Results 51 to 60 of about 1,225 (202)

Multidisciplinary Analyses of Terrestrial Samples Used to Interpret an Inorganic Origin (Anhydrite:Ce3+) for the 304 and 325‐nm Doublet Fluorescence Detected by the Mars 2020 SHERLOC Instrument at Jezero Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Doublet fluorescence at 304 and 325‐nm under deep ultraviolet (DUV) excitation was detected on Mars at Jezero crater by the Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument onboard the Mars 2020 rover Perseverance.
N. C. Haney, R. V. Morris, R. S. Jakubek, J. V. Clark, J. I. Simon, W. P. Buckley, R. T. Downs, E. B. Rampe, R. M. G. Armytage, T. G. Graff, A. S. Burton, F. M. McCubbin, E. L. Berger, V. M. Tu, P. D. Casbeer, S. A. Mertzman, K. H. Williford, E. L. Scheller, T. Fornaro, S. Siljeström, A. Steele, K. P. Hand, T. J. Lapen   +22 more
wiley   +1 more source

Protracted Timescales for Nebular Processing of First-formed Solids in the Solar System

The Astrophysical Journal, 2023
The calcium–aluminum-rich inclusions (CAIs) from chondritic meteorites are the first solids formed in the solar system. Rim formation around CAIs marks a time period in early solar system history when CAIs existed as free-floating objects and had not yet
Prajkta Mane, Maitrayee Bose, Meenakshi Wadhwa, Céline Defouilloy   +3 more
doaj   +1 more source

Review of Analytical Lithium Detection and Quantification Methods Along the Lithium Value Chain

Applied Research, Volume 4, Issue 6, December 2025.
This article reviews a selection of suitable state‐of‐the‐art analytical methods for different scales of spatial resolution and detection of lithium for a variety of lithium‐bearing materials along the lithium value chain. The various materials differ greatly in terms of their lithium content by more than 5 orders of magnitude and also vary in their ...
Nico Kropp, Ralf Halama, Ralf B. Wehrspohn   +2 more
wiley   +1 more source

Kodai School on ‘Synthesis of Elements in Stars’

, 2010
A fundamental question in contemporary astrophysics is the origin of the elements. Cosmochemistry seeks to answer when, how and where the chemical elements arose.
Goswami, Aruna, Reddy, B. Eswar
core   +1 more source

Phosphorus and Sulfur Cosmochemistry: Implications for the Origins of Life

, 2006
Phosphorus is a key element for life. This work reviews the role of phosphorus in life. Theories on the origin of life are confounded by a lack of reactive phosphorus, and attempts to overcome the dearth of reactive phosphorus must employ unrealistic ...
Pasek, Matthew Adam
core   +4 more sources

Low‐Frequency Raman Spectra of Natural Pyrrhotites: Polarization Dependence for Its Lattice Modes

Journal of Raman Spectroscopy, Volume 56, Issue 12, Page 1529-1536, December 2025.
The present study found low‐wavenumber Raman modes of pyrrhotite Fe1‐xS at ~68, ~87, ~117, and ~230 cm−1 for the first time, thanks to a lab‐built Raman spectrometer, in which the optical path of the incident laser was purged by Ar gas. The sufficiently high signal‐to‐noise and signal‐to‐base ratios enabled us to obtain the polarization dependence of ...
Shu‐hei Urashima, Mana Kito, Shiori Nakajima, Kenichi Oguchi, Aruto Kashima, Hiroharu Yui   +5 more
wiley   +1 more source

Comparison of Two Methods for Determination of Rhenium and Platinum‐Group Elements in Meteorites Using On‐Line and Off‐Line Matrix Separation Modes

Geostandards and Geoanalytical Research, Volume 49, Issue 4, Page 737-750, December 2025.
Key Points PEEK tubing has been observed to adsorb Pd and Pt ions, resulting in significantly reduced recoveries of Pd and Pt elements. HPA‐S provides a more effective dissolution for meteorite samples than Carius tube digestion, resulting in higher mass fractions for PGE.
Yuling Zeng, Guiqin Wang, Thomas C. Meisel   +2 more
wiley   +1 more source

Aplications of PGE radioisotope systems in geo-and cosmochemistry

, 2008
The platinum-group elements contain three radioisotope systems that have been used in many and varied ways in geo- and cosmochemistry. Unique chronological applications include dating the formation of such diverse materials as sulfides, gold, organic ...
Shirey, Steven B., Schonbachler, Maria, Carlson, Richard W.   +2 more
core   +1 more source

Unimolecular Chemical Kinetics in the Interstellar Environment: Competition of Infrared Radiation and Collision Activation Mechanisms

The Astrophysical Journal
Unimolecular gas phase chemical reactions could be activated by both infrared (IR) radiation and intermolecular collision in the interstellar environment.
Xiaorui Zhao, Rui Ming Zhang, Xuefei Xu, Haitao Xu   +3 more
doaj   +1 more source

Iron Isotope Ratios of IAEA B5 Basalt and Whole‐Rock Reference Materials (JB‐2, BHVO‐2, AGV‐1, BE‐N and RGM‐1) Determined by Multi‐Collector Inductively Coupled Plasma‐Mass Spectrometry

Geostandards and Geoanalytical Research, Volume 49, Issue 4, Page 901-914, December 2025.
Key Points An Fe isotope measurement method using MC‐ICP‐MS was developed, improving data quality and interlaboratory data comparability. Fe isotope ratios were measured for five geological reference materials and new δ56Fe and δ57Fe values proposed for IAEA‐B5.
Paolo Di Giuseppe, Simone Vezzoni, Stefano Iannini Lelarge, Andrea Rielli, Samuele Agostini, Andrea Dini   +5 more
wiley   +1 more source