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Low–energy photodisintegration of 9Be and α+α+n→9Be +γ reactions at astrophysical conditions |
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| Authors: | VD Efros H Oberhummer A Pushkin IJ Thompson |
| Institution: | (1) Russian Research Centre “Kurchatov Institute”, Kurchatov Square 1, 123182 Moscow, Russia, RU;(2) Institut für Kernphysik, Wiedner Hauptstrasse 8--10, TU Wien, A--1040, Vienna, Austria, AT;(3) Department of Mathematical Physics, Lund Institute of Technology, P.O. Box, 118 S--221 00 Lund, Sweden, SE;(4) Department of Physics, University of Surrey, Guildford GU2 5XH, United Kingdom, GB |
| Abstract: | A semi–microscopic model for the low–energy photodisintegration of the 9Be nucleus is constructed, and the experimental data are analyzed with its help. The older radioactive isotope data are supported by this analysis. The theoretical photodisintegration cross section is derived. The astrophysical rates for the reaction α+α+n→9Be+γ and the reverse photodisintegration of 9Be are calculated. The new reaction rate for α+α+n→9Be+γ is compared with previous estimations. Received: 19 January 1998 |
| Keywords: | PACS:25 20 Dc Photon absorption and scattering – 25 40 Lw Radioactive capture – 97 10 Cv Stellar structure interiors evolution nucleosynthesis ages – 21 60 Gx Cluster models – 21 45 +v Few-body systems |
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