BETA-DELAYED PROTON EMISSION: A NEW SERIES OF PRECURSORS AND THE MEASUREMENT OF 10** minus **1**6 s NUCLEAR LIFETIMES. Academic Article uri icon

abstract

  • The study of beta-delayed proton emission yields information both on the beta-decay of the precursor nucleus and on the properties of excited states in the emitter. Among light elements, where a few strong transitions usually dominate, the series of even-Z, T//z equals minus 3/2 nuclei provided an early insight into T equals 3/2 analogue states and the superallowed transitions that populate them. Results have been obtained on a new series of even-Z precursors with T//z equals plus 1/2. Like all known heavy precursors, the nuclei so far identified - **6**5Ge, **6**9Se, **7**3Kr, **7**7Sr, **8**1Zr and provisionally **8**5Mo - exhibit broad proton continua. However, the availability of such a series of nuclei makes it possible to extract a systematic picture of the beta-decay strength function as well as level densities, widths and decay energies from the observed spectra. By the addition of a new experimental technique, it has also been possible to determine the absolute values of the widths through direct measurement of the average lifetime of states populated in the emitter.

published proceedings

  • Atomic Energy of Canada Limited, AECL (Report)

author list (cited authors)

  • Hardy, J. C., MacDonald, J. A., Schmeing, H., Faestermann, T., Andrews, H. R., Geiger, J. S., Graham, R. L., & Jackson, K. P.

complete list of authors

  • Hardy, JC||MacDonald, JA||Schmeing, H||Faestermann, T||Andrews, HR||Geiger, JS||Graham, RL||Jackson, KP

publication date

  • August 1976