Nuclear astrophysics capabilities of the GRIPS telescope

GRIPS is an envisioned space telescope for Gamma-Ray burst Investigation via Polarimetry and Spectroscopy. It will be capable of imaging gamma rays in the energy range from roughly 200 keV up to at least 50 MeV via Compton scattering and pair creation.GRIPS will also provide unprecedented sensitivities for nuclear-line science. With a field-of-view of roughly 50° HWHM, energy resolutions of ∼5% FWHM at 511 keV and ∼2% at 1809 keV, angular resolutions of 3.3° at 511 keV and 1.4° at 1809 keV, and effective areas after background cuts of ∼450 cm2 at 511 keV and ∼200 cm2 at 1809 keV, GRIPS will achieve all-sky narrow-line point-source sensitivities of 9 × 10−6 ph/cm2/s for 511 keV and 4 × 10−7 ph/cm2/s at 1809 keV after five years mission time.