Speaker
Description
Individual (n,γ) rates become important in the weak r-process near Z=26-34 and N=50 during freeze out from a hot process. The (n,γ) rates for a handful of specific isotopes exhibit notable impacts on final r-process abundance patterns in sensitivity studies [1]. One such nucleus with enhanced sensitivity is 80Ge and is in reach for reaction studies at FRIB. The 80Ge(d,pγ) reaction will be measured at FRIB in April 2024 using GODDESS (GRETINA ORRUBA: Dual Detectors for Experimental Structure Studies) [2] and the S800 at ~45 MeV/u. This measurement aims to constrain spectroscopic factors for bound states including low-lying ½+-5/2+ doublet. This will be done in combination with a previous measurement at ~4 MeV/u [3], from which direct neutron capture cross sections will be determined. Additionally, the experiment will inform the compound nucleus (n,γ) cross sections via the Surrogate Reaction Method [4]. Experimental set up and preliminary data from the experiment will be discussed.
This work is supported by the National Science Foundation and U.S. Department of Energy National Nuclear Security Administration and Office of Nuclear Physics.
[1] R. Surman et al. AIP Advances 4, 041008 (2014)
[2] S.D. Pain et al. Physics Procedia 90, 455 (2017)
[3] S. Ahn et al. Phys. Rev. C 100, 04613 (2019)
[4] J.E. Escher et al., Rev. Mod. Phys. 84, 353 (2012)
