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SUMMARY:The study of 20Ne(p\,γ)21Na and 21Ne(p\,γ)22Na reactions at LUNA
DTSTART;VALUE=DATE-TIME:20240528T151000Z
DTEND;VALUE=DATE-TIME:20240528T153000Z
DTSTAMP;VALUE=DATE-TIME:20260306T121650Z
UID:indico-contribution-23798@indico.ific.uv.es
DESCRIPTION:Speakers: Sandra Zavatarelli (INFN - Genova)\, Antonio  Caciol
 li  (Universita' di Padova and INFN)\, Francesca Cavanna  (INFN - Sezione 
 di Torino)\, Eliana Masha (Helmholtz-Zentrum Dresden-Rossendorf)\, Ragande
 ep Singh Sidhu (SUPA\, School of Physics and Astronomy\, University of Edi
 nburgh)\nAmong the hydrogen burning processes in stars\, proton reactions 
 with Ne isotopes are very relevant to constrain the production and abundan
 ces of neon and sodium isotopes in massive stars\, novae and supernovae. I
 n particular the 20Ne(p\,γ)21Na reaction is the first and slowest reactio
 n of the NeNa cycle and it controls the speed at which the entire cycle pr
 oceeds: its rate affects the synthesis  of all the elements in the cycle. 
  In the temperature range from 0.1 GK to 1 GK\, it is dominated by the Ep=
  386 keV resonance and by the direct capture component. On the other hand\
 , The 21Ne(p\,γ)22Na reaction has a relevant role in the production of th
 e radioactive isotope 22Na in novae and supernovae. At T~0.1-0.7GK\, the m
 ain contributions to the stellar rate are provided by several resonances (
 Ep=126\, 271\, 272\, 290 and 352 keV). Both reactions have been recently s
 tudied at LUNA (Laboratory for Underground Nuclear Astrophysics) using the
  intense proton beam delivered by the LUNA 400 kV accelerator and a window
 less differential-pumping gas target coupled with two high-purity germaniu
 m detectors. New resonance strengths and branching ratios have been determ
 ined for all the resonances of interest and several new transitions observ
 ed for 22Na excited states. The contribution is aimed to summarize the new
  results and to highlight their impact on Ne-Na cycle.\n\nhttps://indico.i
 fic.uv.es/event/7332/contributions/23798/
LOCATION:ADEIT - Valencia
URL:https://indico.ific.uv.es/event/7332/contributions/23798/
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