EPJ Web of Conferences (Jan 2019)

Comparative study of four reactions at onset of pre-equilibrium emission

  • Cicerchia Magda,
  • Gramegna Fabiana,
  • Fabris Daniela,
  • Marchi Tommaso,
  • Cinausero Marco,
  • Mantovani Giorgia,
  • Degerlier Meltem,
  • Barlini Sandro,
  • Bini Maurizio,
  • Bruno Mauro,
  • Caciolli Antonio,
  • Camaiani Alberto,
  • Casini Giovanni,
  • Cieplicka-Orynczak Natalia,
  • Collazuol Gianmaria,
  • D’Agostino Michela,
  • Dell’Aquila Daniele,
  • Fornal Bogdan,
  • Frosin Catalin,
  • Gelli Nicla,
  • Gruyer Diego,
  • Kravchuk Vladimir,
  • Leoni Silvia,
  • Lombardo Ivano,
  • Mengoni Daniele,
  • Morelli Luca,
  • Olmi Alessandro,
  • Ottanelli Pietro,
  • Pasquali Gabriele,
  • Piantelli Silvia,
  • Poggi Giacomo,
  • Valdré Simone

DOI
https://doi.org/10.1051/epjconf/201922301010
Journal volume & issue
Vol. 223
p. 01010

Abstract

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The study of the emitted particles, comparing pre-equilibrium and thermal components, is a useful tool to examine the nuclear structure of emitters. Possible clustering effects, which may change the expected decay chain probability, could be highlighted on the competition between different reaction mechanisms. The NUCL-EX collaboration (INFN, Italy) has carried out an extensive research campaign on pre-equilibrium emission of light charged particles from hot nuclei. In this framework, the reactions 16O+30Si, 18O+28Si, 19F+27Al at 7 AMeV and 16O+30Si at 8 AMeV have been carried out using the GARFIELD+RCo array at Legnaro National Laboratories. Some anomalies in the α-particle emission channels have been evidenced in the measurement reported above, showing in an exclusive way the observed effects related to the entrance channels. The experimental results are compared to model prediction, for which the same filtering and complete event selection have been applied.