The C13[He3,Be8(g.s.)]Be8(g.s.) Reaction

K. S. Jayaraman and H. D. Holmgren
Phys. Rev. 172, 1015 – Published 20 August 1968
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Abstract

The differential cross sections for the C13[He3, Be8(g.s.)]Be8(g.s.) reaction have been measured as a function of angle at bombarding energies of 3.30, 5.00, and 5.75 MeV, and as a function of the bombarding energy over the range extending from 2.50 to 5.00 MeV at a laboratory angle of 40°. The reaction exhibits a pronounced resonance at about 5.6 MeV corresponding to an excited state of O16 at an excitation energy of 16.75 MeV. The angular distribution on the resonance suggests an assignment of Jπ=2+. The total off-resonance cross section for the reaction is surprisingly large: 0.18 mb at 3.30 MeV and 0.37 mb at 5.00 MeV. The behavior of the off-resonance differential cross section suggests the possibility of direct reaction. The angular distributions at 3.30 and 5.00 MeV have been fitted with a distorted-wave Born-approximation calculation in which a five-nucleon system was assumed to be transferred from C13 to He3 as a point particle. The gross approximations which had to be employed in the calculation do not allow a meaningful spectroscopic factor to be extracted. The reaction, however, plays a significant part in the interaction of He3 with C13.

  • Received 22 March 1968

DOI:https://doi.org/10.1103/PhysRev.172.1015

©1968 American Physical Society

Authors & Affiliations

K. S. Jayaraman and H. D. Holmgren

  • Physics Department, University of Maryland, College Park, Maryland

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Issue

Vol. 172, Iss. 4 — August 1968

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