B(E1) stirengths and isospin symmetry in As-67 and Se-67

Orlandi R., de Angelis G., Della Vedova F., Gadea A., Napoli D. R., Recchia F., ...More

International Conference on Proton Emitting Nuclei and Related Topics, Lisbon, Portugal, 17 - 23 June 2007, vol.961, pp.190-191 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 961
  • City: Lisbon
  • Country: Portugal
  • Page Numbers: pp.190-191
  • Istanbul University Affiliated: No


In a recent experiment at Argonne National Laboratory, new spectroscopic information was obtained for the mirror pair As-67 and Se-67 via the measurement of the lifetime of analogue 9/2(+) excited states. The nuclei of interest were populated via the fusion evaporation reaction of S-32 on Ca-40, and selected by the combination of Gammasphere, Microball and the Neutron Wall arrays. The mirror B(E 1) strengths were measured via the centroid shift method in analogue E I transitions in 67As and 67Se. These findings are significant in determining the extent of conservation of isospin symmetry.