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SUMMARY:PISTA\, a new detection system for transfer-induced fission studie
 s in inverse kinematics at VAMOS
DTSTART:20260710T090000Z
DTEND:20260710T110000Z
DTSTAMP:20260627T200100Z
UID:indico-event-39806@indico.in2p3.fr
DESCRIPTION:Speakers: Lucas Bégué-Guillou (LP2iB)\n\nMore than 80 years 
 after its discovery\, a complete description of the fissionprocess remains
  a challenge. It is a many-body dynamic problem involving bothmicroscopic 
 and macroscopic aspects of nuclear matter. New experimental data onexotic 
 fissioning systems that cannot be probed using direct neutron induced fiss
 ion areneeded to further understand the fission process. Moreover\, techno
 logicalbreakthroughs such as the development of Gen-IV reactors and variou
 s fundamentalaspirations bring motivation for the scientific community to 
 have a betterunderstanding of this mechanism.At GANIL\, fission studies us
 ing the VAMOS++ large acceptance spectrometercombined with 238U beams at e
 nergies around the Coulomb barrier allow to populateexotic fissioning syst
 ems. Also\, fission induced by transfer or fusion reaction in inversekinem
 atics allows obtaining isotopic identification (in mass and charge) of fis
 sionfragments. Furthermore\, the detection and identification of the targe
 t-like residueprovide the characterization of the fissioning systems in te
 rms of mass\, atomic numberand excitation energy. Such a combination has b
 een shown to be a powerful tool toextract post-evaporation isotopic yields
  and neutron content (N/Z) that hold thesignature of the shell effects at 
 play in the process [1] as well as fission barrier [2].Recently\, an upgra
 de of the target-like residue detection systems has beeninitiated. For thi
 s\, the new PISTA (Particle Identification Silicon Telescope Array)detecto
 r has been developed. PISTA is an array of eight trapezoidal silicon teles
 copedetectors assembled as in a corolla. Each telescope is composed of two
  single sidedsilicon detectors\, 100 μm and 1000 μm thick\, placed 10 cm
  from the target. The arraycovers angles between 30° and 60°. Target-lik
 e nuclei are identified using (ΔE\, E)technique up to Oxygen isotopes\, r
 esulting in the characterisation of the fissioningsystem. The high angular
  granularity of the detector allows the reconstruction of thereaction kine
 matics\, thus allowing the reconstruction of the Excitation energy of thef
 issioning system using two-body kinematics. Thanks to this detection syste
 m coupledto VAMOS++\, isotopic fission yields with high statistics per ene
 rgy bin of about 1 MeV inexcitation energy from 6 up to 20 MeV is expected
 .In this presentation\, the results of the first experiment using PISTA wi
 ll bediscussed. This experiment used a 238U beam at 6 A MeV impinging on a
  100 μg/cm2thick 12C target. The characteristics and the performances of 
 the PISTA detectionsystem will be presented.\n[1] D. Ramos et al. Phys. Re
 v. C 101\, 034609 (2020)[2] C. Rodríguez-Tajes et al. Phys. Rev. C 89\, 0
 24614 (2014)[3] Rejmund\, M.\, et al. NIM Section A 646 (2011): 184-191\n\
 nhttps://indico.in2p3.fr/event/39806/
URL:https://indico.in2p3.fr/event/39806/
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