α-decay spectroscopy of the new isotope At192

A. N. Andreyev, S. Antalic, D. Ackermann, S. Franchoo, F. P. Heßberger, S. Hofmann, M. Huyse, I. Kojouharov, B. Kindler, P. Kuusiniemi, S. R. Lesher, B. Lommel, R. Mann, G. Münzenberg, K. Nishio, R. D. Page, J. J. Ressler, B. Streicher, S. Saro, B. Sulignano, P. Van Duppen, and D. R. Wiseman
Phys. Rev. C 73, 024317 – Published 28 February 2006

Abstract

Decay properties of the new neutron-deficient nuclide At192 have been studied in the complete fusion reaction Sm144(V51,3n)At192 at the velocity filter SHIP. Two isomeric states with half-lives of 88(6) ms and 11.5(6) ms, respectively, and with complex α-decay schemes were identified in At192. The decay pattern of one of the isomers suggests that it is based on the oblate-deformed π2f7/2ν1i13/2 configuration, which confirms the expected onset of deformation in the At isotopes by approaching the neutron midshell at N=104.

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  • Received 25 October 2005

DOI:https://doi.org/10.1103/PhysRevC.73.024317

©2006 American Physical Society

Authors & Affiliations

A. N. Andreyev1, S. Antalic2, D. Ackermann3,8, S. Franchoo4, F. P. Heßberger3, S. Hofmann3,9, M. Huyse5, I. Kojouharov3, B. Kindler3, P. Kuusiniemi3, S. R. Lesher5, B. Lommel3, R. Mann3, G. Münzenberg3,8, K. Nishio3,10, R. D. Page6, J. J. Ressler7, B. Streicher2, S. Saro2, B. Sulignano3, P. Van Duppen5, and D. R. Wiseman6

  • 1TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada, V6T 2A3
  • 2Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, SK-84248, Slovakia
  • 3Gesellschaft für Schwerionenforschung, Planckstraße 1, D-64291 Darmstadt, Germany
  • 4IPN Orsay, F-91406 Orsay Cedex France
  • 5Instituut voor Kern- en Stralingsfysica, University of Leuven, B-3001 Leuven, Belgium
  • 6Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
  • 7Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A-1S6
  • 8Institut für Physik, Johannes Gutenberg-University, D-55099 Mainz, Germany
  • 9Physikalisches Institut, J.W. Goethe-Universität, D-60054 Frankfurt, Germany
  • 10Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

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Issue

Vol. 73, Iss. 2 — February 2006

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