Acta Physica Polonica B
Vol. 37, No. 1, January 2006, page 183
Isospin Effects Studied with the CHIMERA Detector at 35 MeV/Nucleon
R. Planeta, F. Amorini, A. Anzalone, L. Auditore, V. Baran, I.
Berceanu, J. Blicharska, J. Brzychczyk, B. Borderie, R. Bougault, M.
Bruno, G. Cardella,
S. Cavallaro, M.B. Chatterjee, A. Chbihi, M. Colonna, M. D'Agostino, E.
DeFilippo, R. Dayras, M. DiToro, J. Frankland, E. Galichet, W.
Gawlikowicz,
E. Geraci, F. Giustolisi, A. Grzeszczuk, P. Guazzoni, D.
Guinet, M. Iacono-Manno, S. Kowalski, E. LaGuidara, G. Lanzano, G.
Lanzalone, J. Lukasik,
C. Maiolino, Z. Majka, N. LeNeindre, N.G.
Nicolis, A. Pagano, M. Papa, M. Petrovici, E. Piasecki, S. Pirrone, G.
Politi, A. Pop, F. Porto, M.F. Rivet,
E. Rosato, F. Rizzo, S. Russo, P. Russotto, M. Sassiv, K. Schmidt, K.
Siwek-Wilczynska, I.
Skwira-Chalot, A. Sochocka, M.L. Sperduto, L. Swiderski,
A. Trifiro, M.
Trimarchi, G. Vannini, G. Verde, M. Vigilante, J.P. Wieleczko, J.
Wilczynski, L. Zetta, W.
Zipper
The yield of light charged particles and intermediate mass
fragments is studied for the neutron-rich, 124Sn+64Ni,
and neutron-poor, 112Sn+58Ni, reactions at 35
MeV/nucleon as a function of the impact parameter. Our main
observations are: (i) The yields of 1H, 3He
and 4He particles in the neutron-poor system are enhanced
with respect to the neutron-rich system and the yield of 3H
is suppressed at all impact parameters, (ii) The ratio of 3H
to 3He yield is three times larger for neutron poor
system, (iii) The N/Z ratio of the emitted intermediate-mass
fragments shows dependence on the isospin of the system, { (iv) The
neutron richness of detected intermediate mass fragments depends
strongly on their rapidity. The gross features of the experimental data
are reproduced by quantum molecular dynamics model calculations.
PACS numbers: 25.70.Mn, 25.70.Pq