Internal excitation of intermediate mass fragments from collisions of {sup 36}Ar+Ag nuclei at 35 MeV/nucleon

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.219· OSTI ID:69524

Deak, F; Horvath, A; Kiss, A ^[1]; Seres, Z ^[2]; Galonsky, A; Gelbke, C K; Hama, H; Heilbronn, L; Krofcheck, D; Lynch, W G; Sackett, D W; Schelin, H R; Tsang, M B ^[3]; Kasagi, J ^[4]; Murakami, T ^[5]

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1. Department of Atomic Physics, Eoetvoes Lorand University, H-1088 Puskin u. 5-7, Budapest (Hungary)
2. KFKI Research Institute for Particle and Nuclear Physics, H-1525 Budapest 114 (Hungary)
3. National Superconducting Cyclotron Laboratory and Department of Physics Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
4. Laboratory of Nuclear Science, Tohoku University, Mikamine 1-2-1, Taihaku, Sendai 982 (Japan)
5. Department of Physics, Kyoto University, Kyoto 606-01 (Japan)

Population rates for neutron-unbound states compared to bound states were determined for intermediate mass fragments from {sup 36}Ar+Ag collisions at 35 MeV/nucleon. The population ratios were measured as a function of fragment kinetic energy at angles of 15{degree}, 30{degree}, 45{degree}, and 60{degree}, especially for {sup 12}B fragments but also for {sup 7}Li, {sup 8}Li, {sup 11}Be, and {sup 13}C fragments. The results show no major dependence on either the kinetic energy or the emission angle of the fragments. There are signs of a moderate contribution to the dominating statistical decay from nonequilibrium quasi-elastic decay at the smaller angles. The population ratios for the different fragments are consistent with emission from a source of a single temperature which emits complex nuclei at freeze-out. Comparison of the present results with those from a similar experiment, but with {sup 14}N projectiles at 35 MeV/nucleon, shows that the population ratios for strongly damped processes are the same for both {sup 14}N and {sup 36}Ar projectiles on Ag.

• Sponsoring Organization: USDOE
• OSTI ID: 69524
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON 36 REACTIONS
BERYLLIUM 11
BORON 12
BOUND STATE
CARBON 13
EXCITATION
GEV RANGE 01-10
KINETIC ENERGY
LITHIUM 7
LITHIUM 8
NEUTRONS
NUCLEAR FRAGMENTS
SILVER 108 TARGET