Isoscaling of fragments with Z=1-17 from reconstructed quasiprojectiles
- Chemistry Department, Texas A and M University, College Station, Texas 77843 (United States)
- Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
- Department of Physics, State University of New York at Oswego, New York 13126 (United States)
In heavy-ion collisions, isoscaling provides a method for studying the evolution of nuclear symmetry energy as a function of excitation energy. One challenge in using isoscaling is to accurately determine the neutron-to-proton ratio (N/Z) of the fragmenting source. Isoscaling results are presented for the reactions of {sup 86,78}Kr+{sup 64,58}Ni at 35 MeV/nucleon taken on the NIMROD-ISiS array at Texas A and M University. The N/Z of the source was calculated from the isotopically identified fragments and experimentally measured neutrons emitted from reconstructed quasiprojectiles. These data exhibit isoscaling for elements with Z=1-17 over a broad range of isotopes. The isoscaling parameter {alpha} is shown to increase with increasing difference in the neutron composition ({delta}) of the compared sources. For a selected {delta}, the ratio {alpha}/{delta} is also shown to decrease with increasing excitation energy. This may reflect a corresponding decrease in the nuclear symmetry energy.
- OSTI ID:
- 21289895
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevC.79.061602; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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