TY - JOUR

T1 - SYNTHESIS OF THE S-ONLY 122,123,124TE ISOTOPES AND THE SELECTIVE DEPLETION OF 123TE BY ELECTRON CAPTURE PROCESS IN MASSIVE STARS

AU - Takahashi, K.

AU - Blaum, K.

AU - Novikov, Yu.

PY - 2016

Y1 - 2016

N2 - We investigate the production ratios of the naturally occurring s-only nuclides ${}^{122-124}$Te by solving a nuclear network in the mass number $120\leqslant A\leqslant 124$ region under some conditions representing those in the helium–hydrogen inter-shell in low-mass AGB stars as well as those in the helium burning and the carbon burning phases in massive stars. We show that the electron-capture process on 123Te (the natural half-life $\gt {10}^{16}$ years) could proceed decisively fast during the late evolutionary phases of massive stars. We thus re-iterate and re-enforce the decades-old notion that detailed analysis of the relative ${}^{122-124}$Te abundances in due consideration of the selective 123Te depletion in massive stars would set a stringent constraint on the s-process modelings. We stress that the relative abundance ratios of ${}^{122-124}$Te in the solar system become quite difficult to decipher if the s-process in massive stars contributes significantly to the synthesis of nuclides in this intermediate A region.

AB - We investigate the production ratios of the naturally occurring s-only nuclides ${}^{122-124}$Te by solving a nuclear network in the mass number $120\leqslant A\leqslant 124$ region under some conditions representing those in the helium–hydrogen inter-shell in low-mass AGB stars as well as those in the helium burning and the carbon burning phases in massive stars. We show that the electron-capture process on 123Te (the natural half-life $\gt {10}^{16}$ years) could proceed decisively fast during the late evolutionary phases of massive stars. We thus re-iterate and re-enforce the decades-old notion that detailed analysis of the relative ${}^{122-124}$Te abundances in due consideration of the selective 123Te depletion in massive stars would set a stringent constraint on the s-process modelings. We stress that the relative abundance ratios of ${}^{122-124}$Te in the solar system become quite difficult to decipher if the s-process in massive stars contributes significantly to the synthesis of nuclides in this intermediate A region.

U2 - 10.3847/0004-637X/819/2/118

DO - 10.3847/0004-637X/819/2/118

M3 - Article

VL - 819

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 118

ER -