High-temperature ${}^{205}$Tl decay clarifies ${}^{205}$Pb dating in early Solar System

Abstract

Radioactive nuclei with lifetimes on the order of millions of years can reveal the formation history of the Sun and active nucleosynthesis occurring at the time and place of its birth. Among such nuclei whose decay signatures are found in the oldest meteorites, ${}^{205}$Pb is a powerful example, as it is produced exclusively by slow neutron captures (the s process), with most being synthesized in asymptotic giant branch (AGB) stars. However, making accurate abundance predictions for ${}^{205}$Pb has so far been impossible because the weak decay rates of ${}^{205}$Pb and ${}^{205}$Tl are very uncertain at stellar temperatures. To constrain these decay rates, we measured for the first time the bound-state ${\beta }^{-}$ decay of fully ionized ${}^{205}$Tl${}^{81+}$, an exotic decay mode that only occurs in highly charged ions. The measured half-life is 4.7 times longer than the previous theoretical estimate and our 10% experimental uncertainty has eliminated the main nuclear-physics limitation. With new, experimentally backed decay rates, we used AGB stellar models to calculate ${}^{205}$Pb yields. Propagating those yields with basic galactic chemical evolution (GCE) and comparing with the ${}^{205}$Pb/${}^{204}$Pb ratio from meteorites, we determined the isolation time of solar material inside its parent molecular cloud. We find positive isolation times that are consistent with the other s-process short-lived radioactive nuclei found in the early Solar System. Our results reaffirm the site of the Sun's birth as a long-lived, giant molecular cloud and support the use of the ${}^{205}$Pb--${}^{205}$Tl decay system as a chronometer in the early Solar System.

arXiv comment21 pages and 11 figures/tables. Published in Nature (2024)

References in corpus (44)

• The chemical composition of the Sun
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Shell Model as Unified View of Nuclear Structure
• The Dawes Review 2: Nucleosynthesis and stellar yields of low and intermediate-mass single stars
• Evolution, nucleosynthesis and yields of AGB stars at different metallicities (III): intermediate mass models, revised low mass models and the ph-FRUITY interface
• Stellar yields from metal-rich asymptotic giant branch models
• Galactic Chemical Evolution and solar s-process abundances: dependence on the 13C-pocket structure
• s Process in low-mass Asymptotic Giant Branch Stars
• Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
• Modified Empirical Parametrization of Fragmentation Cross Sections
• Short-lived Nuclei in the Early Solar System: Possible AGB Sources
• Observational constraints on the origin of the elements. IV: The standard composition of the Sun
• A perspective from extinct radionuclides on a Young Stellar Object: The Sun and its accretion disk
• Short-lived ${}^{244}$Pu Points to Compact Binary Mergers as Sites for Heavy r-process Nucleosynthesis
• Solar system genealogy revealed by extinct short-lived radionuclides in meteorites
• Radioactive nuclei from cosmochronology to habitability
• Helium enrichment and Carbon-star Production in Metal-rich Populations
• Al-26 and the formation of the Solar System from a molecular cloud contaminated by Wolf-Rayet winds
• Lead: Asymptotic Giant Branch production and Galactic Chemical Evolution
• Stellar origin of the 182Hf cosmochronometer and the presolar history of solar system matter
• Heavy-Ion Storage Rings and Their Use in Precision Experiments with Highly Charged Ions
• Application of a Theory and Simulation based Convective Boundary Mixing model for AGB Star Evolution and Nucleosynthesis
• Magnetic-buoyancy Induced Mixing in AGB Stars: Presolar SiC Grains
• The s Process and Beyond
• NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z=0.01, Z=0.02 and Z=0.03
• The production of short-lived radionuclides by new non-rotating and rotating Wolf-Rayet model stars
• Surround & Squash: The Interstellar Medium around Scorpius Centaurus OB2
• High-resolution measurement of the time-modulated orbital electron capture and of the ${\beta }^{+}$ decay of hydrogen-like ${}^{142}$Pm${}^{60+}$ ions
• BRUSLIB and NETGEN: the Brussels nuclear reaction rate library and nuclear network generator for astrophysics
• 129I and 247Cm in Meteorites Constrain the Last Astrophysical Source of Solar r-process Elements
• Re-evaluation of the ${}^{22}$Ne($\alpha ,\gamma$)${}^{26}$Mg and ${}^{22}$Ne($\alpha ,n$)${}^{25}$Mg reaction rates
• Opportunities to constrain astrophysical reaction rates for the s-process through determination of the ground state cross sections
• Galactic Chemical Evolution of Radioactive Isotopes
• Measurement of the neutron capture cross section of the s-only isotope 204Pb from 1 eV to 440 keV
• Measurement of the radiative neutron capture cross section of 206Pb and its astrophysical implications
• Magnetic-buoyancy-induced mixing in AGB Stars: fluorine nucleosynthesis at different metallicities
• On the Origin of the Early Solar System Radioactivities. Problems with the AGB and Massive Star Scenarios
• Stochastic Chemical Evolution of Radioactive Isotopes with a Monte Carlo Approach
• Properties of carbon stars in the Solar neighbourhood based on Gaia DR2 astrometry
• Turbulent mixing of r-process elements in the Milky Way
• The stellar beta-decay rate of 134Cs and its impact on the Barium nucleosynthesis in the s process
• Theoretical estimate of the half-life for the radioactive ${}^{134}$Cs and ${}^{135}$Cs in astrophysical scenarios
• Galactic Chemical Evolution of Radioactive Isotopes with an s-process Contribution
• Inhomogeneous enrichment of radioactive nuclei in the Galaxy: Deposition of live Mn-53, Fe-60, Hf-182, and Pu-244 into deep-sea archives. Surfing the wave?

Cited by in corpus (7)

• Bound-State Beta Decay of ${}^{205}{\mathrm{Tl}}^{81+}$ Ions and the LOREX Project
• Impact of $\text{T}$- and $\rho$-dependent decay rates and new (n,$\gamma$) cross sections on the $\text{s}$ process in low-mass AGB stars
• Half-life determination of heavy ions in a storage ring considering feeding and depleting background processes
• Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $\beta$ decay of ${}^{205}{\mathrm{Tl}}^{81+}$
• Schottky detection techniques for ultra-rare short-lived ions in heavy ion storage rings
• Software Defined Radio for on-line interaction with beam processes in the heavy ion storage ring ESR
• A novel method of half-life determination for highly charged ions based on isochronous mass spectrometry