Pre-scission sup 1 H and sup 4 He emissions in sup 16 O+ sup 197 Au reaction

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

OSTI ID:6226943

Ikezoe, H; Shikazono, N; Nagame, Y; Sugiyama, Y; Tomita, Y; Ideno, K; Iwamoto, A ^[1]; Ohtsuki, T ^[2]

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1. Department of Physics, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken (Japan)
2. Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Setagaya-ku, Tokyo 156 (Japan)

Pre-scission {sup 1}H and {sup 4}He in {sup 16}O+{sup 197}Au reactions are measured in coincidence with fission fragments in the compound nucleus excitation energy of 48 to 99 MeV. Observed coincident energy spectra of {sup 1}H and {sup 4}He are shifted towards lower energies compared to statistical model calculations. The data are analyzed in terms of the spin-dependent level density and emission barriers for the charged particles. The analysis shows that the effect of the spin-dependent level density on the energy spectrum is small and the effective emission barriers for particle emissions are reduced by 1.0{plus minus}0.4 MeV for {sup 1}H and 1.8{plus minus}0.4 MeV for {sup 4}He relative to the corresponding fusion barriers calculated by using optical potentials.

• OSTI ID: 6226943
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FISSION FRAGMENTS
GOLD 197 TARGET
HADRONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEONS
OXYGEN 16 REACTIONS
PROTONS
STATISTICAL MODELS
TARGETS