Acta Physica Polonica B
Vol. 37, No. 1, January 2006, page 199
Isoscaling in Neck Fragmentation
E. De Filippo, 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, R. Dayras, M. Di Toro, J. Frankland, E. Galichet, W. Gawlikowicz, E. Geraci, F. Giustolisi, A. Grzeszczuk, P. Guazzoni, D. Guinet, M. Iacono-Manno, S. Kowalski, E. La Guidara, G. Lanzalone, G. Lanzano, C. Maiolino, Z. Majka, N. Le Neindre, A. Pagano, M. Papa, M. Petrovici, E. Piasecki, S. Pirrone, R. Planeta, G. Politi, A. Pop, F. Porto, M.F. Rivet, E. Rosato, F. Rizzo, S. Russo, P. Russotto, M. Sassi, K. Schmidt, K. Siwek-Wilczynska, I. Skwira, M.L. Sperduto, A. Sochocka, L. Swiderski, A. Trifiro, M. Trimarchi, G. Vannini, G. Verde, M. Vigilante, J.P. Wieleczko, J. Wilczynski, L. Zetta, W. Zipper
Production of intermediate mass fragments (IMF) has been studied
in semi-peripheral 124Sn (35 A MeV) + 64Ni and 112Sn
(35 A MeV) + 58Ni reactions. Our recently proposed new
method of an analysis of the neck-like fragmentation processes that
provides information on the IMFs time sequence and time scale is
reviewed. Isotopic analysis of so characterized IMFs gives evidence for
neutron enrichment of mid-velocity fragments. A clear isoscaling
behavior is found despite the short emission time scale. Evolution of
the isoscaling parameters from semi-peripheral to central collisions is
discussed.
PACS numbers: 25.70.Mn, 25.70.Pq