CaNPAN in collaboration with JINA/CeNAM and NuGrid under the umbrella of IReNA is performing nuclear astrophysics impact studies that determine the most important nuclear physics requirements for astrophysical simulations of dynamic origin of the element scenarios, such as the i process. This theoretical nuclear astrophysics activity requires input from nuclear physics and astrophysics and is key to identify the most impactful nuclear physics experiments to address problems at the frontier of nuclear astrophysics. Recent CaNPAN/JINA-CEE/NuGrid studies on the specific nuclear physics impact for the i process are
The following nuclear physics experiments are based on these impact studies (as of May 2023):
Proposal Number PI Title Species (n,g)
ANL-1734 Ann-Cecilie Larsen The rare-earth r-process peak: 156-159Sm(n,γ) reaction rates 155-157Sm
constrained with the beta-Oslo method
ANL-1742 Artemis Spyrou Constraints on neutron-capture reactions around N=82 138Ba, 139Ba
ANL-1755 Sean Liddick Neutron-capture cross section constraints in neutron-rich 132Sb, 128-129Sn
Sn and Sb isotopes
ANL-1799 Stephanie Lyons Constraining neutron-capture cross sections for the i-process 87-89Kr
ANL-1807 Mallory Smith Investigating gamma-ray strength functions and nuclear level 96-97Zr, 99Zr
densities in neutron-rich Zr isotopes
ANL-1812 Adriana Sweet Neutron-capture cross sections for heavy-mass fission 93-95Sr
fragments constrained with the β-Oslo method
ANL-1928 Hannah Berg Constraining neutron-capture cross section for the i-process 151-153Nd
around A=150
ANL-1929 Andrea Richard Neutron-capture constraints for the astrophysical i-process 140Ba, 144Ce, 146Ce
ANL-2018 Andrea Richard Constraining i-Process Nucleosynthesis in the Nb-Ru Region 99-101Mo
ANL-2055 Erin Good Astrophysical i-process constraints via the β-Oslo method 85Kr, 86Br, 92Rb
ANL-e1928 Andrea Richard Neutron-capture constraints for the Astrophysical i-process 140Ba, 144Ce, 146Ce
ANL-e1929 Hannah Berg Constraining neutron-capture cross sections for the i-process 151-153Nd
around A=150
ANL-e2018 Andrea Richard Constraining i-Process Nucleosynthesis in the Nb-Ru Region 99-101Mo
FRIB-23084 Steve Pain Informing the i process: constraining the As/Ge abundance 75Ga
ratio in a metal poor star via 75Ga(d,pg)76Ga
FRIB-e23004 Eleanor Ronning The Last Piece of the Generalized Brink Axel Hypothesis 69Zn, 96Zr
FRIB-e23056 Andrea Richard Indirect 99Nb(n,g)100Nb Constraint for the Astrophysical 99Nb
i-process
Nicholas Scielzo Determination of the 92Sr(n,g) cross section and fission 92Sr
product burn up
NSCL-e16033 Artemis Spyrou Study of Kr isotopes for astrophysical applications 85Kr
NSCL-e17014 Sean Liddick Photon strength function following the decay of 70Cu 70Cu
TRIUMF-S1893 Richard Hughes Determining the Neutron Capture Cross Section for 93Sr
Unstable 93Sr Via the Surrogate Method
TRIUMF-S1944 Denis Mücher Constraining neutron capture rates for the astrophysical 139Ba, 137,139Cs
i process
TRIUMF-S2303 Matthew Williams Can an i-process explain high [As/Ge] ratios seen 75Ga
in metal-poor stars?
ANL-2128 Konstantinos Constraining neutron-capture reaction cross sections for 137Xe, 138Cs, 143Ce
Bosmpotinis the i process at the A=138-144 region
- Denissenkov P. A., Herwig F., Perdikakis G., Schatz H. 2021. The impact of (n,γ) reaction rate uncertainties of unstable isotopes on the i-process nucleosynthesis of the elements from Ba to W. Monthly Notices of the Royal Astronomical Society. 503:3913.
