Fusionlike processes in the sup 14 N+ sup 232 Th reaction at 30 MeV/nucleon

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.991· OSTI ID:7252514

Leegte, H K.W.; Boonstra, A L; Hinnefeld, J D; Koldenhof, E E; Siemssen, R H; Siwek-Wilczynska, K; Sosin, Z; Wilczynski, J; Wilschut, H W ^[1]

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1. Kernfysisch Versneller Instituut, NL-9747 AA Groningen (Netherlands)

Fusionlike processes were studied in the {sup 14}N+{sup 232}Th reaction at 30 MeV per nucleon. Partition of the fusionlike cross section was determined by detecting nonequilibrium charged particles with an array of phoswich detectors (plastic wall) in coincidence with fission fragments for which the folding angle and thus the momentum transfer was measured. By measuring both single and multiple hits in the plastic wall and by correcting for its incomplete angular coverage a very extensive database of the fusionlike channels was obtained. The results were compared with model predictions comprising the BUU, Fermi jetting, the Boltzmann master equation model, and the nucleon-exchange transport model. It was found that these models which globally describe the dependence of the inclusive momentum transfer in fusionlike reactions cannot account for the associated particle production, in particular if the nucleons bound in the observed complex particles ({ital d},{ital t},{alpha}) are included in the comparison. Calculations of the energy spectra of the complex particles with the coalescence formalism indicate that a large fraction of the observed complex particles in the fusionlike reactions cannot be accounted for by pre-equilibrium emission from the fused composite system. They most probably originate from massive-transfer-type reactions that contribute to the beam-velocity component in the energy spectra.

• OSTI ID: 7252514
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ENERGY RANGE
EXPERIMENTAL DATA
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
INFORMATION
MEV RANGE
MEV RANGE 100-1000
NITROGEN 14 REACTIONS
NUCLEAR REACTIONS
NUMERICAL DATA
TARGETS
THORIUM 232 TARGET