Neutron to proton ratios of quasiprojectile and midrapidity emission in the {sup 58}Ni+{sup 58}Ni reaction at 52 MeV/nucleon

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.014610· OSTI ID:20695892

Theriault, D; Vallee, A; Gingras, L; Larochelle, Y; Roy, R; April, A; Beaulieu, L; Grenier, F; Lemieux, F; Moisan, J; St-Pierre, C; Turbide, S ^[1]; Samri, M ^[2]; Borderie, B; Rivet, M F ^[3]; Bougault, R; Colin, J; Cussol, D; Durand, D; Lecolley, J F ^[4]

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1. Laboratoire de Physique Nucleaire, Departement de Physique, Universite Laval, Quebec, G1K 7P4 (Canada)
2. Laboratoire de Physique Nucleaire et Applications, Universite Ibn Tofail, Kenitra (Morocco)
3. Institut de Physique Nucleaire, IN2P3-CNRS, F-91406 Orsay Cedex (France)
4. LPC, IN2P3-CNRS, ISMRA and Universite, F-14050 Caen Cedex (France); and others

By combining data from a charged particle {sup 58}Ni+{sup 58}Ni experiment at 52 MeV/nucleon with an {sup 36}Ar+{sup 58}Ni experiment at 50 MeV/nucleon for which free neutrons have been detected, an increase in the neutron to proton ratio of the whole nuclear material at midrapidity has been experimentally observed in the reaction {sup 58}Ni+{sup 58}Ni at 52 MeV/nucleon. The neutron-to-proton ratio of the quasi-projectile emission is analyzed for the same reactions and is seen to decrease below the ratio of the initial system. Those observations suggest that an asymmetric exchange of neutrons and protons between the quasiprojectile and the midrapidity region exists.

• OSTI ID: 20695892
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 71; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36 REACTIONS
ASYMMETRY
CHARGED PARTICLES
EMISSION
MEV RANGE
NEUTRONS
NICKEL 58 REACTIONS
NICKEL 58 TARGET
PROTONS