The C-13(alpha,n)O-16 reaction is the prevalent neutron source for the main s-process. The direct measurement of this reaction at stellar temperature (kT=8 keV) has so far not been possible due to the very low cross section at the corresponding energy. The extrapolation of the astrophysical S-factor of this reaction into the Gamow window (E-alpha,E-c.m.=140-230 keV) is complicated by the large uncertainties of the low-energy experimental data and the existence of a state of O-17 near the alpha-threshold that can have a large effect on low energy cross section. The aim of this paper is to introduce the new LUNA experimental setup, dedicated to the investigation of C-13(alpha,n)O-16 reaction below E-alpha,E-lab=400 keV.
Introduction of the new LUNA experimental setup for high precision measurement of the 13C(a,n)16O reaction for astrophysical purposes
Ciani, G. F.
;
2017-01-01
Abstract
The C-13(alpha,n)O-16 reaction is the prevalent neutron source for the main s-process. The direct measurement of this reaction at stellar temperature (kT=8 keV) has so far not been possible due to the very low cross section at the corresponding energy. The extrapolation of the astrophysical S-factor of this reaction into the Gamow window (E-alpha,E-c.m.=140-230 keV) is complicated by the large uncertainties of the low-energy experimental data and the existence of a state of O-17 near the alpha-threshold that can have a large effect on low energy cross section. The aim of this paper is to introduce the new LUNA experimental setup, dedicated to the investigation of C-13(alpha,n)O-16 reaction below E-alpha,E-lab=400 keV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
