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Title: {alpha}-decay spectroscopy of the new isotope {sup 192}At

Abstract

Decay properties of the new neutron-deficient nuclide {sup 192}At have been studied in the complete fusion reaction {sup 144}Sm({sup 51}V,3n){sup 192}At at the velocity filter SHIP. Two isomeric states with half-lives of 88(6) ms and 11.5(6) ms, respectively, and with complex {alpha}-decay schemes were identified in {sup 192}At. The decay pattern of one of the isomers suggests that it is based on the oblate-deformed {pi}2f{sub 7/2}x{nu}1i{sub 13/2} configuration, which confirms the expected onset of deformation in the At isotopes by approaching the neutron midshell at N=104.

Authors:
 [1]; ; ;  [2]; ;  [3];  [4];  [5]; ; ; ; ; ; ;  [3];  [3];  [4]; ; ;  [6] more »;  [3];  [7];  [8] « less
  1. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)
  2. Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, SK-84248 (Slovakia)
  3. Gesellschaft fuer Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt (Germany)
  4. (Germany)
  5. IPN Orsay, F-91406 Orsay Cedex (France)
  6. Instituut voor Kern- en Stralingsfysica, University of Leuven, B-3001 Leuven (Belgium)
  7. (Japan)
  8. Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE (United Kingdom) (and others)
Publication Date:
OSTI Identifier:
20771268
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.73.024317; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; ALPHA SPECTROSCOPY; ASTATINE ISOTOPES; HALF-LIFE; ISOMERIC NUCLEI; NEUTRON-DEFICIENT ISOTOPES; NEUTRONS; NUCLEAR DEFORMATION; SAMARIUM 144 TARGET; VANADIUM 51 REACTIONS

Citation Formats

Andreyev, A.N., Antalic, S., Streicher, B., Saro, S., Ackermann, D., Muenzenberg, G., Institut fuer Physik, Johannes Gutenberg-University, D-55099 Mainz, Franchoo, S., Hessberger, F.P., Kojouharov, I., Kindler, B., Kuusiniemi, P., Lommel, B., Mann, R., Sulignano, B., Hofmann, S., Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M., Lesher, S.R., Duppen, P. van, Nishio, K., Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, and Page, R.D. {alpha}-decay spectroscopy of the new isotope {sup 192}At. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.024317.
Andreyev, A.N., Antalic, S., Streicher, B., Saro, S., Ackermann, D., Muenzenberg, G., Institut fuer Physik, Johannes Gutenberg-University, D-55099 Mainz, Franchoo, S., Hessberger, F.P., Kojouharov, I., Kindler, B., Kuusiniemi, P., Lommel, B., Mann, R., Sulignano, B., Hofmann, S., Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M., Lesher, S.R., Duppen, P. van, Nishio, K., Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, & Page, R.D. {alpha}-decay spectroscopy of the new isotope {sup 192}At. United States. doi:10.1103/PhysRevC.73.024317.
Andreyev, A.N., Antalic, S., Streicher, B., Saro, S., Ackermann, D., Muenzenberg, G., Institut fuer Physik, Johannes Gutenberg-University, D-55099 Mainz, Franchoo, S., Hessberger, F.P., Kojouharov, I., Kindler, B., Kuusiniemi, P., Lommel, B., Mann, R., Sulignano, B., Hofmann, S., Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt, Huyse, M., Lesher, S.R., Duppen, P. van, Nishio, K., Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, and Page, R.D. Wed . "{alpha}-decay spectroscopy of the new isotope {sup 192}At". United States. doi:10.1103/PhysRevC.73.024317.
@article{osti_20771268,
title = {{alpha}-decay spectroscopy of the new isotope {sup 192}At},
author = {Andreyev, A.N. and Antalic, S. and Streicher, B. and Saro, S. and Ackermann, D. and Muenzenberg, G. and Institut fuer Physik, Johannes Gutenberg-University, D-55099 Mainz and Franchoo, S. and Hessberger, F.P. and Kojouharov, I. and Kindler, B. and Kuusiniemi, P. and Lommel, B. and Mann, R. and Sulignano, B. and Hofmann, S. and Physikalisches Institut, J.W. Goethe-Universitaet, D-60054 Frankfurt and Huyse, M. and Lesher, S.R. and Duppen, P. van and Nishio, K. and Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 and Page, R.D.},
abstractNote = {Decay properties of the new neutron-deficient nuclide {sup 192}At have been studied in the complete fusion reaction {sup 144}Sm({sup 51}V,3n){sup 192}At at the velocity filter SHIP. Two isomeric states with half-lives of 88(6) ms and 11.5(6) ms, respectively, and with complex {alpha}-decay schemes were identified in {sup 192}At. The decay pattern of one of the isomers suggests that it is based on the oblate-deformed {pi}2f{sub 7/2}x{nu}1i{sub 13/2} configuration, which confirms the expected onset of deformation in the At isotopes by approaching the neutron midshell at N=104.},
doi = {10.1103/PhysRevC.73.024317},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}
  • Measurements are reported of the B/sub 210/ alpha-decay branching ratio ((1.32 plus or minus 0.10) x 10/sup -6/) and the Pb/sup 210/ alpha branching ratio and energy ((1.7 plus or minus 0.3) x 10/sup -8/ and 3.72 plus or minus 0.02 Mev). The beta energy and half life of Hg/sup 206/ are determined; the Hg/ sup 206/ can be produced either by alpha decay of Pb/sup 210/ or by the reaction Pb/sup 208/(p 3p)Hg/sup 206/. (T.F.R.)
  • Alpha decays of {sup 237}Cm and {sup 238}Cm have been studied using a gas-jet coupled on-line isotope separator. The new isotope {sup 237}Cm has been identified through the detection of 6656{+-}10 keV {alpha} particles. The {alpha} energy of {sup 238}Cm has been revised more precisely than the previous one. The {alpha} transition to the first excited 2{sup +} state in {sup 234}Pu has also been observed. It was found that the 2{sup +} energy in {sup 234}Pu is much higher than those in heavier Pu isotopes.
  • The new neutron deficient isotope {sup 209}Th has been produced in the reaction of {sup 32}S on {sup 182}W at beam energy of 171 MeV. Evaporation residues were separated in flight from beam by a JAERI recoil mass separator, and implanted in a position sensitive strip detector. The genetic correlation of {alpha}-decay events, their energies and half-lives has been used to identify isotopes. An {alpha}-decay energy and a half-life of {sup 209}Th have been determined to be 8.080(50) MeV and 3.8{sub {minus}1.5}{sup +6.9} ms, respectively. {copyright} {ital 1996 The American Physical Society.}