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

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024605· OSTI ID:21386610

Wilczynski, J; Swiderski, L ^[1]; Skwira-Chalot, I; Siwek-Wilczynska, K ^[2]; Pagano, A; Cardella, G; De Filippo, E; Guidara, E La; Papa, M; Pirrone, S ^[3]; Amorini, F; Anzalone, A; Cavallaro, S; Colonna, M; Toro, M Di; Maiolino, C; Porto, F; Rizzo, F; Russotto, P ^[4]; Auditore, L ^[5]

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1. Andrzej Soltan Institute for Nuclear Studies, Swierk/Warsaw (Poland)
2. Institute of Experimental Physics, University of Warsaw, Warsaw (Poland)
3. INFN, Sezione di Catania, Catania (Italy)
4. INFN, Laboratori Nazionali del Sud, Catania (Italy)
5. INFN, Gruppo Collegato di Messina and Dipartimento di Fisica, Universita di Messina, Messina (Italy)

Collisions of a very heavy nonfusing nuclear system {sup 197}Au+{sup 197}Au were studied at an energy of 15 MeV/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.

• OSTI ID: 21386610
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024605; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ATOM-ATOM COLLISIONS
COLLISIONS
COMPARATIVE EVALUATIONS
DEEP INELASTIC SCATTERING
GOLD 197
MEV RANGE 10-100
NUCLEAR FRAGMENTS
NUCLEONS
ATOM COLLISIONS
BARYONS
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FERMIONS
GOLD ISOTOPES
HADRONS
HEAVY NUCLEI
INELASTIC SCATTERING
INTERACTIONS
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MEV RANGE
NUCLEI
ODD-EVEN NUCLEI
PARTICLE INTERACTIONS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES