First Measurement of the ${}^{96}$Ru(p,$\gamma$)${}^{97}$Rh Cross Section for the p-Process with a Storage Ring

Abstract

This work presents a direct measurement of the ${}^{96}$Ru($p,\gamma$)${}^{97}$Rh cross section via a novel technique using a storage ring, which opens opportunities for reaction measurements on unstable nuclei. A proof-of-principle experiment was performed at the storage ring ESR at GSI in Darmstadt, where circulating ${}^{96}$Ru ions interacted repeatedly with a hydrogen target. The ${}^{96}$Ru($p,\gamma$)${}^{97}$Rh cross section between 9 and 11 MeV has been determined using two independent normalization methods. As key ingredients in Hauser-Feshbach calculations, the $\gamma$-ray strength function as well as the level density model can be pinned down with the measured ($p,\gamma$) cross section. Furthermore, the proton optical potential can be optimized after the uncertainties from the $\gamma$-ray strength function and the level density have been removed. As a result, a constrained ${}^{96}$Ru($p,\gamma$)${}^{97}$Rh reaction rate over a wide temperature range is recommended for $p$-process network calculations.

arXiv comment10 pages, 7 figs, Accepted for publication at PRC

References in corpus (10)

• Astrophysical Reaction Rates From Statistical Model Calculations
• Neutrino-induced nucleosynthesis of A>64 nuclei: The nu p-process
• Nuclear Level Density and the Determination of Thermonuclear Rates for Astrophysics
• Microscopic HFB+QRPA predictions of dipole strength for astrophysics applications
• Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data
• Coulomb suppression of the stellar enhancement factor
• 70Ge(p,gamma)71As and 76Ge(p,n)76As cross sections for the astrophysical p process: sensitivity of the optical proton potential at low energies
• Investigation of the reaction 74Ge(p,gamma)75As using the in-beam method to improve reaction network predictions for p nuclei
• Cross sections for proton-induced reactions on Pd isotopes at energies relevant for the gamma process
• Nuclear Astrophysics in Storage Rings

Cited by in corpus (21)

• The production of proton-rich isotopes beyond iron: The $\gamma$ process in stars
• Nuclear Physics of the Outer Layers of Accreting Neutron Stars
• Heavy-Ion Storage Rings and Their Use in Precision Experiments with Highly Charged Ions
• Novel Techniques for Constraining Neutron-Capture Rates Relevant for r-Process Heavy-Element Nucleosynthesis
• Approaching the Gamow window with stored ions: Direct measurement of ${}^{124}$Xe(p,$\gamma$) in the ESR storage ring
• Storage ring mass spectrometry for nuclear structure and astrophysics research
• Expanding Nuclear Physics Horizons with the Gamma Factory
• A spallation-based neutron target for direct studies of neutron-induced reactions in inverse kinematics
• The Status and Future of Direct Nuclear Reaction Measurements for Stellar Burning
• Measurement of ${}^{58}$Ni($p$, $p$)${}^{58}$Ni elastic scattering at low momentum transfer by using the HIRFL-CSR heavy-ion storage ring
• Measurements of ${}^{160}$Dy($p,\gamma$) at energies relevant for astrophysical $\gamma$ process
• Exploratory investigation of the HIPPO gas-jet target fluid dynamic properties
• Radiative electron capture as a tunable source of highly linearly polarized x-rays
• Determination of $\alpha$-optical potential for reactions with p-nuclei from the study of ($\alpha$,n) reactions in the astrophysically relevant energy region
• First Proton-Induced Cross Sections on a Stored Rare Ion Beam: Measurement of 118Te(p,γ) for Explosive Nucleosynthesis
• Storage, Accumulation and Deceleration of Secondary Beams for Nuclear Astrophysics
• Determination of luminosity for in-ring reactions: A new approach for the low-energy domain
• Constraining the Synthesis of the Lightest p Nucleus 74Se
• Employing $p{+}^{58}$Ni elastic scattering for determination of $K$-shell ionization cross section of ${}^{58}$Ni${}^{19+}$ in collisions with hydrogen gas target at 95 MeV/u
• Neutron-induced reactions in nuclear astrophysics
• Photo-nuclear reaction rates of ${}^{157,159}$Ho and ${}^{163,165}$Tm and their impact in the $\gamma$--process