A new kind of natural radioactivity

Details A new kind of natural radioactivity A new kind of natural radioactivity

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.307..245r&link_type=abstract

Nature (ISSN 0028-0836), vol. 307, Jan. 19, 1984, p. 245-247.

Other

207

Carbon 14, Heavy Ions, Ion Emission, Radioactive Decay, Radium Isotopes, Alpha Decay, Particle Energy, Q Values, Radiation Counters

Scientific paper

A solid-state counter telescope has been used to identify the charge of the particle heavier than the alpha particle which is emitted in the natural decay of Ra-223. For the sake of convenience the radioactive source used is Ac-227, with which Ra-223 is in equilibrium. Particles identifiable as carbon ions are observed; from their energy and emission rate, they are found to be C-14 rather than other carbon isotopes. The branching ratio for emission of C-14 nuclei relative to alpha particles from Ra-223 is 8.5 + or - 2.5 x 10 to the -10th, corresponding to a reduced width smaller by a factor of about 100,000 to a million.

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