EPJ

2021 Impact factor 3.131
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 4, 9-10

Short note

A new high-spin isomer in 145Sm

K. Jessen1 - W. Andrejtscheff1,3 - M. Bergström2 - P. von Brentano1 - A. Dewald1 - B. Herskind2 - H. Meise1 - C. Schumacher1 - G. Sletten2 - O. Stuch1 - D. Weißhaar1 - I. Wiedenhöver1 - J. Wrzesinski2

1 Institut für Kernphysik, Universtät zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany, e-mail: ian@ikp.Uni-Koeln.DE
2 Niels Bohr Institute, University of Copenhagen, DK-4000 Roskilde, Denmark
3 Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria

Received: 23 October 1998 Communicated by B. Povh

Abstract
A new high-spin isomer in 145Sm was observed by in-beam $\gamma$-ray spectroscopy with the reaction 122Sn(27Al,3np) at 127 MeV performed at the NORDBALL multi-detector array in Roskilde. The excitation energy of the isomer was determined to be $E_{\mbox{\scriptsize x}} = 11147~\mbox{keV}$, and using the generalized centroid-shift method its half-life was found to be $T_{1/2} = (7.4 \pm 1.0)$ ns.

PACS
21.10.Tg Lifetimes - 25.70.Gh Compound nucleus - 27.60.+j $90 \le A \le 149$

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