Evidence for supernova injection into the solar nebula and the decoupling of r-process nucleosynthesis

GA Brennecka, LE Borg… - Proceedings of the …, 2013 - National Acad Sciences
The isotopic composition of our Solar System reflects the blending of materials derived from
numerous past nucleosynthetic events, each characterized by a distinct isotopic signature …

Lithium isotope composition of ordinary and carbonaceous chondrites, and differentiated planetary bodies: Bulk solar system and solar reservoirs

HM Seitz, GP Brey, J Zipfel, U Ott, S Weyer… - Earth and Planetary …, 2007 - Elsevier
In order to better constrain the Li isotope composition of the bulk solar system and Li isotope
fractionation during accretion and parent body processes, Li isotope compositions and …

Interstellar exposure ages of large presolar SiC grains from the Murchison meteorite

F Gyngard, S Amari, E Zinner, U Ott - The Astrophysical Journal, 2009 - iopscience.iop.org
We report the Li isotopic compositions of nine large, greater than 5 μm, presolar SiC grains
from the Murchison (CM) meteorite. Most of the SiC grains analyzed are isotopically similar …

Titanium isotopic compositions of rare presolar SiC grain types from the Murchison meteorite

AN Nguyen, LR Nittler, CMOD Alexander… - … et Cosmochimica Acta, 2018 - Elsevier
We report the Ti isotopic compositions of 8 mainstream, 22 Y, 9 Z, and 26 AB presolar SiC
grains from two SiC-rich residues of the Murchison CM2 meteorite together with Si, C and …

Evidence for lithium and boron from star‐forming regions implanted in presolar SiC grains

IC Lyon, JM Tizard, T Henkel - Meteoritics & Planetary Science, 2007 - Wiley Online Library
We report the first measurements of lithium and boron isotope ratios and abundances
measured in “gently separated” presolar SiC grains. Almost all analyses of presolar SiC …

3‐D elemental and isotopic composition of presolar silicon carbides

T Henkel, T Stephan, EK Jessberger… - … & Planetary Science, 2007 - Wiley Online Library
Thirteen presolar silicon carbide grains—three of supernova (SN) origin and ten of
asymptotic giant branch (AGB) star origin—were examined with time‐of‐flight‐secondary ion …

Trace element depth profiles in presolar silicon carbide grains

AJ King, T Henkel, D Rost… - Meteoritics & Planetary …, 2012 - Wiley Online Library
We have analyzed eleven presolar SiC grains from the Murchison meteorite using time‐of‐
flight secondary ion mass spectrometry. The Si isotopic compositions of the grains indicate …

[图书][B] Uranium Isotope Variations in Nature: Mechanisms, Applications, and Implications

GA Brennecka - 2011 - search.proquest.com
Historically, uranium has received intense study of its chemical and isotopic properties for
use in the nuclear industry, but has been largely ignored by geoscientists despite properties …

Geochemical and cosmochemical materials

ME Lipschutz, SF Wolf, FB Culp, AJR Kent - Analytical chemistry, 2007 - ACS Publications
This review surveys the literature on the chemical analysis of terrestrial and extraterrestrial
solids for the 2-year period October 2004 through September 2006. We continue to include …

[图书][B] Pb-Pb isotopic and X-ray tomographic constraints on the origin of chondrules

CRJ Charles - 2013 - search.proquest.com
Abstract 207 Pb*/206 Pb* chronometry was used to obtain the ages of Ca, Al-rich inclusions
(CAIs) and chondrules found in ancient meteorites. Assuming a 238 U/235 U= 137.88 …