Xenon in Chondritic Metal

1989 ◽  
Vol 44 (10) ◽  
pp. 963-967 ◽  
Author(s):  
K. Marti ◽  
J. S. Kim ◽  
B. Lavielle ◽  
P. Pellas ◽  
C. Perron
Keyword(s):  
Solar System ◽  
Noble Gases ◽  
Cosmic Ray ◽  
Isotopic Shifts ◽  
Isotopic Abundances

Abstract We report xenon isotopic abundances observed in the stepwise release of noble gases in a highpurity metal separate of the Forest Vale (H4) chondrite. We identify a 244Pu-derived fission component, due to recoils into the metal, a cosmic-ray-produced spallation component and a new trapped component (FVM; 132Xe: 134Xe: 136Xe = 3.16:1.235:1.000) which is isotopically distinct from known solar system reservoirs. We discuss several processes which might account for observed isotopic shifts and conclude that the signature of FVM xenon may provide clues regarding the origin of chondritic metal.

Cosmic-ray induced production of radioactive noble gases in the atmosphere, ground, and seawater

2015 ◽  
Vol 305 (1) ◽  
pp. 183-192 ◽  
Author(s):  
William H. Wilson ◽  
Christine M. Johnson ◽  
Justin D. Lowrey ◽  
Steven R. Biegalski ◽  
Derek A. Haas
Keyword(s):  
Noble Gases ◽  
Cosmic Ray

scholarly journals Cosmic-Ray Record in Solar System Matter

1983 ◽  
Vol 33 (1) ◽  
pp. 505-538 ◽  
Author(s):  
R C Reedy ◽  
J R Arnold ◽  
D Lal
Keyword(s):  
Solar System ◽  
Cosmic Ray

scholarly journals Chemical reactions in the nitrogen–acetone ice induced by cosmic ray analogues: relevance for the Solar system

2017 ◽  
Vol 474 (2) ◽  
pp. 1469-1481
Author(s):  
A. L. F. de Barros ◽  
D. P. P. Andrade ◽  
E. F. da Silveira ◽  
K. F. Alcantara ◽  
P. Boduch ◽  
...  
Keyword(s):  
Solar System ◽  
Chemical Reactions ◽  
Cosmic Ray

A New Determination of Muon Directional Coupling Coefficients

1968 ◽  
Vol 1 (4) ◽  
pp. 154-157
Author(s):  
D. J. Cooke ◽  
A. G. Fenton
Keyword(s):  
Cosmic Rays ◽  
Solar System ◽  
Cosmic Ray ◽  
Accurate Information ◽  
Coupling Coefficients ◽  
The Earth ◽  
Directional Coupling ◽  
Cosmic Ray Flux ◽  
Primary Cosmic Rays

Primary cosmic rays passing through the solar system carry with them valuable information about solar and astrophysical phenomena in the form of intensity and spectral variations. In order that this information be efficiently extracted from observations of the directional cosmic-ray flux at the surface of the Earth, it is essential to have accurate information available to enable the relating of the observed secondary cosmic-ray directions of motion and intensity to those outside the range of the disturbing terrestrial influences.

Carbonaceous chondrite meteorites experienced fluid flow within the past million years

Science ◽  
2021 ◽  
Vol 371 (6525) ◽  
pp. 164-167
Author(s):  
Simon Turner ◽  
Lucy McGee ◽  
Munir Humayun ◽  
John Creech ◽  
Brigitte Zanda
Keyword(s):  
Fluid Flow ◽  
Solar System ◽  
Cosmic Ray ◽  
Parent Body ◽  
Uranium Isotopes ◽  
The Past ◽  
Uranium Ion ◽  
Impact Heating ◽  
The Impact ◽  
Cosmic Ray Exposure Age

Carbonaceous chondritic meteorites are primordial Solar System materials and a source of water delivery to Earth. Fluid flow on the parent bodies of these meteorites is known to have occurred very early in Solar System history (first <4 million years). We analyze short-lived uranium isotopes in carbonaceous chondrites, finding excesses of 234-uranium over 238-uranium and 238-uranium over 230-thorium. These indicate that the fluid-mobile uranium ion U6+ moved within the past few 100,000 years. In some meteorites, this time scale is less than the cosmic-ray exposure age, which measures when they were ejected from their parent body into space. Fluid flow occurred after melting of ice, potentially by impact heating, solar heating, or atmospheric ablation. We favor the impact heating hypothesis, which implies that the parent bodies still contain ice.

scholarly journals Molecules in Comets: A Tool to Estimate the Low Energy Cosmic Ray Flux Outside the Solar System?

1987 ◽  
Vol 120 ◽  
pp. 443-445
Author(s):  
Valerio Pirronello
Keyword(s):  
Solar System ◽  
Chemical Species ◽  
Cosmic Ray ◽  
Low Energy ◽  
Chemical Modifications ◽  
Cometary Nuclei ◽  
First Time ◽  
Cosmic Ray Flux

It is described a method for evaluating the low energy cosmic ray flux outside the heliosphere. It is based on the chemical modifications induced in cometary nuclei by impinging ions and on the release of synthesized chemical species by comets entering for the first time into the inner solar system.

Cosmic ray hazards in the solar system

AIAA Journal ◽  
1965 ◽  
Vol 3 (2) ◽  
pp. 193-201
Author(s):  
S. N. MlLFORD
Keyword(s):  
Solar System ◽  
Cosmic Ray
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