EPJ Web of Conferences (Mar 2014)

Measurement of the 25Mg(α,n)28Si reaction cross section at LNL

  • Depalo R.,
  • Caciolli A.,
  • Marchi T.,
  • Appannababu S.,
  • Blasi N.,
  • Broggini C.,
  • Camera F.,
  • Cinausero M.,
  • Collanzuol G.,
  • Fabris D.,
  • Gramegna F.,
  • Kravchuk V. L.,
  • Leone M.,
  • Lombardi A.,
  • Mastinu P.,
  • Menegazzo R.,
  • Montagnoli G.,
  • Prete G.,
  • Rigato V.,
  • Rossi Alvarez C.,
  • Wieland O.

DOI
https://doi.org/10.1051/epjconf/20146607002
Journal volume & issue
Vol. 66
p. 07002

Abstract

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The detection of the 1809 keV emission line associated with the decay of 26Al in the interstellar medium provides a direct evidence of recent nucleosynthesis events in our galaxy. 26Al is thought to be mainly produced in massive stars, but in order to have a quantita- tive understanding of the 26Al distribution, the cross section of all the nuclear reactions involved in its production should be accurately known. A recent sensitivity study demonstrated that the 25Mg(α,n)28Si is the reaction with the strongest impact on the synthesis of 26Al during explosive Neon and Carbon burning [4]. In order to improve the experimental knowledge of the 25Mg(α,n)28Si cross section, a new direct measurement has been performed at Legnaro National Laboratories. The experimental setup, the data analysis and preliminary results are discussed.