Transverse collective flow and midrapidity emission of isotopically identified light charged particles

Journal Article · Fri Apr 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.044601· OSTI ID:21499580

Kohley, Z; May, L W; Wuenschel, S; Soisson, S N; Stein, B C; Yennello, S J ^[1]; Colonna, M ^[2]; Di Toro, M ^[2]; Zielinska-Pfabe, M ^[3]; Hagel, K; Tripathi, R; Shetty, D V; Galanopoulos, S; Smith, W B ^[4]; Bonasera, A ^[4]; Souliotis, G A ^[4]; Mehlman, M ^[4]

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1. Chemistry Department, Texas A and M University, College Station, Texas 77843 (United States)
2. Laboratori Nazionali del Sud, INFN, I-95123 Catania (Italy)
3. Smith College, Northampton, Massachusetts (United States)
4. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)

The transverse flow and relative midrapidity yield of isotopically identified light charged particles (LCPs) has been examined for the 35 MeV/nucleon {sup 70}Zn+{sup 70}Zn, {sup 64}Zn+{sup 64}Zn, and {sup 64}Ni+{sup 64}Ni systems. A large enhancement of the midrapidity yield of the LCPs was observed relative to the yield near the projectile rapidity. In particular, this enhancement was increased for the more neutron-rich LCPs demonstrating a preference for the production of neutron-rich fragments in the midrapidity region. Additionally, the transverse flow of the LCPs was extracted, which provides insight into the average movement of the particles in the midrapidity region. Isotopic and isobaric effects were observed in the transverse flow of the fragments. In both cases, the transverse flow was shown to decrease with an increasing neutron content in the fragments. A clear inverse relationship between the transverse flow and the relative midrapidity yield is shown. The increased relative midrapidity emission produces a decreased transverse flow. The stochastic mean-field model was used for comparison to the experimental data. The results showed that the model was able to reproduce the general isotopic and isobaric trends for the midrapidity emission and transverse flow. The sensitivity of these observables to the density dependence of the symmetry energy was explored. The results indicate that the transverse flow and midrapidity emission of the LCPs are sensitive to the denisty dependence of the symmetry energy.

• OSTI ID: 21499580
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 83; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
CHARGED PARTICLES
COMPARATIVE EVALUATIONS
ELEMENTARY PARTICLES
EMISSION
ENERGY RANGE
EVALUATION
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MEAN-FIELD THEORY
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NICKEL 64
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
SENSITIVITY
STABLE ISOTOPES
STOCHASTIC PROCESSES
SYMMETRY
ZINC 64
ZINC 70
ZINC ISOTOPES