Lithium, beryllium, and boron production in core-collapse supernovae

Type Ic supernova (SN Ic) is the gravitational collapse of a massive star without H and He layers. It propels several solar masses of material to the typical velocity of 10,000 km/s, a very small fraction of the ejecta nearly to the speed of light. We investigate SNe Ic as production sites for the light elements Li, Be, and B, via the neutrino-process and spallations. As massive stars collapse, neutrinos are emitted in large numbers from the central remnants. Some of the neutrinos interact with nuclei in the exploding materials and mainly ⁷ Li and ¹¹ B are produced. Subsequently, the ejected materials with very high energy impinge on the interstel-lar/circumstellar matter and spall into light elements. We find that the ν-process in the current SN Ic model produces a significant amount of ¹¹ B, consistent with observations if combined with B isotopes from the following spallation production.