Measurement of low-lying states in B9

M. A. Tiede, K. W. Kemper, N. R. Fletcher, D. Robson, D. D. Caussyn, S. J. Bennett, J. D. Brown, W. N. Catford, C. D. Jones, D. L. Watson, and W. D. M. Rae
Phys. Rev. C 52, 1315 – Published 1 September 1995
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Abstract

A measurement of low-lying states in B9 was conducted using the Li6(6Li,t)9B reaction at a beam energy of 56 MeV. The particles resulting from the decay of B9 into Be8 + p were detected with position sensitive detectors, and relative energy spectra were obtained from the data using the technique of resonant particle decay spectroscopy. This technique provided a very low background, and the ability to separate the B9 states that decay by Be8 + p from those that decay by Li5 + α. Results show that a significant portion of the measured spectrum below ≊ 1.5 MeV cannot be explained by the known states which suggests that these counts arise from the mirror of the 1.68 MeV 1/2+ state of Be9. It was also shown that the recently observed 1/2 state decays via the p+8Be channel.

  • Received 15 December 1994

DOI:https://doi.org/10.1103/PhysRevC.52.1315

©1995 American Physical Society

Authors & Affiliations

M. A. Tiede, K. W. Kemper, N. R. Fletcher, and D. Robson

  • Department of Physics, Florida State University, Tallahassee, Florida 32306

D. D. Caussyn

  • Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405

S. J. Bennett

  • School of Physics and Space Research, University of Birmingham, Birmingham B15 2TT, United Kingdom

J. D. Brown

  • Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544

W. N. Catford

  • Department of Physics, University of Surrey, Guildford GU2 5XH, United Kingdom

C. D. Jones and D. L. Watson

  • University of York, York YO1 5DD, United Kingdom

W. D. M. Rae

  • Department of Physics, University of Oxford, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH, United Kingdom

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Vol. 52, Iss. 3 — September 1995

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