Gamma Rays from C13+d and the Excited States of C14

E. K. Warburton and H. J. Rose
Phys. Rev. 109, 1199 – Published 15 February 1958
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Abstract

A study has been made of the γ rays produced by the bombardment of C13 by deuterons from the Brookhaven Van de Graff accelerator with particular emphasis on the γ rays from the C13(d, p)C14 reaction. A search for C14 γ-emitting states and cascade transitions was made using a three-crystal pair spectrometer and other scintillation counters at bombarding energies up to 3.7 Mev. From coincidence measurements the assignment of the 0.81-Mev γ ray to the cascade transition between the C14 6.89- and 6.09-Mev states was confirmed and a previously unreported 0.62-Mev γ ray was assigned to the cascade transition between the C14 7.35-and 6.72-Mev states. Limits on the lifetimes of the C14 6.89-, 6.72-, and 6.1-Mev states were obtained from measurements of the Doppler shifts of the 0.81-, 6.72-, and 6.1-Mev γ rays. The lifetime limit for the 6.72-Mev state was combined with previous measurements to give a most probable assignment of Jπ=3 for the 6.72-Mev state, while the lifetime limit for the C14 6.89-Mev state showed that the 0.81-Mev transition is chiefly dipole. Measurements of the angular correlation of the 0.81-and 6.1-Mev γ rays were interpreted by expressing the angular correlation functions in terms of the relative populations of the magnetic substates of the C14 6.89-Mev state. By this method an assignment of J=0 was obtained for the C14 6.89-Mev state.

  • Received 16 October 1957

DOI:https://doi.org/10.1103/PhysRev.109.1199

©1958 American Physical Society

Authors & Affiliations

E. K. Warburton and H. J. Rose*

  • Brookhaven National Laboratory, Upton, New York

  • *Guest Physicist at Brookhaven National Laboratory on a fellowship of Deutsche Forschungsgemeinschaft.

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Issue

Vol. 109, Iss. 4 — February 1958

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