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Title: Alpha-particle and proton probes of nuclear shapes in the rare earth and mass 80 regions

Abstract

Low emission barriers and large subbarrier anisotropies in the alpha-particle decay with respect to the spin direction, of Sn and rare earth compound nuclei, are examined in the light of recent calculations incorporating deformation. To explore the possibility of a correlation between the proton emission barriers and nuclear deformation, we studied proton spectra from the {sup 52}Cr({sup 34}S,2p2n){sup 82}Sr reaction. The proton spectra were observed with the Dwarf-Ball 4{pi} CsI(Tl) array, in coincidence with 18 Compton suppressed Ge detectors operated in conjunction with the Spin Spectrometer, a 4{pi} NaI(Tl) array. We found significant changes and shifts in the proton energy spectra as we selected gating transitions from bands of different moments of inertia or transitions from states of different spin in the same band. Substantial differences were also seen as a function of the {gamma}-ray multiplicity. These results are discussed in terms of statistical model calculations incorporating deformation and structure effects of the emitting system. 20 refs., 9 figs.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1];  [2];  [3]
  1. (Washington Univ., St. Louis, MO (USA)
  2. (USA)
  3. (USA))
Publication Date:
Research Org.:
Washington Univ., St. Louis, MO (USA)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
5708431
Report Number(s):
CONF-890686-2
ON: DE90000725; TRN: 89-024598
DOE Contract Number:
FG02-88ER40406
Resource Type:
Conference
Resource Relation:
Conference: International conference on new aspects of nuclear spectroscopy, Crete (Greece), 26-30 Jun 1989
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHROMIUM 52 TARGET; SULFUR 34 REACTIONS; RARE EARTH ISOTOPES; ALPHA DECAY; ANGULAR CORRELATION; COMPOUND NUCLEI; COMPUTERIZED SIMULATION; DEFORMED NUCLEI; GE SEMICONDUCTOR DETECTORS; NUCLEAR STRUCTURE; PROTON PROBES; PROTON SPECTRA; CHARGED-PARTICLE REACTIONS; CORRELATIONS; DECAY; HEAVY ION REACTIONS; ISOTOPES; MEASURING INSTRUMENTS; NUCLEAR DECAY; NUCLEAR REACTIONS; NUCLEI; PROBES; RADIATION DETECTORS; SEMICONDUCTOR DETECTORS; SIMULATION; SPECTRA; TARGETS; 653001* - Nuclear Theory- Nuclear Structure, Moments, Spin, & Models; 653003 - Nuclear Theory- Nuclear Reactions & Scattering

Citation Formats

Sarantites, D.G., Nicolis, N.G., Abenante, V., Majka, Z., Semkow, T.M., Baktash, C., Beene, J.R., Garcia-Bermudez, G., Halbert, M.L., Hensley, D.C., Johnson, N.R., Lee, I.Y., McGowan, F.K., Riley, M.A., Virtanen, A., Griffin, H.C., Oak Ridge National Lab., TN, and Michigan Univ., Ann Arbor, MI. Alpha-particle and proton probes of nuclear shapes in the rare earth and mass 80 regions. United States: N. p., 1989. Web.
Sarantites, D.G., Nicolis, N.G., Abenante, V., Majka, Z., Semkow, T.M., Baktash, C., Beene, J.R., Garcia-Bermudez, G., Halbert, M.L., Hensley, D.C., Johnson, N.R., Lee, I.Y., McGowan, F.K., Riley, M.A., Virtanen, A., Griffin, H.C., Oak Ridge National Lab., TN, & Michigan Univ., Ann Arbor, MI. Alpha-particle and proton probes of nuclear shapes in the rare earth and mass 80 regions. United States.
Sarantites, D.G., Nicolis, N.G., Abenante, V., Majka, Z., Semkow, T.M., Baktash, C., Beene, J.R., Garcia-Bermudez, G., Halbert, M.L., Hensley, D.C., Johnson, N.R., Lee, I.Y., McGowan, F.K., Riley, M.A., Virtanen, A., Griffin, H.C., Oak Ridge National Lab., TN, and Michigan Univ., Ann Arbor, MI. Sun . "Alpha-particle and proton probes of nuclear shapes in the rare earth and mass 80 regions". United States. doi:. https://www.osti.gov/servlets/purl/5708431.
@article{osti_5708431,
title = {Alpha-particle and proton probes of nuclear shapes in the rare earth and mass 80 regions},
author = {Sarantites, D.G. and Nicolis, N.G. and Abenante, V. and Majka, Z. and Semkow, T.M. and Baktash, C. and Beene, J.R. and Garcia-Bermudez, G. and Halbert, M.L. and Hensley, D.C. and Johnson, N.R. and Lee, I.Y. and McGowan, F.K. and Riley, M.A. and Virtanen, A. and Griffin, H.C. and Oak Ridge National Lab., TN and Michigan Univ., Ann Arbor, MI},
abstractNote = {Low emission barriers and large subbarrier anisotropies in the alpha-particle decay with respect to the spin direction, of Sn and rare earth compound nuclei, are examined in the light of recent calculations incorporating deformation. To explore the possibility of a correlation between the proton emission barriers and nuclear deformation, we studied proton spectra from the {sup 52}Cr({sup 34}S,2p2n){sup 82}Sr reaction. The proton spectra were observed with the Dwarf-Ball 4{pi} CsI(Tl) array, in coincidence with 18 Compton suppressed Ge detectors operated in conjunction with the Spin Spectrometer, a 4{pi} NaI(Tl) array. We found significant changes and shifts in the proton energy spectra as we selected gating transitions from bands of different moments of inertia or transitions from states of different spin in the same band. Substantial differences were also seen as a function of the {gamma}-ray multiplicity. These results are discussed in terms of statistical model calculations incorporating deformation and structure effects of the emitting system. 20 refs., 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}

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