13-17 June 2016
Niigata University (Ikarashi Campus)
Asia/Tokyo timezone

Impact of New GT Strengths on Explosive SN Ia Nucleosynthesis

15 Jun 2016, 16:30
1h 30m
Library Hall, Central Library (Niigata University (Ikarashi Campus))

Library Hall, Central Library

Niigata University (Ikarashi Campus)

Central Library, Niigata University (Ikarashi Campus), 8050 Ikarashi 2-nocho, Nishi-ku Niigata City, 950-2181, Japan
Board: 5
Poster Presentation Posters


Mr Kanji Mori (the University of Tokyo)


Recent experimental results have confirmed a possible reduction in the GT+ strengths of pf-shell nuclei. These proton-rich nuclei are of relevance in the deflagration and delayed-detonation and explosive burning phases of Type Ia supernovae (SNe Ia). While prior GT strengths result in nucleosynthesis predictions with a higher-than-expected neutron-excess isotopes for the elements Cr-Mn-Fe-Co-Ni even in a best SN Ia model W7 [1], a reduction in the GT+ strength can result in a reduced abundance of these neutron-rich nuclei. A new generation of shell model parametrization [2] has been developed which more closely matches experimental GT strengths [3]. The resultant electron-capture rates are used in nucleosynthesis calculations for carbon deflagration and delayed-detonation explosion phases of Type Ia supernovae, and the final mass-fractions are compared to those obtained using more commonly-used rates [4]. [1] K. Iwamoto et al., Astrophys. J. Suppl. 125, 439 (1999). [2] T. Suzuki, M. Honma, H. Mao, T. Otsuka and T. Kajino, Phys. Rev. C 83, 044619 (2011). [3] M. Sasano et al. PRL 107, 202501 (2011); Phys. Rev. C86, 034324 (2012). [4] K. Mori, M. A. Famiano, T. Kajino, T. Suzuki, J. Hidaka, M. Honma, T. Otsuka, K. Iwamoto and K. Nomoto in preparation.

Primary author

Mr Kanji Mori (the University of Tokyo)


Prof. Jun Hidaka (Mesei University) Prof. Ken'ichi Nomoto (Kavli IPMU, The University of Tokyo) Dr Koichi Iwamoto (Department of Physics, College of Science and Technology, Nihon University) Prof. Michael Famiano (Western Michigan University) Prof. Michio Honma (University of Aizu) Prof. Taka Kajino (NAOJ, University of Tokyo) Prof. Takaharu Otsuka (University of Tokyo) Prof. Toshio Suzuki (Nihon University)

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