Si29(α, n)S32 reaction from 2.15 to 5.25 MeV bombarding energy

M. Balakrishnan, M. K. Mehta, A. S. Divatia, and S. Kailas
Phys. Rev. C 11, 54 – Published 1 January 1975
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Abstract

Levels in the compound nucleus S33 have been investigated by measuring the reaction cross section for the reaction Si29(α, n)S32 for incident α energies from 2.15 to 5.25 MeV, mostly in steps of 2.5 keV, using a 4π-geometry neutron counter. One hundred and thirty-four resonances have been identified. The reciprocity theorem has been used to calculate the total cross section for the inverse reaction S32(n, α)Si29. Total widths have been determined for 107 resonances, and partial widths Γα, Γn and corresponding reduced widths γα2, γn2 have been extracted for 19 cases where spin values are known. Statistical strength function analysis of the cross section under the excitation curve gave the averaged α particle strength function value as S¯α=0.067±0.012 for this reaction.

NUCLEAR REACTIONS Si29(α, n), E=2.155.25 MeV; measured σ(E); S33 levels, deduced Γα, Γn, S. σ S32(n, α) reaction, reciprocity theorem; statistical analysis, deduced S¯α.

  • Received 25 June 1974

DOI:https://doi.org/10.1103/PhysRevC.11.54

©1975 American Physical Society

Authors & Affiliations

M. Balakrishnan, M. K. Mehta, A. S. Divatia, and S. Kailas

  • Van de Graaff Laboratory, Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay 400 085, India

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Vol. 11, Iss. 1 — January 1975

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