Pair decay of the 7.65-MeV level of C12

David E. Alburger
Phys. Rev. C 16, 2394 – Published 1 December 1977
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Abstract

The ground-state nuclear pair decay branch from the 7.65-MeV 0+ level in C12 has been measured using the reaction C12(p,p)C12 on a 3.5-mg/cm2 thick carbon target at Ep=10.5 MeV together with a magnetic pair spectrometer. For normalization the internal pair line due to the 4.44-MeV E2 transition from the first-excited state of C12 was used. In separate measurements the corresponding relative populations of the 7.65- and 4.44-MeV states were determined. The angular distribution of the 4.44-MeV γ rays was also measured in order to obtain the correction to the spectrometer efficiency due to nuclear alignment. A pair decay branch of (7.1 ± 0.8) × 106 was obtained for the 7.65-MeV level in agreement with, but somewhat more accurate than previous measurements.

NUCLEAR STRUCTURE C12, 7.65-MeV state; measured ΓπΓ; deduced Γrad.

  • Received 9 August 1977

DOI:https://doi.org/10.1103/PhysRevC.16.2394

©1977 American Physical Society

Authors & Affiliations

David E. Alburger

  • Brookhaven National Laboratory, Upton, New York 11973

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Issue

Vol. 16, Iss. 6 — December 1977

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