Photoneutron reaction cross section measurements on 94Mo and 90Zr relevant to the p-process nucleosynthesis

Abstract

The photodisintegration cross sections for the 94Mo(γ,n) and 90Zr(γ,n) reactions have been experimentally investigated with quasi-monochromatic photon beams at the High Intensity γ-ray Source (HIγS) facility of the Triangle Universities Nuclear Laboratory (TUNL). The energy dependence of the photoneutron reaction cross sections was measured with high precision from the respective neutron emission thresholds up to 13.5 MeV. These measurements contribute to a broader investigation of nuclear reactions relevant to the understanding of the p-process nucleosynthesis. The results are compared with the predictions of Hauser-Feshbach statistical model calculations using two different models for the dipole γ-ray strength function. The resulting 94Mo(γ,n) and 90Zr(γ,n) photoneutron stellar reaction rates as a function of temperature in the typical range of interest for the p-process nucleosynthesis show how sensitive the photoneutron stellar reaction rate can be to the experimental data in the vicinity of the neutron threshold.

References in corpus (16)

• Astrophysical Reaction Rates From Statistical Model Calculations
• Neutrino-induced nucleosynthesis of A>64 nuclei: The nu p-process
• Large-scale QRPA calculation of E1-strength and its impact on the neutron capture cross section
• Type Ia Supernovae as Sites of p-process: Two-Dimensional Models Coupled to Nucleosynthesis
• Role of deformation on giant resonances within the QRPA approach and the Gogny force
• Radiative strength functions in 93-98Mo
• Pygmy dipole strength in 90Zr
• Large-scale deformed quasiparticle random-phase approximation calculations of the $\gamma$-ray strength function using the Gogny force
• Verification of detailed balance for $\gamma$ absorption and emission in Dy isotopes
• Cross-Section Measurements of the 86Kr(g,n) Reaction to Probe the s-Process Branching at 85Kr
• He-detonation in sub-Chandrasekhar CO white dwarfs: a new insight into energetics and p-process nucleosynthesis
• Testing the role of SNe Ia for Galactic chemical evolution of p-nuclei with 2D models and with s-process seeds at different metallicities
• Opportunities to constrain astrophysical reaction rates for the s-process through determination of the ground state cross sections
• Photoneutron cross sections for Ni isotopes: Toward understanding $(n,\gamma )$ cross sections relevant to the weak s-process nucleosynthesis
• Induced Polarization in the ${}^2$H($\gamma ,\vec{n}$)${}^1$H Reaction at Low Energy
• Characterization of an INVS Model IV Neutron Counter for High Precision ($\gamma ,n$) Cross-Section Measurements

Cited by in corpus (6)

• Reference Database for Photon Strength Functions
• Horizons: Nuclear Astrophysics in the 2020s and Beyond
• The Status and Future of Direct Nuclear Reaction Measurements for Stellar Burning
• Progress of photonuclear cross sections for medical radioisotope production at the SLEGS energy domain
• The ${}^3$He BF${}_3$ Giant Barrel (HeBGB) Neutron Detector
• Constraining the Synthesis of the Lightest p Nucleus 74Se