138La-138Ce-136Ce nuclear cosmochronometer of supernova neutrino process

Abstract

The 138La (T1/2=102 Gyr) - 138Ce - 136Ce system is proposed to be used as a nuclear cosmochronometer for measuring the time elapsed from a supernova neutrino process. This chronometer is applied to examine a sample affected by a single nucleosynthesis episode as presolar grains in primitive meteorites. A feature of this chronometer is to evaluate the initial abundance ratio of 136Ce/138Ce using an empirical scaling law, which was found in the solar abundances. We calculate the age of the sample as a function of isotopic ratios, 136Ce/138Ce, and 138La/138Ce, and evaluate the age uncertainty due to theoretical and observational errors. It is concluded that this chronometer can work well for a sample with the abundance ratio of 138La/138Ce >= 20 when the ratios of 136Ce/138Ce and 138La/138Ce are measured within the uncertainty of 20%. The availability of such samples becomes clear in recent studies of the presolar grains. We also discuss the effect of the nuclear structure to the neutrino process origin of 138La.

arXiv comment13 pages, 6 figures

References in corpus (10)

• Nucleosynthesis in Massive Stars With Improved Nuclear and Stellar Physics
• Neutrino-induced nucleosynthesis of A>64 nuclei: The nu p-process
• Measurement of stellar age from uranium decay
• Nucleosynthesis in Early Supernova Winds II: The Role of Neutrinos
• Neutrino Nucleosynthesis
• Th Ages for Metal-Poor Stars
• Supernova Neutrino Nucleosynthesis of Light Elements with Neutrino Oscillations
• Constraining the Spectrum of Supernova Neutrinos from Neutrino-Process-Induced Light-Element Synthesis
• Evidence for nucleosynthesis in supernova $\gamma$-process: Universal scaling on p-nuclei
• The puzzle of the synthesis of the rare nuclide 138La

Cited by in corpus (6)

• New estimate for the time-dependent thermal nucleosynthesis of ${}^{180}$Ta${}^m$
• Neutrino reactions on ${}^{138}$La and ${}^{180}$Ta via charged and neutral currents by the Quasi-particle Random Phase Approximation (QRPA)
• Comprehensive Analyses of the Neutrino-Process in the Core-collapsing Supernova
• Direct determination of the ${}^{138}$La $\beta$-decay $Q$ value using Penning trap mass spectrometry
• Neutrinos and Heavy Element Nucleosynthesis
• Comment on "138La-138Ce-136Ce nuclear cosmochronometer of the supernova neutrino process"