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Relation between the O-16 (alpha,gamma) Ne-20 reaction and its reverse Ne-20 (gamma,alpha) O-16 reaction in stars and in the laboratory

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Mohr, Peter Angulo, C. [UCL] Descouvemont, P. Utsunomiya, H.

(eng) The astrophysical reaction rates of the 16O(a,g)20Ne capture reaction and its inverse 20Ne(g,a)16O photodisintegration reaction are given by the sum of several narrow resonances and a small direct capture contribution at low temperatures. Although the thermal population of low lying excited states in 16O and 20Ne is extremely small, the first excited state in 20Ne plays a non-negligible role for the photodisintegration rate. Consequences for experiments with so-called quasi-thermal photon energy distributions are discussed. Comment: 4 pages, 2 figures, Proceedings Nuclear Physics in Astrophysics-II, Debrecen, Hungary, 2005

Document type Article de périodique (Journal article)
Publication date 2005
Journal information "European Physical Journal A. Hadrons and Nuclei" - Vol. 27, p. 75-78 (2006)
Publisher Springer (Heidelberg)
issn 1434-6001
e-issn 1434-601X
Publication status Publié
Affiliation UCL
Keywords Astrophysics
Links
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  8. Mohr P., Babilon M., Galaviz D., Sonnabend K., Vogt K., Zilges A., Nucleosynthesis by photon-induced reactions, 10.1016/s0375-9474(03)00973-4
  9. Mohr Peter, Photon-induced Reactions in Stars and in the Laboratory: A Critical Comparison, 10.1063/1.1737151
  10. Vogt K., Mohr P., Babilon M., Enders J., Hartmann T., Hutter C., Rauscher T., Volz S., Zilges A., Measurement of the(γ,n)reaction rates of the nuclides190Pt,192Pt,and198Ptin the astrophysicalγprocess, 10.1103/physrevc.63.055802
  11. Vogt K., Mohr P., Babilon M., Bayer W., Galaviz D., Hartmann T., Hutter C., Rauscher T., Sonnabend K., Volz S., Zilges A., Measurement of the (γ, n) cross section of the nucleus 197Au close above the reaction threshold, 10.1016/s0375-9474(02)00922-3
  12. Sonnabend K., Vogt K., Galaviz D., Müller S., Zilges A., Systematic study of(γ,n)reaction rates forZ⩾78isotopes, 10.1103/physrevc.70.035802
Bibliographic reference Mohr, Peter ; Angulo, C. ; Descouvemont, P. ; Utsunomiya, H.. Relation between the O-16 (alpha,gamma) Ne-20 reaction and its reverse Ne-20 (gamma,alpha) O-16 reaction in stars and in the laboratory. In: European Physical Journal A. Hadrons and Nuclei, Vol. 27, p. 75-78 (2006)
Permanent URL http://hdl.handle.net/2078/30996