The Ne-22(alpha, gamma)Mg-26 reaction competes with the Ne-22(alpha, n)Mg-25 reaction which is the main source of neutrons for the s-process in low-mass Asymptotic Giant Branch (AGB) and massive stars. The Ne-22(alpha, gamma)Mg-26 reaction rate is affected by a high uncertainty mainly due to the poorly constrained 395 keV resonance which has been studied only indirectly leading to a wide range of possible values for its resonance strength (10(-14) - 10(-9) eV). The present study represents the direct measurement of the 395 keV resonance of the Ne-22(alpha, gamma)Mg-26 reaction at LUNA (Laboratory for Underground Nuclear Astrophysics), located at Gran Sasso National Laboratory. Here, the experimental campaigns, setup and some very preliminary results are presented.

Study of the Ne-22(alpha, gamma)Mg-26 reaction at LUNA / E. Masha. - In: EPJ WEB OF CONFERENCES. - ISSN 2100-014X. - 227:(2020), pp. 02004.1-02004.4. ((Intervento presentato al 10. convegno European Summer School on Experimental Nuclear Astrophysics tenutosi a Catania nel 2019 [10.1051/epjconf/202022702004].

Study of the Ne-22(alpha, gamma)Mg-26 reaction at LUNA

E. Masha
Primo
2020

Abstract

The Ne-22(alpha, gamma)Mg-26 reaction competes with the Ne-22(alpha, n)Mg-25 reaction which is the main source of neutrons for the s-process in low-mass Asymptotic Giant Branch (AGB) and massive stars. The Ne-22(alpha, gamma)Mg-26 reaction rate is affected by a high uncertainty mainly due to the poorly constrained 395 keV resonance which has been studied only indirectly leading to a wide range of possible values for its resonance strength (10(-14) - 10(-9) eV). The present study represents the direct measurement of the 395 keV resonance of the Ne-22(alpha, gamma)Mg-26 reaction at LUNA (Laboratory for Underground Nuclear Astrophysics), located at Gran Sasso National Laboratory. Here, the experimental campaigns, setup and some very preliminary results are presented.
Settore FIS/04 - Fisica Nucleare e Subnucleare
Settore FIS/05 - Astronomia e Astrofisica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/861786
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