Experiments Concerning the Low-Energy States of the O19 Nucleus

W. Zimmermann, Jr.
Phys. Rev. 114, 837 – Published 1 May 1959
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Abstract

Angular distributions have been measured for three groups of protons from the O18(d, p)O19 reaction, those leaving O19 in its states at 0, 0.096, and 1.47 Mev. Deuteron energies of 1.74 and 2.50 Mev in the laboratory system were used. The distributions of protons leaving O19 in its ground state and in its 1.47-Mev state are characteristic of stripping and indicate the formation of the ground state by an l=2 neutron and of the 1.47-Mev state by an l=0 neutron. However, the distribution of protons leaving O19 in its 0.096-Mev state does not lend itself to a stripping interpretation.

It has been found that the γ decay of the 1.47-Mev state of O19, following the formation of this state in the O18(d, p)O19 reaction, proceeds mostly to the 0.096-Mev state. The mean life of the 0.096-Mev state has been measured by observing the decay in flight of recoiling excited O19 nuclei and is found to be 1.75(1±0.16)×109 second. These observations restrict the likely assignments of spin and parity for the 0.096-Mev state to 32± or 52+.

  • Received 1 December 1958

DOI:https://doi.org/10.1103/PhysRev.114.837

©1959 American Physical Society

Authors & Affiliations

W. Zimmermann, Jr.

  • Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California

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Issue

Vol. 114, Iss. 3 — May 1959

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