Development of a Monte Carlo code for the data analysis of the 18F(p,α) 15O reaction at astrophysical energies

A. Caruso, S. Cherubini, C. Spitaleri, V. Crucillà, M. Gulino, M. La Cognata, L. Lamia, G. Rapisarda, S. Romano, Ml Sergi, S. Kubono, H. Yamaguchi, S. Hayakawa, Y. Wakabayashi, N. Iwasa, S. Kato, T. Komatsubara, T. Teranishi, A. Coc, F. HammacheN. De Séréville

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Novae are astrophysical events (violent explosion) occurring in close binary systems consisting of a white dwarf and a main-sequence star or a star in a more advanced stage of evolution. They are called "narrow systems" because the two components interact with each other: there is a process of mass exchange with resulting in the transfer of matter from the companion star to the white dwarf, leading to the formation of this last of the so-called accretion disk, rich mainly of hydrogen. Over time, more and more material accumulates until the pressure and the temperature reached are sufficient to trigger nuclear fusion reactions, rapidly converting a large part of the hydrogen into heavier elements. The products of "hot hydrogen burning" are then placed in the interstellar medium as a result of violent explosions. Studies on the element abundances observed in these events can provide important information about the stages of evolution stellar. During the outbursts of novae some radioactive isotopes are synthesized: in particular, the decay of short-lived nuclei such as 13N and 18F with subsequent emission of gamma radiation energy below 511 keV. The gamma rays from products electron-positron annihilation of positrons emitted in the decay of 18F are the most abundant and the first observable as soon as the atmosphere of the nova starts to become transparent to gamma radiation. Hence the importance of the study of nuclear reactions that lead both to the formation and to the destruction of 18F. Among these, the 18F(p,α)15O reaction is one of the main channels of destruction. This reaction was then studied at energies of astrophysical interest. The experiment done at Riken, Japan, has as its objective the study of the 18F(p,α)15O reaction, using a beam of 18F produced at CRIB, to derive important information about the phenomenon of novae. In this paper we present the experimental technique and the Monte Carlo code developed to be used in the data analysis process.

Original languageEnglish
Title of host publicationExotic Nuclei and Nuclear/Particle Astrophysics (V). From Nuclei to Stars - Carpathian Summer School of Physics 2014, CSSP 2014
EditorsDaniela Chesneanu, Livius Trache, Calin Alexandru Ur
PublisherAmerican Institute of Physics Inc.
Number of pages5
ISBN (Electronic)9780735412842
Publication statusPublished - 2015
EventCarpathian Summer School of Physics 2014: Exotic Nuclei and Nuclear/Particle Astrophysics (V). From Nuclei to Stars, CSSP 2014 - Sinaia, Romania
Duration: 2014 Jul 132014 Jul 26

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceCarpathian Summer School of Physics 2014: Exotic Nuclei and Nuclear/Particle Astrophysics (V). From Nuclei to Stars, CSSP 2014


  • Novae
  • Nuclear Reactions
  • Nucleosynthesis

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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