Study of the Reaction Ne20(α, αγ)Ne20

W. W. Eidson and R. D. Bent
Phys. Rev. 128, 1312 – Published 1 November 1962
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Abstract

Particle-gamma coincidence spectra of the reaction Ne20(α, αγ)Ne20 provide evidence for the existence of two, new, gamma-emitting levels in Ne20. A new level at 7.93 MeV is observed to decay by gamma emission to the 4.97-MeV (2) level; a new level at 5.88 MeV is observed to decay to the 4.25-MeV (4+) level. Tentative spin-parity assignments are 3+ for the 5.88-MeV level and 1+, 2, 3+, or 4 for the 7.93-MeV level. Evidence is seen for the recently discovered level at 7.02 MeV (4). The data suggest a considerably larger value of ΓγΓ for the 5.63-MeV (3) level than that previously reported. Angular distribution measurements of elastic and inelastic alpha-particle groups are compared with current direct-interaction theory. The production of states of Ne20 with JL through inelastic alpha-particle scattering suggests a fairly strong spinorbit interaction between the orbital angular momentum of the incident alpha particle and the spin of one (or more) target nucleons. Possible collective model interpretations of the Ne20 level structure are suggested.

  • Received 25 June 1962

DOI:https://doi.org/10.1103/PhysRev.128.1312

©1962 American Physical Society

Authors & Affiliations

W. W. Eidson and R. D. Bent

  • Department of Physics, Indiana University, Bloomington, Indiana

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Issue

Vol. 128, Iss. 3 — November 1962

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