New Isotope of Silicon: 6.3-sec Si33

D. R. Goosman and D. E. Alburger
Phys. Rev. C 5, 1252 – Published 1 April 1972
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Abstract

Si33 has been produced via the O18+O18Si33+2p+n reaction using 23-40-MeV O18 ions. Identification is made from the observed γ rays of 1431.3 ± 0.5, 1847.69 ± 0.25, and 2538 ± 2 keV which agree with the first three excited states of P33. By means of the reaction P31(t,p)P33, γ rays from the first two excited states of P33 have been measured as 1431.4 ± 0.3 and 1847.60 ± 0.15 keV. The three Si33 γ rays decay together and a value of T12=6.3±0.3 sec is obtained from the 1848-keV line. Relative γ intensities correspond to Si33 β branches to the 1431-, 1848-, and 2539-keV states of P33 in the ratios 0.06 ± 0.06: 1: 0.10 ± 0.02. No information was obtained on a possible Si33 ground-state β branch. The results are consistent with the expected mass and spin-parity (Jπ=32+) of the Si33 ground state.

  • Received 3 December 1971

DOI:https://doi.org/10.1103/PhysRevC.5.1252

©1972 American Physical Society

Authors & Affiliations

D. R. Goosman and D. E. Alburger

  • Brookhaven National Laboratory, Upton, New York 11973

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Issue

Vol. 5, Iss. 4 — April 1972

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