Anomalous Peaklike Structure in the Fission Fragment Anisotropiesat Sub-barrier Energies in {sup 11}B, {sup 12}C, {sup 16}O, {sup 19}F+{sup 232}Th Reactions

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.5027· OSTI ID:404074

Majumdar, N; Bhattacharya, P ^[1]; Biswas, D C; Choudhury, R K; Nadkarni, D M; Saxena, A ^[2]

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1. Saha Institute of Nuclear Physics, 1/AF, Bidhannagar Calcutta 700 064 (India)
2. Bhabha Atomic Research Centre, Bombay 400 085 (India)

Fission fragment angular distributions have been measured for fission following full momentum transfer in {sup 11}B, {sup 12}C, {sup 16}O, and {sup 19}F+{sup 232}Th systems from above barrier to below sub-barrier energies. The fragment anisotropies are found to exhibit an anomalous peaklike structure below the fusion barrier in all the systems. This structure has a universal behavior independent of the entrance channel mass asymmetry. With some refinement in the quasifission hypothesis it is possible to explain qualitatively the experimental results reasonably well. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 404074
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
ANISOTROPY
ASYMMETRY
BORON 11 REACTIONS
CARBON 12 REACTIONS
CARBON 12 TARGET
FISSION FRAGMENTS
FLUORINE 19 REACTIONS
FRAGMENTATION
MASS
MOMENTUM TRANSFER
OXYGEN 16 REACTIONS
THORIUM 232 TARGET