19 F (d , p) 20 F measurements using the Super-Enge Split-Pole Spectrograph with implications to Type-I X-ray bursts
Abstract
Accreting neutron binary systems generate frequent x-ray bursts upon breaking out from the hot Carbon-Nitrogen-Oxygen (CNO) cycle to the rapid proton-capture process (rp) by the 15 O(α , γ) 19 Ne(p , γ) 20 Na reaction chain. Previous studies investigated the 19 Ne(p , γ) 20 Na reaction rate by using the 19 Ne(d , n) 20 Na mirror reaction, relying on experimental data from the isospin-mirror reaction 19 F(d , p) 20 F and shell model calculations to determine which states will populate with significant cross sections. We investigate the 19 F(d , p) 20 F reaction as an indirect study of the 19 Ne(d , n) 20 Na to obtain reliable data and lessen existing uncertainty of the thermal reaction rate. The experiment was performed using the Super-Enge Split-Pole Spectrograph at FSU's John D. Fox Accelerator Laboratory to measure high-resolution spectra of high-lying states in 20 F . Absolute cross sections and spectroscopic factors are determined for proton resonances in 20 F at 0.66, 2.04, 2.19, 2.97, 3.49, and 3.53 MeV energies which contribute to the level structure of 20 F .
This work was partially supported by the NSF under Grant No. Phy-1712953, 1429019, 1713816 and by FSU.- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DNP.HA005C