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.

Measurement of the Mg-25(alpha,n)Si-28 reaction cross section at LNL / R. Depalo, A. Caciolli, T. Marchi, S. Appannababu, N. Blasi, C. Broggini, F. Camera, M. Cinausero, G. Collanzuol, D. Fabris, F. Gramegna, V.L. Kravchuk, M. Leone, A. Lombardi, P. Mastinu, R. Menegazzo, G. Montagnoli, G. Prete, V. Rigato, C. Rossi Alvarez, O. Wieland - In: INPC 2013 – International Nuclear Physics Conference / [a cura di] S. Lunardi. - [s.l] : EDP SCIENCES, 2014. - ISBN 978-2-7598-1176-2. - pp. 1-4 (( convegno International Nuclear Physics Conference, INPC 2013 tenutosi a Firenze nel 2013 [10.1051/epjconf/20146607002].

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

R. Depalo;F. Camera;
2014

Abstract

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.
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/931215
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