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SUMMARY:Asymmetric fission in heavy ion collisions
DTSTART;VALUE=DATE-TIME:20261029T135000Z
DTEND;VALUE=DATE-TIME:20261029T140500Z
DTSTAMP;VALUE=DATE-TIME:20261104T222847Z
UID:indico-contribution-6303@cern.ch
DESCRIPTION:Speakers: Anna Kulikovskaya (NRC Kurchatov Institute)\nMomentu
 m distributions of light fragments produced in asymmetric fission  in heav
 y ion collisions provide information on reaction dynamics and breakup mech
 anisms of spectator systems. At small emission angles relative to the beam
  direction and with high momentum resolution\, energy spectra of light fra
 gments exhibit a double-humped structure contrary to the Gaussian profile 
 expected in usually accepted statistical approach. This effect has been se
 en in two experiments only [1\,2]. This report presents results on the fra
 gmentation of iron nuclei into light fragments at the energy of 230 MeV/nu
 cleon measured in the FRAGM experiment at the TWAC heavy ion accelerator c
 omplex [1\,3]. It is shown that the measured momentum spectra exhibit this
  effect and it is most pronounced for protons and tends to diminish for he
 avier fragments. Furthermore\, it is demonstrated that the observation of 
 this effect in both mentioned above experiments can be explained within th
 e framework of certain nucleus-nucleus interaction models which take into 
 account the Coulomb interaction.\n\n[1] B. M. Abramov et al.\, EPJ Web Con
 f. 204\,  03008  (2019) 03008.\n[2] P. Napolitani et al.\, Phys. Rev. C 70
 \, 054607 (2004).\n[3] A. A. Kulikovskaya and M. A. Martemianov\, Phys.Par
 t.Nucl. 56\, 1077 (2025).\n\nhttps://indico.particle.mephi.ru/event/626/co
 ntributions/6303/
LOCATION: Conference Hall 4
URL:https://indico.particle.mephi.ru/event/626/contributions/6303/
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