Observation of fast collinear partitioning of the 197Au + 197Au system into three and four fragments of comparable size

Wilczynski, J.; Skwira Chalot, I.; Siwek Wilczynska, K.; Pagano, A.; Amorini, F.; Anzalone, A.; Auditore, Lucrezia; Baran, V.; Brzychczyk, J.; Cardella, G.; Cavallaro, S.; Chatterjee, M. B.; Colonna, M.; De Filippo, E.; Di Toro, M.; Gawlikowicz, W.; Geraci, E.; Grzeszczuk, A.; Guazzoni, P.; Kowalski, S.; La Guidara, E.; Lanzalone, G.; Lukasik, J.; Maiolino, C.; Majka, Z.; Nicolis, N. G.; Papa, M.; Piasecki, E.; Pirrone, S.; Planeta, R.; Politi, G.; Porto, F.; Rizzo, F.; Russotto, P.; Schmidt, K.; Sochocka, A.; Swiderski, L.; Trifiro', Antonio; Trimarchi, Marina; Wieleczko, J. P.; Zetta, L.; Zipper, W.

doi:10.1103/PhysRevC.81.024605

Collisions of a very heavy nonfusing nuclear system 197Au + 197Au were studied at an energy of 15MeV/ nucleon. An interesting process of violent reseparation of this heavy system into three or four fragments of comparable size was observed. In the case of ternary partitioning, either the projectile-like fragment (PLF) or target-like fragment (TLF) breaks up almost collinearly with the PLF-TLF separation axis. In the case of quaternary reactions, both PLF and TLF were observed breaking up along this direction. By comparison with a dynamical model of deep inelastic collisions it was concluded that the ternary and quaternary reactions occur in semiperipheral collisions, in a range of angular momenta corresponding to about 0.5–0.7 of the maximum L value for grazing collisions. The time elapsing from the scission of the binary PLF + TLF system to the secondary scission of PLF or TLF was estimated to be of about 70–80 fm/c for the ternary reactions and 80–100 fm/c for the quaternary reactions.

Titolo:	Observation of fast collinear partitioning of the 197Au + 197Au system into three and four fragments of comparable size
Autori:	J. Wilczynski I. Skwira Chalot K. Siwek Wilczynska A. Pagano F. Amorini A. Anzalone AUDITORE, Lucrezia V. Baran J. Brzychczyk G. Cardella S. Cavallaro M. B. Chatterjee M. Colonna E. De Filippo M. Di Toro W. Gawlikowicz E. Geraci A. Grzeszczuk P. Guazzoni S. Kowalski E. La Guidara G. Lanzalone J. Lukasik C. Maiolino Z. Majka N. G. Nicolis M. Papa E. Piasecki S. Pirrone R. Planeta G. Politi F. Porto F. Rizzo P. Russotto K. Schmidt A. Sochocka L. Swiderski TRIFIRO', Antonio TRIMARCHI, Marina J. P. Wieleczko L. Zetta W. Zipper mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2010
Rivista:	PHYSICAL REVIEW. C, NUCLEAR PHYSICS
Abstract:	Collisions of a very heavy nonfusing nuclear system 197Au + 197Au were studied at an energy of 15MeV/ nucleon. An interesting process of violent reseparation of this heavy system into three or four fragments of comparable size was observed. In the case of ternary partitioning, either the projectile-like fragment (PLF) or target-like fragment (TLF) breaks up almost collinearly with the PLF-TLF separation axis. In the case of quaternary reactions, both PLF and TLF were observed breaking up along this direction. By comparison with a dynamical model of deep inelastic collisions it was concluded that the ternary and quaternary reactions occur in semiperipheral collisions, in a range of angular momenta corresponding to about 0.5–0.7 of the maximum L value for grazing collisions. The time elapsing from the scission of the binary PLF + TLF system to the secondary scission of PLF or TLF was estimated to be of about 70–80 fm/c for the ternary reactions and 80–100 fm/c for the quaternary reactions.
Handle:	http://hdl.handle.net/11570/1902868
Appare nelle tipologie:	14.a.1 Articolo su rivista

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