Lifetime of the First Excited State of B10

S. D. Bloom, C. M. Turner, and D. H. Wilkinson
Phys. Rev. 105, 232 – Published 1 January 1957
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Abstract

We have measured the mean lifetime of the first excited state of B10 at 0.72 Mev as 1.05±0.10 mμsec by bombarding B10 with pulsed beams of 3-Mev protons and studying the delayed emission of gamma rays. This figure is a little longer than that given by earlier measurements of the E2 lifetime using recoil methods. The result is compared with preliminary shell model calculations and it is concluded that it is probably inconsistent with those calculations, at least if one restricts oneself to the value of the intermediate coupling parameter that gives good agreement with the experimental level scheme. It seems that some collective motion must be envisaged even in so light a nucleus as B10.

  • Received 25 September 1956

DOI:https://doi.org/10.1103/PhysRev.105.232

©1957 American Physical Society

Authors & Affiliations

S. D. Bloom*, C. M. Turner, and D. H. Wilkinson

  • Brookhaven National Laboratory, Upton, New York

  • *Present address: Cavendish Laboratory, Cambridge, England.
  • Permanent address: Cavendish Laboratory, Cambridge, England. This work was performed while this author was Visiting Physicist at Brookhaven National Laboratory during the summer of 1956.

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Vol. 105, Iss. 1 — January 1957

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