Nuclear isotope thermometry

N ov 1 99 8 Isotope thermometry in nuclear multifragmentation

A systematic study of the effect of fragment−fragment interaction, quantum statistics, γ-feeding and collective flow is made in the extraction of the nuclear temperature from the double ratio of the isotopic yields in the statistical model of one-step (Prompt) multifragmentation. Temperature is also extracted from the isotope yield ratios generated in the sequential binary-decay model. Comparis...

Isotopic trends in nuclear multifragmentation

An overview of the recent progress in the studies of nuclear multifragmentation is presented. Special emphasis is put on the exploration of isotopic trends in nuclear multifragmentation and the possibilities to extract physical information related to the nuclear equation of state. Relevant experimental methods of isotope identification are described. The isotopic composition of fragments is use...

Use of Clumped-isotope Thermometry to Constrain the Crystallization Temperature of Diagenetic Calcite

We describe an approach to estimating the crystallization temperatures of diagenetic calcites using clumped-isotope thermometry, a paleothermometer based on the C–O-bond enrichment in carbonates. Application of this thermometer to calcified gastropod shells and calcite cements in an early Eocene limestone from the Colorado Plateau reveals a record of calcite precipitation and replacement at tem...

Spinel–olivine magnesium isotope thermometry in the mantle and implications for the Mg isotopic composition of Earth

Temperatures of Aqueous Alteration on Cm Chondrite Parent Bodies Based on Carbonate ‘clumped-isotope’ Thermometry

Introduction: Aqueous alteration of primitive meteorites was among the earliest differentiation processes in the solar system [1], and a better understanding of it would help constrain and test models of the thermal and chemical evolution of planetesimals. One of the challenges is to establish the temperatures of alteration. Petrographic analysis of CM matrices [2] suggest their temperatures of...