The fusion-fission process in the reaction {sup 34}S+{sup 186}W near the interaction barrier

Journal Article · Tue Feb 24 00:00:00 EST 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4909598· OSTI ID:22390994

Harca, I. M. ^[1]; Dmitriev, S.; Itkis, J.; Kozulin, E. M.; Knyazheva, G.; Loktev, T.; Novikov, K. ^[2]; Azaiez, F.; Gottardo, A.; Matea, I.; Verney, D. ^[3]; Chubarian, G. ^[4]; Hanappe, F. ^[5]; Piot, J.; Schmitt, C. ^[6]; Trzaska, W. H. ^[7]; Vardaci, E. ^[8]

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1. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, (FLNR JINR) Dubna, Russia and Faculty of Physics, University of Bucharest - P.O. Box MG 11, RO 77125, Bucharest-Magurele (Romania)
2. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, (FLNR JINR) Dubna (Russian Federation)
3. IPN, CNRS/IN2P3, Univ. Paris-Sud, 91405 Orsay (France)
4. Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366 (United States)
5. Universite Libre de Bruxelles (ULB), Bruxelles (Belgium)
6. GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France)
7. Accelerator Laboratory of University of Jyväskylä (JYFL), Jyväskylä (Finland)
8. Dipartamento di Scienze Fisiche and INFN (INFN-Na), Napoli (Italy)

The reaction {sup 34}S+{sup 186}W at E{sub lab}=160 MeV was investigated with the aim of diving into the features of the fusion-fission process. Gamma rays in coincidence with binary reaction fragments were measured using the high efficiency gamma-ray spectrometer ORGAM at the TANDEM Accelerator facility of I.P.N., Orsay, and the time-of-flight spectrometer for fission fragments (FF) registration CORSET of the Flerov Laboratory of Nuclear Reactions (FLNR), Dubna. The coupling of the ORGAM and CORSET setups offers the unique opportunity of extracting details for characterizing the fusion-fission process and gives information regarding production of neutron-rich heavy nuclei. The FF–γ coincidence method is of better use then the γ – γ coincidence method when dealing with low statistic measurements and also offers the opportunity to precisely correct the Dopler shift for in-flight emitted gamma rays. Evidence of symmetric and asymmetric fission modes were observed in the mass and TKE distributions, occurring due to shell effects in the fragments. Coincident measurements allow for discrimination between the gamma rays by accepting a specific range within the mass distribution of the reaction products. Details regarding the experimental setup, methods of processing the acquisitioned data and preliminary results are presented.

• OSTI ID: 22390994
• Journal Information: AIP Conference Proceedings, Vol. 1645, Issue 1; Conference: Carpathian Summer School of Physics 2014, Sinaia (Romania), 13-26 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COINCIDENCE METHODS
COUPLING
DATA ACQUISITION
FISSION
FISSION FRAGMENTS
GAMMA RADIATION
GAMMA SPECTROMETERS
MASS DISTRIBUTION
MEV RANGE
NEUTRONS
SULFUR 34 REACTIONS
TANDEM ELECTROSTATIC ACCELERATORS
TIME-OF-FLIGHT SPECTROMETERS
TUNGSTEN 186 TARGET