Allowed Gamow-Teller strength distributions and stellar electron capture rates on odd-A nuclei
نویسندگان
چکیده
منابع مشابه
Gamow-Teller strength distributions for nuclei in presupernova stellar cores.
Electron-capture and β-decay of nuclei in the core of massive stars play an important role in the stages leading to a type II supernova explosion. Nuclei in the f-p shell are particularly important for these reactions in the post Siliconburning stage of a presupernova star. In this paper, we characterise the energy distribution of the Gamow-Teller Giant Resonance (GTGR) for midfp-shell nuclei i...
متن کاملGamow-Teller strength distributions in fp-shell nuclei
P. B. Radha,* D. J. Dean, S. E. Koonin, K. Langanke, and P. Vogel W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 Physics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37381 Institut for Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark Division of Physics, Mathematics and Astronomy, Californi...
متن کاملGamow-Teller strengths and electron-capture rates for p f -shell nuclei of relevance for late stellar evolution
Background: Electron-capture reaction rates on medium-heavy nuclei are an important ingredient for modeling the late evolution of stars that become core-collapse or thermonuclear supernovae. The estimation of these rates requires the knowledge of Gamow-Teller strength distributions in the β+ direction. Astrophysical models rely on electron-capture rate tables largely based on theoretical models...
متن کاملβ+ Gamow-Teller transition strengths from 46Ti and stellar electron-capture rates.
The Gamow-Teller strength in the β(+) direction to (46)Sc was extracted via the (46)Ti(t,(3)He + γ) reaction at 115 MeV/u. The γ-ray coincidences served to precisely measure the very weak Gamow-Teller transition to a final state at 991 keV. Although this transition is weak, it is crucial for accurately estimating electron-capture rates in astrophysical scenarios with relatively low stellar den...
متن کاملA / I ? + Gamow - Teller strength in nuclei
The distribution of p+ Gamow-Teller strength in 26Mg, 54Fe and 56Ni is calculated in the QRPA and large-basis shell-model spaces. The quenching relative to the simplest jj coupled model found in the QRPA is similar to that found in a shell-model basis which includes 2p2h ground-state correlations within the major shell (sd or pf). For 26Mg there is significant additional quenching found in the ...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics: Conference Series
سال: 2019
ISSN: 2010-1945
DOI: 10.1142/s2010194519600097