The 15N(p,γ )16O reaction controls the passage of nucleosynthetic material from the first to the second carbon-nitrogen-oxygen (CNO) cycle. A direct measurement of the total 15N(p,γ )16O cross section at energies corresponding to hydrogen burning in novae is presented here. Data have been taken at 90–230 keV center-of-mass energy using a windowless gas target filled with nitrogen of natural isotopic composition and a bismuth germanate summing detector. The cross section is found to be a factor 2 lower than previously believed.
Direct measurement of the 15N(p,γ)16O total cross section at novae energies / D. Bemmerer, A. Caciolli, R. Bonetti, C. Broggini, F. Confortola, P. Corvisiero, H. Costantini, Z. Elekes, A. Formicola, Z. Fulop, G. Gervino, A. Guglielmetti, C. Gustavino, G. Gyurky, M. Junker, B. Limata, M. Marta, R. Menegazzo, P. Prati, V. Roca, C. Rolfs, C. Rossi Alvarez, E. Somorjai, O. Straniero. - In: JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS. - ISSN 0954-3899. - 36:4(2009), pp. 045202.045202.1-045202.045202.10. [10.1088/0954-3899/36/4/045202]
Direct measurement of the 15N(p,γ)16O total cross section at novae energies
R. Bonetti;A. Guglielmetti;
2009
Abstract
The 15N(p,γ )16O reaction controls the passage of nucleosynthetic material from the first to the second carbon-nitrogen-oxygen (CNO) cycle. A direct measurement of the total 15N(p,γ )16O cross section at energies corresponding to hydrogen burning in novae is presented here. Data have been taken at 90–230 keV center-of-mass energy using a windowless gas target filled with nitrogen of natural isotopic composition and a bismuth germanate summing detector. The cross section is found to be a factor 2 lower than previously believed.
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