γ width of the unbound 5.17 MeV level of 14O and the ``hot'' CNO cycle

Details γ width of the unbound 5.17 MeV level of 14O and the ``hot'' CNO cycle γ width of the unbound 5.17 MeV level of 14O and the ``hot'' CNO cycle

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvc..40.1887f&link_type=abstract

Physical Review C (Nuclear Physics), Volume 40, Issue 5, November 1989, pp.1887-1900

Physics

Nuclear Physics

25

Radiative Capture, Elementary Particle Processes, 6<=A<=19

Scientific paper

We have measured the γ-ray branching ratio Γγ/Γ of the unbound 5.17 MeV first excited state in 14O using the 12C(3He,nγ) reaction at E3He=9.35 MeV. We detected coincidences between n1 neutrons populating the 14O state and 5.17 MeV γ rays from its decay, and obtained Γγ/Γ=(7.2+/-3.5)×10-5. When combined with the known total width Γ=38.1+/-1.8 keV, our branching ratio corresponds to Γγ=2.7+/-1.3 eV. We use this γ-ray width, together with previously measured nonresonant 13C(p,γ1) data, to find the 13N(p,γ) reaction rate at astrophysical energies, thereby determining the stellar environments where hydrogen burning through ``hot'' or β-limited CNO cycle can occur.

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