NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Noble gas trapping by laboratory carbon condensatesTrapping of noble gases by carbon-rich matter was investigated by synthesizing carbon condensates in a noble gas atmosphere. Laser evaporation of a solid carbon target yielded submicron grains which proved to be efficient noble gas trappers (Xe distribution coefficients up to 13 cu cm STP/g-atm). The carbon condensates are better noble gas trappers than previously reported synthetic samples, except one, but coefficients inferred for meteoritic acid-residues are still orders of magnitude higher. The trapped noble gases are loosely bound and elementally strongly fractionated, but isotopic fractionations were not detected. Although this experiment does not simulate nebular conditions, the results support the evidence that carbon-rich phases in meteorites may be carriers of noble gases from early solar system reservoirs. The trapped elemental noble gas fractionations are remarkably similar to both those inferred for meteorites and those of planetary atmospheres for earth, Mars and Venus.
Document ID
19820048220
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Niemeyer, S.
(California Univ. La Jolla, CA, United States)
Marti, K.
(California, University La Jolla, CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Inorganic And Physical Chemistry
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 16, 1981
End Date: March 20, 1981
Accession Number
82A31755
Funding Number(s)
CONTRACT_GRANT: NGL-05-009-150
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available