2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 16, 331-336 (2003)
DOI: 10.1140/epja/i2002-10107-8

Conversion electron measurement in the $\mth{\beta^{-}}$-decay of $\chem{^{151}Pr}$

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 $\beta^{-}$-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 $\gamma$-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.

PACS
21.10.Hw - Spin, parity, and isobaric spin.
23.20.Nx - Internal conversion and extranuclear effects.
27.70.+q - $150 \leq A \leq 189$ .

© Società Italiana di Fisica, Springer-Verlag 2003