Phys. Rev. 119, 2000–2004 (1960)Heavy Isotope Abundances in Mike Thermonuclear DeviceReceived 2 May 1960; published in the issue dated September 1960 The November 1, 1952 thermonuclear explosion ("Mike") produced all of the uranium isotopes U239, U240,...U255 through multiple neutron capture by U238. The long-lived products of successive β- decays from these isotopes were measured mass spectrometrically and radiometrically. The logarithms of the abundances decline smoothly with increasing mass number; the even-mass abundances slightly exceed the geometric mean of adjacent odd-mass abundances. Some nuclear properties of neutron-rich heavy nuclides, not subject to ordinary investigation are inferred. © 1960 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.119.2000
DOI:
10.1103/PhysRev.119.2000
PACS:
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