Novel technique for constraining r-process (n,$\gamma$) reaction rates

Abstract

A novel technique has been developed, which will open exciting new opportunities for studying the very neutron-rich nuclei involved in the r-process. As a proof-of-principle, the $\gamma$-spectra from the $\beta$-decay of ${}^{76}$Ga have been measured with the SuN detector at the National Superconducting Cyclotron Laboratory. The nuclear level density and $\gamma$-ray strength function are extracted and used as input to Hauser-Feshbach calculations. The present technique is shown to strongly constrain the ${}^{75}$Ge($n,\gamma$)${}^{76}$Ge cross section and reaction rate.

5 pages, 3 figures

References in corpus (8)

• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Analysis of possible systematic errors in the Oslo method
• Impact of a low-energy enhancement in the gamma-ray strength function on the radiative neutron-capture
• Half-lives and branchings for β-delayed neutron emission for neutron-rich Co-Cu isotopes in the r-process
• Nuclear level densities and gamma-ray strength functions in 44,45Sc
• Determining neutron-capture cross sections via the surrogate reaction technique
• Impact of New beta-decay Half-lives on r-process Nucleosynthesis
• Nuclear Level Density and Gamma-Ray Strength Function of 43Sc

Cited by in corpus (9)

• Current Status of r-Process Nucleosynthesis
• Reference Database for Photon Strength Functions
• Novel Techniques for Constraining Neutron-Capture Rates Relevant for r-Process Heavy-Element Nucleosynthesis
• Reverse engineering nuclear properties from rare earth abundances in the $r$ process
• Quasicontinuum $\gamma$-decay of ${}^{91,92}$Zr: benchmarking indirect ($n,\gamma$) cross section measurements for the $s$-process
• Analysis of uncertainties in alpha-particle optical-potential assessment below the Coulomb barrier
• Consistent optical potential for incident and emitted low-energy $\alpha$ particles. II. $\alpha$-emission in fast-neutron induced reactions on Zr isotopes
• Nuclear level densities and gamma-ray strength functions of ${}^{180,181,182}$Ta
• Role of consistent parameter sets in an assessment of the alpha-particle optical potential below the Coulomb barrier