19 February 1968 * Revised: 29 February 1968 * Issue Date: 23 March 1968 * DOI: https://doi.org/10.1038/2171131a0 SHARE THIS

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