Structural Characterization of Iron Meteorites through Neutron Tomography

Nickel Isotopes in Meteorites: Evidence for Live Fe and Distinct Ni Isotope Reservoirs in the Early Solar System

Introduction: With a half-life of 1.49 Myr, the Fe-Ni decay scheme is ideally suited for dating meteorites and planetary processes that occurred in the first 10Myr of the Solar System [1]. Further, Ni possesses two neutron-rich isotopes, Ni and Ni, considered to be produced through nuclear statistical equilibrium processes occurring in neutron-rich supernova ejecta [2]. Both excesses and defici...

The Neutron Pile as a Tool in Quantitative Analysis; The Gallium and Palladium Content of Iron Meteorites.

Coupled W–Os–Pt isotope systematics in IVB iron meteorites: In situ neutron dosimetry for W isotope chronology

Tungsten isotope compositions of magmatic iron meteorites yield ages of differentiation that are within 72 Ma of the formation of CAIs, with the exception of IVB irons that plot to systematically less radiogenic compositions yielding erroneously old ages. Secondary neutron capture due to galactic cosmic ray (GCR) irradiation is known to lower the eW of iron meteorites, adequate correction of wh...

Detection of Iron Overload through Neutron Stimulated Emission Computed Tomography: A Sensitivity Analysis Study

Neutron stimulated emission computed tomography (NSECT) is being developed as a non-invasive technique to diagnose iron overload in the liver. It uses inelastic scatter interactions between fast neutrons and iron nuclei to quantify localized distributions of iron within the liver. Preliminary studies have demonstrated the feasibility of iron overload detection through NSECT using a Monte-Carlo ...

Cosmogenic Stable Isotope Effects in Carbo

Introduction: The 182 Hf– 182 W decay system (t 1/2 =9 My) is useful to date early Solar System processes, notably metal-silicate differentiation [1-10]. Hf-W systematics of refractory inclusions indicate that these objects formed with an initial 182 Hf/ 180 Hf ratio of ~1×10-4 and ε 182 W of –3.47 ± 0.20 [6]. Recent high precision studies revealed negative ε 182 W values relative to CAIs for s...