Direct measurement of the 15N(p,gamma)16O total cross section at novae energies

Details Direct measurement of the 15N(p,gamma)16O total cross section at novae energies Direct measurement of the 15N(p,gamma)16O total cross section at novae energies

2009-02-04

arxiv.org/abs/0902.0783v1

J.Phys.G36:045202,2009

Physics

Nuclear Physics

Nuclear Experiment

LUNA collaboration; accepted by J. Phys. G

Scientific paper

10.1088/0954-3899/36/4/045202

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.

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