Two-body photodisintegration of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> between 150 and 350 MeV

D. I. Sober; Hall Crannell; B. M. K. Nefkens; W. J. Briscoe; D. H. Fitzgerald; R. Goloskie; W. W. Sapp, Jr

doi:10.1103/PhysRevC.28.2234

Two-body photodisintegration of ${}^{3}{He}$ between 150 and 350 MeV

D. I. Sober, Hall Crannell, B. M. K. Nefkens, W. J. Briscoe, D. H. Fitzgerald, R. Goloskie, and W. W. Sapp, Jr.

Phys. Rev. C 28, 2234 – Published 1 December 1983

Abstract

Differential cross sections for ${}^{3}{He} (γ, d) {}^{1}H$ for incident energies between 150 and 350 MeV at center-of-mass proton angles near 60° and 90° have been measured with an absolute uncertainty of less than 6%. The experiment used a single-arm spectrometer, a gas target, and an uncollimated bremsstrahlung beam. The results are in good agreement with new measurements of the time-reversed reaction, ${}^{2}H (p, {}^{3}{He}) γ$ , giving no evidence for a violation of time-reversal invariance. The differential cross sections decrease smoothly with energy and show only a small contribution from the $Δ (1232)$ resonance.

NUCLEAR REACTIONS ${}^{3}{He} (γ, d) {}^{1}H$ , $E_{0} = 150 - 350$ MeV; measured $\frac{d σ}{d Ω}$ at $θ_{p} (c . m .) ≅ 60 °, 90 °$ ; tested detailed balance and time-reversal invariance.

Received 10 August 1983

DOI:https://doi.org/10.1103/PhysRevC.28.2234

Authors & Affiliations

D. I. Sober and Hall Crannell^*

Department of Physics, The Catholic University of America, Washington, D.C. 20064

B. M. K. Nefkens

Department of Physics, University of California, Los Angeles, California 90024

W. J. Briscoe^†

Department of Physics, University of California, Los Angeles, California 90024 and Department of Physics, George Washington University, Washington, D.C. 20052

D. H. Fitzgerald^†

Department of Physics, University of California, Los Angeles, California 90024 and Los Alamos National Laboratory, Los Alamos, New Mexico 87545

R. Goloskie

Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01609

W. W. Sapp, Jr.

William H. Bates Linear Accelerator, Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

^*On leave of absence at the National Science Foundation, Washington, D.C. 20550.
^†Present address.

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Vol. 28, Iss. 6 — December 1983

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