Angular Distribution and Correlation Studies of Be9, B10, and Mg24 (d, p) Reactions

S. A. Cox and R. M. Williamson
Phys. Rev. 105, 1799 – Published 15 March 1957
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Abstract

(d, p) angular distributions have been measured along with (p, γ) correlations in Be9, B10, and Mg24 in order to test the applicability of stripping correlation theory and assign tentative quantum numbers. Deuteron energies were 2.5 to 4 Mev. All correlations exhibited the predicted deuteron energy independence and approximate angular symmetry in the (d, p) plane at energies above 3.5 Mev. The Be9 correlation was shown to be isotropic to ±7% in the plane perpendicular to the axis of the recoil nucleus. The observation of a (d, p) stripping peak 2 or 3 times the minimum yield is not a sufficient criterion for the observation of a correlation which is independent of deuteron energy. All correlations were of the form 1+Acos2θ (gamma, recoil nucleus). The observed A's were -0.50, 0.00, +0.50, -0.40, for Be10* (3.37 Mev), B11* (4.46 Mev), B11* (6.76 Mev), Mg25* (3.40 Mev), respectively. All uncertainties in A's were ±0.05. Spin ½ is ruled out for Mg25* (3.40 Mev). The Be9 anisotropy is within 15% of one extreme of theoretically possible anisotropies. The incoming channel spin mixing ratio found in Be9 can be gotten by assuming pure LS coupling and a P23 Be10* level. The spin 92 is unlikely for the B11* (4.46 Mev) level, while the spin 32 is ruled out and 92 is unlikely for the B11* (6.76 Mev) level.

  • Received 5 November 1956

DOI:https://doi.org/10.1103/PhysRev.105.1799

©1957 American Physical Society

Authors & Affiliations

S. A. Cox* and R. M. Williamson

  • Duke University, Durham, North Carolina

  • *Now at Argonne National Laboratories, Lemont, Illinois.

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Issue

Vol. 105, Iss. 6 — March 1957

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