Transient times of fission in sup 40 Ar+ sup 232 Th peripheral collisions

Journal Article · Mon May 21 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2483· OSTI ID:6804899

Eckert, E; Kuehmichel, A; Pochodzalla, J ^[1]; Hildenbrand, K D; Lynen, U; Mueller, W F.J.; Rabe, H J; Sann, H; Stelzer, H; Trautmann, W; Trockel, R; Wada, R ^[2]; Cerruti, C; Lhenoret, P; Lucas, R; Mazur, C; Ngo, C; Ribrag, M; Tomasi, E ^[3]; Demeyer, A ; Guinet, D ^[4]

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1. Universitaet Frankfurt, D-6000 Frankfurt (Federal Republic of Germany)
2. Gesellschaft Fuer Schwerionenforschung Darmstadt, D-6100 Darmstadt, (Federal Republic of Germany)
3. Centre d'Etudes Nucleaires de Saclay, F-91191 Gif-sur-Yvette, (France)
4. Universite Claude Bernard, F-69622 Villeurbanne, (France)

Peripheral {sup 40}Ar+{sup 232}Th collisions at a bombarding energy {ital E}/{ital A}=30 MeV were studied by measuring coincidences of fission fragments with projectile fragments detected near the grazing angle. It is found that the sequential fission of the highly excited target residue nuclei is severely hindered if their excitation energies, determined from the measured recoil momenta, exceed a value of abour 50--75 MeV. A transient time of fission of the order of 10{sup {minus}20} s is deduced.

• OSTI ID: 6804899
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:21; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

652020* -- Nuclear Properties & Reactions
A=220 & above
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ARGON 40 REACTIONS
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
ENERGY DEPENDENCE
ENERGY RANGE
FISSION
GEV RANGE
GEV RANGE 01-10
HEAVY ION REACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
PARTICLE PROPERTIES
PROBABILITY
SPIN
STATISTICAL MODELS
TARGETS
THORIUM 232 TARGET
TIME MEASUREMENT