Neutron-to-proton ratios of quasiprojectile and midrapidity emission in the {sup 64}Zn + {sup 64}Zn reaction at 45 MeV/nucleon

Journal Article · Wed Nov 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.051602· OSTI ID:20864012

Theriault, D; Gauthier, J; Grenier, F; Moisan, F; St-Pierre, C; Roy, R ^[1]; Davin, B; Hudan, S; Paduszynski, T; Souza, R T. de ^[2]; Bell, E; Garey, J; Iglio, J; Keksis, A L; Parketon, S; Richers, C; Shetty, D V; Soisson, S N; Souliotis, G A; Stein, B C ^[3]

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1. Laboratoire de Physique Nucleaire, Departement de Physique, Universite Laval, Quebec, Quebec G1K 7P4 (Canada)
2. Department of Chemistry and Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405 (United States)
3. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)

Simultaneous measurement of both neutrons and charged particles emitted in the reaction {sup 64}Zn + {sup 64}Zn at 45 MeV/nucleon allows comparison of the neutron to proton ratio at midrapidity with that at projectile rapidity. The evolution of N/Z in both rapidity regimes with increasing centrality is examined. For the completely reconstructed midrapidity material one finds that the neutron to proton ratio is above that of the overall {sup 64}Zn + {sup 64}Zn system. In contrast, the reconstructed ratio for the quasiprojectile is below that of the overall system. This difference provides the most complete evidence to date of neutron enrichment of midrapidity nuclear matter at the expense of the quasiprojectile.

• OSTI ID: 20864012
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
MEV RANGE
NEUTRONS
NUCLEAR MATTER
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PROTONS
ZINC 64
ZINC 64 REACTIONS
ZINC 64 TARGET