Direct measurement of the 15N(p,gamma)16O total cross section at novae energies
/ Authors
D. Bemmerer, A. Caciolli, A. Caciolli, R. Bonetti, C. Broggini, F. Confortola, P. Corvisiero, H. Costantini, Z. Elekes, A. Formicola
and 15 more authors
Z. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, Gy. Gyürky, M. Junker, B. Limata, M. Marta, R. Menegazzo, P. Prati, V. Roca, C. Rolfs, C. Alvarez, E. Somorjai, O. Straniero
/ Abstract
The 15N(p,gamma)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,gamma)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 two lower than previously believed.
Journal: arXiv: Nuclear Experiment