Neutron Polarization in the d+Tn+He4 Reaction at 30° from 3 to 15 MeV

G. S. Mutchler, W. B. Broste, and J. E. Simmons
Phys. Rev. C 3, 1031 – Published 1 March 1971
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Abstract

An experimental study has been made of neutron polarization from the T(d,n)He4 reaction at 30° lab as a function of incident deuteron energy. A liquid-helium polarimeter was employed for this purpose with a 90° spin-precession solenoid. Measurements have been made in two ways, with greatest emphasis placed on the use of the backward reaction, D(t,n)He4, for a range of triton energies between 4.5 and 19.5 MeV. Equivalent c.m. conditions are obtained for Et=32Ed, with neutrons emerging in the vicinity of 135° lab. Under these conditions, the neutron energy is near 11 MeV over a wide range of triton energies, where the nHe analyzing power is constant and well known. Measurements were also made from the T(d,n)He4 reaction directly at 30° for a range of deuteron energies between 5 and 15 MeV. The measured polarizations varied from 0.03 at 3-MeV to 0.69 at 13-MeV equivalent deuteron energy. Comparisons are made with prior data. The method also allows extraction of values of the nHe analyzing power for neutron energies between 21 and 29 MeV at 75 and 113° lab.

  • Received 2 October 1970

DOI:https://doi.org/10.1103/PhysRevC.3.1031

©1971 American Physical Society

Authors & Affiliations

G. S. Mutchler*,‡, W. B. Broste†,‡, and J. E. Simmons

  • Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87544

  • *Present address: Rice University, Houston, Texas 77001.
  • Associated Western Universities Fellow from University of Wyoming.
  • Work performed under the auspices of the U. S. Atomic Energy Commission.

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Vol. 3, Iss. 3 — March 1971

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