Abstract
VARIOUS pumping mechanisms depending on the absorption of radiation have been proposed as competent to invert the Λ-doublet of the 2II3/2 ground state of the OH molecule and so to explain the origin of anomalous 18 cm emission from galactic OH as stimulated emission. I argue here that the available power of radiation is likely to be too small for the purpose.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Cook, A. H., Mon. Not. Roy. Astro. Soc. (in the press).
Moran, J. M., Burke, B. F., Barrett, A. H., Rogers, A. E. E., Ball, J. A., Carter, J., and Cudaback, D. A., Astrophys. J. Lett., 152, 97 (1968).
Cook, A. H., Nature, 210, 611 (1966).
Litvak, M. M., McWhorter, A. L., Meeks, M. L., and Zeiger, H. J., Phys. Rev. Lett., 17, 821 (1966).
Robinson, B. J., and McGee, R. X., Ann. Rev. Astronom. Astrophys., 5, 183 (1967).
Mathews, W. G., Astrophys. J., 142, 1120 (1965).
Kleinmann, D. E., and Low, F. J., Astrophys. J. Lett., 149, 1 (1967).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
COOK, A. Pumping Mechanisms for Maser Action in Galactic OH. Nature 220, 44–46 (1968). https://doi.org/10.1038/220044a0
Received:
Issue Date:
DOI: https://doi.org/10.1038/220044a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
