Gamma Rays from Neutron Capture in Helium-3 and Deuteron Capture in Deuterium

R. W. Zurmühle, W. E. Stephens, and H. H. Staub
Phys. Rev. 132, 751 – Published 15 October 1963
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Abstract

The gamma rays from the He3(n, γ)He4 and the D(d, γ)He4 reaction have been observed. The gamma detector, a 3-in.×4-in. NaI crystal, was surrounded by a plastic scintillator to eliminate the cosmic-ray background. A pileup rejection circuit was used to reduce the background from neutron induced reactions in the NaI. The cross section of the He3(n, γ)He4 reaction at 4 MeV is σ=5 μb/sr at 90°. The intensity ratio, I(90°I(45°)2, agrees with that expected for electric dipole radiation (ΔM=0). The D(d, γ)He4 reaction at 1.35 MeV has a cross section σ=2×1033 cm2/sr at 45°.

  • Received 10 June 1963

DOI:https://doi.org/10.1103/PhysRev.132.751

©1963 American Physical Society

Authors & Affiliations

R. W. Zurmühle and W. E. Stephens

  • University of Pennsylvania, Philadelphia, Pennsylvania

H. H. Staub

  • University of Zürich, Zürich, Switzerland

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Issue

Vol. 132, Iss. 2 — October 1963

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