Measurement of the electron capture branching ratio of Be7

T. R. Donoghue, E. Sugarbaker, M. Wiescher, T. C. Rinckel, K. E. Sale, C. P. Browne, E. D. Berners, R. W. Tarara, and R. E. Warner
Phys. Rev. C 28, 875 – Published 1 August 1983
PDFExport Citation

Abstract

The value of the electron capture branching ratio of Be7 to the 478 keV state in Li7 has been measured using sources of determinable intensity fabricated by capturing in silicon surface barrier detectors Be7 recoils from the B10(p, α)Be7 reaction at Ep=1.5 MeVand 4.5 MeV Results from independent measurements utilizing detectors implanted in a scattering chamber and in the focal plane of a magnetic spectrograph are in good agreement. An absolute determination of the rate at which the 478 keV gamma rays were emitted from each source yielded a weighted average value of 10.6±0.5% for the branching ratio. This result is in agreement with the previously accepted value of 10.37±0.12% and does not support the recent suggestion that the branching ratio is appreciably larger.

RADIOACTIVITY B10(p, α)Be7, E=1.5, 4.5 MeV; enriched target; measured IBe7; silicon surface barrier detector; measured Eγ, Iγ; Ge(Li) detector; deduced branching ratio of Be7 to 478 keV state in Li7.

  • Received 10 March 1983

DOI:https://doi.org/10.1103/PhysRevC.28.875

©1983 American Physical Society

Authors & Affiliations

T. R. Donoghue, E. Sugarbaker, M. Wiescher, T. C. Rinckel, and K. E. Sale

  • Department of Physics, The Ohio State University, Columbus, Ohio 43210

C. P. Browne and E. D. Berners

  • Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556

R. W. Tarara

  • Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556

R. E. Warner

  • Department of Physics, Oberlin College, Oberlin, Ohio 44074

References (Subscription Required)

Click to Expand
Issue

Vol. 28, Iss. 2 — August 1983

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×