Abstract
Recent experimental characterization of the subshell closure at in the Ca, Ti, and Cr isotones has stimulated shell-model calculations that indicated the possibility that the isotones of these same elements could exhibit characteristics of a shell closure, namely, a high energy for the first excited level. To that end, we have studied the decay of produced in fragmentation reactions and identified new rays in the daughter isotone . The first level is found at an energy of 1127 keV, well below the expected position that would indicate the presence of an shell closure in .
- Received 9 September 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.072502
©2004 American Physical Society