Phys.Rev. C 102, 044616 (2020)

Y.Nagai, M.Kinoshita, M.Igashira, Y.Nobuhara, H.Makii, K.Mishima, T.Shima, A.Mengoni

Nonresonant p-wave direct capture and interference effect observed in the ¹⁶O (n, γ) ¹⁷O reaction

NUCLEAR REACTIONS ¹⁶O(n, γ)¹⁷O, E=157, 349, 398, 427, 468, 498, 556 keV pulsed quasimonoenergetic neutron beam from the Pelletron accelerator of the Tokyo Institute of Technology; measured prompt discrete Eγ, Iγ and TOF spectra using anti-Compton NaI(Tl) spectrometer, neutron energy spectra using ⁶Li glass scintillator with TOF method; deduced n-capture partial σ(E) to the g.s. and the first excited state in ¹⁷O and total σ(E), astrophysical reaction rates for temperature of 0.001 to 3 GK, Maxwellian-averaged capture cross section (MACS) for thermal energies between kT=5 and 100 keV. Comparison of measured σ(E) with theoretical calculations using direct radiative capture (DRC) process coupled to a single-level Breit-Wigner (SLBW) resonance model.

doi: 10.1103/PhysRevC.102.044616