Short note
Possible evidence for the entrance channel effect
in reactions leading to 
W*
M. Kmiecik1 - A. Maj1,2 - B. Herskind2 - A. Bracco3 - R.A. Bark2 - M. Bergström2 - F. Camera3 - G. Hagemann2 - N. Hashimoto2 - A. Holm2 - S. Leoni3 - T. Saitoh2 - T.S. Tveter4
1 The Henryk Niewodniczanski Institute of Nuclear Physics,
PL-31-342 Kraków, Poland
2 The Niels Bohr Institute, DK-2100 Copenhagen, Denmark
3 Universitá di Milano, Dipartimento di Fisica and INFN sez. Milano, I-20133
Milano, Italy
4 University of Oslo, N-0316 Oslo, Norway
Received: 30 October 1997
Abstract
The decay of 170W* formed in
reactions with two different projectile - target combinations was studied.
The observed differences in the average number of emitted neutrons suggest
an entrance channel effect at the highest excitation energy and angular
momentum. It may be explained by different excitation
energies of the equilibrated system, resulting from the emission of
pre-equilibrium 
-particles during a longer fusion time, in the more
symmetric reaction.
PACS
25.70.-z Low and intermediate energy heavy-ion physics -
25.70.Gh Compound nucleus
Copyright Springer-Verlag
