Short note
New excitation scheme of 139Cs
A. Nowak1 - W. Urban1 - W. Kurcewicz1 - T. Rzaca-Urban1 - H. Mach2 - B. Fogelberg2 - J.L. Durell3 - M.J. Leddy3 - M.A. Jones3 - W.R. Phillips3 - A.G. Smith3 - B.J. Varley3 - M. Bentaleb4 - E. Lubkiewicz4 - N. Schulz4 - I. Ahmad5 - L.R. Morss5
1 Institue of Experimental Physics, Warsaw University, ul.Hoza 69, PL-00-681
Warszawa, Poland
2 Department of Neutron Research, Uppsala University, S-61182 Nyköping, Sweden
3 Schuster Laboratory, Department of Physics and Astronomy, University of Manchester,
Manchester M13 9PL, UK
4 Centre de Recherches Nucléaires, IN2P3-CNRS/Université Louis Pasteur, F-67037 Strasbourg,
France
5 Argonne National Laboratory, Argonne, IL 60439, USA
Received: 9 July 1999 Communicated by B. Povh
Abstract
Excited levels in 139Cs, populated in spontaneous fission of
248Cm, have been studied by means of prompt gamma spectroscopy,
using the EUROGAMM 2 array. New level scheme of 139Cs, different
from the one proposed recently, has been established.
To confirm the new scheme, additional study of 139Cs has been
performed, where 
-rays following 
-decay of 139Xe
to 139Cs have been measured at the mass separator OSIRIS.
PACS
23.20.Lv Gamma transitions and level energies -
21.60.Cs Shell model -
25.85.Ca Spontaneous fission -
27.60.+j 
Copyright Springer-Verlag
