https://doi.org/10.1140/epja/i2004-10067-y
Levels in 127La fed by the 127Ce beta-decay
1
Japan Atomic Energy Research Institute, 319-1195, Tokai, Japan
2
Department of Nuclear Engineering, Nagoya University, 464-8603, Nagoya, Japan
* e-mail: iimura@popsvr.tokai.jaeri.go.jp
Received:
26
June
2004
Accepted:
13
August
2004
Published online:
8
December
2004
The low-lying levels in 127La have been studied through the β-decay of 127Ce ( T 1/2 = 29s) produced by bombarding a natMo target with a 185-MeV 35Cl beam. Reaction products were on-line mass-separated, and γ-ray singles and γ-γ coincidence measurements were performed. Conversion electrons were also measured and multipolarities of transitions have been derived. The half-life of the 210.9-keV level was determined to be (1.9±0.3)ns by the β-γ delayed coincidence technique. The level scheme obtained has been compared with calculations based on the Nilsson model.
PACS: 23.20.Lv γ transitions and level energies – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2004