DOI: 10.1140/epja/i2002-10107-8
Conversion electron measurement in the
-decay
of
Y. Kojima1, M. Shibata2, A. Taniguchi3, T. Hanafusa1, E. Yoshida1, K. Shizuma1, Y. Kawase3 and S. Yamada3
1 Quantum Energy Applications, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
2 Facility for Nuclear Materials, Nagoya University, Nagoya 464-8603, Japan
3 Research Reactor Institute, Kyoto University, Kumatori 590-0494, Japan
ykojima@hiroshima-u.ac.jp
(Received: 28 June 2002 / Revised version: 21 October 2002 / Published online: 25 February 2003)
Abstract
The
-decay of
151Pr produced by the thermal neutron-induced
fission of
235U has been studied using an on-line isotope separator.
From an internal-conversion electron measurement with a Si(Li) detector,
K-conversion coefficients were obtained for 20
-transitions.
Spins and parities of 6 excited levels in
151Nd were newly determined
from the deduced multipolarities: even parities for the 543 and 627 keV levels,
odd parities for 250 and 599 keV, (3/2, 5/2)
+ for 685 keV,
and (1/2, 3/2)
+ for 880 keV.
The level structure was compared with the rotation-vibration coupling
Nilsson model.
21.10.Hw - Spin, parity, and isobaric spin.
23.20.Nx - Internal conversion and extranuclear effects.
27.70.+q -

© Società Italiana di Fisica, Springer-Verlag 2003