Simulations show magnetar giant flares produce nuclei near r-process peaks whose decays create bright MeV gamma-ray lines from 88Kr and 92Sr with fluxes above 10^-8 erg cm^-2 s^-1.
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The paper develops a search algorithm to find observable MeV gamma-ray peaks from r-process isotope decays in mergers and shows Rh-106 can distinguish main versus weak r-process while Tl-208 remains robust across model variations.
Treating select nuclear isomers as independent states with temperature-dependent rates in r-process networks yields predictions that the 743.3 keV Nb-97m and 555.6 keV Y-91m lines may be detectable at galactic distances by COSI, AMEGO, or LOX.
citing papers explorer
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MeV Gamma-Ray Lines from Radioactive Nuclei in Magnetar Giant Flares
Simulations show magnetar giant flares produce nuclei near r-process peaks whose decays create bright MeV gamma-ray lines from 88Kr and 92Sr with fluxes above 10^-8 erg cm^-2 s^-1.
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Identifying observable MeV lines from the decays of weak and main $r$-process isotopes in mergers
The paper develops a search algorithm to find observable MeV gamma-ray peaks from r-process isotope decays in mergers and shows Rh-106 can distinguish main versus weak r-process while Tl-208 remains robust across model variations.
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Nuclear Isomers and Their Impact on Gamma-Ray Emission in Binary Neutron Star Mergers
Treating select nuclear isomers as independent states with temperature-dependent rates in r-process networks yields predictions that the 743.3 keV Nb-97m and 555.6 keV Y-91m lines may be detectable at galactic distances by COSI, AMEGO, or LOX.