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Canadian Nuclear Physics for Astrophysics Network
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Experiments based on CaNPAN work

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
  • 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-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
NSCL-e15136              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 
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