Two-deuteron radiative capture: Polarization observables at Ed≤15 MeV

J. L. Langenbrunner, H. R. Weller, and D. R. Tilley
Phys. Rev. C 42, 1214 – Published 1 October 1990
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Abstract

Measurements of the H2(d→,γ)4He cross section σ(θ), the vector analyzing power Ay(θ), and the tensor analyzing power Ayy(θ) have been obtained at Ed(lab)=14.7 and 1.2 MeV and Ed(lab)≤0.8 MeV; the spherical tensor analyzing power T20(θ) was also measured at Ed(lab)=14.7 MeV. Ay(130°) and Ayy(130°) were measured at eight bombarding energies between Ed(lab)=0.8 and 14.7 MeV and T20(130°) at ten energies between Ed(lab)=5.4 and 14.7 MeV. A transition-matrix element analysis is performed by fitting to the available angular distribution data at Ed(lab)≤0.8 MeV and at Ed(lab)=1.2 and 14.7 MeV. The data are compared to the results of a multichannel resonating group model (MCRGM) calculation. The MCRGM model includes the tensor force in calculating both the continuum and bound states and provides a fairly good description of the data, especially above Ed=5 MeV. This calculation predicts a D-state probability in He4 arising from the relative motion between the two deuterons of PD=2.2%.

  • Received 3 November 1989

DOI:https://doi.org/10.1103/PhysRevC.42.1214

©1990 American Physical Society

Authors & Affiliations

J. L. Langenbrunner and H. R. Weller

  • Duke University and Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27706

D. R. Tilley

  • North Carolina State University, Raleigh, North Carolina 27695
  • Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27706

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Issue

Vol. 42, Iss. 4 — October 1990

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