Excitation energy deposition in central collisions of 40[ital A] MeV [sup 40]Ar with [sup 232]Th

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.R1737· OSTI ID:5121201

Utley, D; Wada, R; Hagel, K; Li, J; Bin, X; Gui, M; Lou, Y; Tezkratt, R; Natowitz, J B; Gonin, M ^[1]

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1. Cyclotron Institute, Texas A M University, College Station, Texas 77843 (United States)

Excitation energy depositions in the reactions of 40[ital A] MeV [sup 40]Ar with [sup 232]Th have been determined from measurements of neutron multiplicities in coincidence with mass identified heavy reaction products. For the most central collisions the derived excitation energies of 880 MeV are 200--300 MeV above previous estimates and in excellent agreement with momentum transfer systematics. Heavy evaporation residues are observed for these collisions indicating apparent dynamic delays in the fission channel of (1--5)[times]10[sup [minus]20] s. While a massive-transfer simulation incorporating preequilibrium emission is in generally good agreement with the experimental results evidence is also found for strongly damped collisions.

• DOE Contract Number: FG05-86ER40256
• OSTI ID: 5121201
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663470 -- Fission-- (1992-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 40 REACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVAPORATION
EXCITATION
FERMIONS
FISSION
HADRONS
HEAVY ION REACTIONS
MOMENTUM TRANSFER
MULTIPLICITY
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PHASE TRANSFORMATIONS
TARGETS
THORIUM 232 TARGET