- Denissenkov P., Perdikakis G., Herwig F., Schatz H., Ritter C., Pignatari M., Jones S., Nikas S., Spyrou A. 2018. The impact of (n,γ) reaction rate uncertainties of unstable isotopes near N = 50 on the i-process nucleosynthesis in He-shell flash white dwarfs. Journal of Physics G Nuclear Physics. 45:055203.
- McKay J. E., Denissenkov P. A., Herwig F., Perdikakis G., Schatz H. 2020. The impact of (n,γ) reaction rate uncertainties on the predicted abundances of I-process elements with 32 ≤ Z ≤ 48 in the metal-poor star HD94028. Monthly Notices of the Royal Astronomical Society. 491:5179.
The following nuclear physics experiments are based on these impact studies (as of May 2023):
Proposal Number PI Title Species (n,g)
ANL-1734 Ann-Cecilie Larsen The rare-earth r-process peak: 156-159Sm(n,γ) reaction rates 155-157Sm
constrained with the beta-Oslo method
ANL-1742 Artemis Spyrou Constraints on neutron-capture reactions around N=82 138Ba, 139Ba
ANL-1755 Sean Liddick Neutron-capture cross section constraints in neutron-rich 132Sb, 128-129Sn
Sn and Sb isotopes
ANL-1799 Stephanie Lyons Constraining neutron-capture cross sections for the i-process 87-89Kr
ANL-1807 Mallory Smith Investigating gamma-ray strength functions and nuclear level 96-97Zr, 99Zr
densities in neutron-rich Zr isotopes
ANL-1812 Adriana Sweet Neutron-capture cross sections for heavy-mass fission 93-95Sr
fragments constrained with the β-Oslo method
ANL-1928 Hannah Berg Constraining neutron-capture cross section for the i-process 151-153Nd
around A=150
ANL-1929 Andrea Richard Neutron-capture constraints for the astrophysical i-process 140Ba, 144Ce, 146Ce
ANL-2018 Andrea Richard Constraining i-Process Nucleosynthesis in the Nb-Ru Region 99-101Mo
ANL-2055 Erin Good Astrophysical i-process constraints via the β-Oslo method 85Kr, 86Br, 92Rb
ANL-e1928 Andrea Richard Neutron-capture constraints for the Astrophysical i-process 140Ba, 144Ce, 146Ce
ANL-e1929 Hannah Berg Constraining neutron-capture cross sections for the i-process 151-153Nd
around A=150
ANL-e2018 Andrea Richard Constraining i-Process Nucleosynthesis in the Nb-Ru Region 99-101Mo
FRIB-23084 Steve Pain Informing the i process: constraining the As/Ge abundance 75Ga
ratio in a metal poor star via 75Ga(d,pg)76Ga
FRIB-e23004 Eleanor Ronning The Last Piece of the Generalized Brink Axel Hypothesis 69Zn, 96Zr
FRIB-e23056 Andrea Richard Indirect 99Nb(n,g)100Nb Constraint for the Astrophysical 99Nb
i-process
Nicholas Scielzo Determination of the 92Sr(n,g) cross section and fission 92Sr
product burn up
NSCL-e16033 Artemis Spyrou Study of Kr isotopes for astrophysical applications 85Kr
NSCL-e17014 Sean Liddick Photon strength function following the decay of 70Cu 70Cu
TRIUMF-S1893 Richard Hughes Determining the Neutron Capture Cross Section for 93Sr
Unstable 93Sr Via the Surrogate Method
TRIUMF-S1944 Denis Mücher Constraining neutron capture rates for the astrophysical 139Ba, 137,139Cs
i process
TRIUMF-S2303 Matthew Williams Can an i-process explain high [As/Ge] ratios seen 75Ga
in metal-poor stars?
ANL-2128 Konstantinos Constraining neutron-capture reaction cross sections for 137Xe, 138Cs, 143Ce
Bosmpotinis the i process at the A=138-144 region