A search for the J = 1→0 transition of 14CO

Phillips, J. P. and White, Glenn J. (1983). A search for the J = 1→0 transition of 14CO. Monthly Notices of the Royal Astronomical Society, 202 pp. 265–268.

URL: http://adsabs.harvard.edu/full/1983MNRAS.202..265P

Abstract

We have observed seven galactic sources in the J=1→0 transition of 14CO and find 2σ upper limits for the ratio 14C/12C which are between 1.2 x 10-5 and 4.4 x 10-5 in five star-formation zones, and of order 10-4 and greater for the supernovae remnants S147 and IC443.

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