We have examined explosive nucleosynthesis ofp-nuclei during a neutrino-driven, aspherical supernova aided by both convection and standing accretion shock instability, based on a two-dimensional hydrodynamic simulation of the explosion of a 15Mȯ star, with an explosion energy of ∼ 10 51ergs. We find thatp-nuclei are mainly produced by γ-processes, and that the nuclei lighter than 92Mo are abundantly synthesized in slightly neutron-rich bubbles with electron fractions of Ye ≤ 0.48, although masses of the bubbles are highly uncertain in the current hydrodynamic simulation. Abundances of thep-nuclei are comparable to those in a spherical model, and nuclei, 94Mo, 96Ru, and 98Ru, are underproduced compared with the solar system for our aspherical models, as in a spherical model. 138La and 180Ta, which are underproduced in the model are abundantly produced by charged current neutrino-interactions with 138Ba and 180Hf, respectively.
|ジャーナル||Proceedings of Science|
|出版ステータス||出版済み - 2012|
|イベント||12th International Symposium on Nuclei in the Cosmos, NIC 2012 - Cairns, QLD, オーストラリア|
継続期間: 8 5 2012 → 8 12 2012
All Science Journal Classification (ASJC) codes