Mercury-206: a New Natural Radionuclide

Details Mercury-206: a New Natural Radionuclide Mercury-206: a New Natural Radionuclide

Apr 1961

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1961natur.190..427n&link_type=abstract

Nature, Volume 190, Issue 4774, pp. 427-428 (1961).

Physics

3

Scientific paper

ACCORDING to Cameron's mass formula1, the value of Qα for lead-210 (radium D) should be 3.566 MeV., which would indicate an alpha half-life of the order of 1010 years and an alpha-branching of the order of 10-9. The same source gives 1.361 MeV. for the Qβ of the hitherto unknown mercury-206, which is formed from lead-210 by alpha decay. From a closed cycle of reactions, the sum of Qα for lead-210 and Qβ of mercury-206 is found to be 5.0 MeV.; the absence of known alpha-branching in lead-210 further suggests that the Qα for lead-210 does not appreciably exceed the value mentioned above. (This has been pointed out also by Prof. I. Perlmar; private communication by Dr. K. Hyde.)

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