Calibration of cosmogenic noble gas production in ordinary chondrites based on36Cl-36Ar ages. Part 1: Refined produced rates for cosmogenic21Ne and38Ar

2013 ◽  
Vol 48 (10) ◽  
pp. 1841-1862 ◽  
Author(s):  
N. Dalcher ◽  
M. W. Caffee ◽  
K. Nishiizumi ◽  
K. C. Welten ◽  
N. Vogel ◽  
...  
Keyword(s):  
Noble Gas ◽  
Gas Production ◽  
Ordinary Chondrites

scholarly journals Calibration of cosmogenic noble gas production based on36Cl-36Ar ages. Part 2. The81Kr-Kr dating technique

2015 ◽  
Vol 50 (11) ◽  
pp. 1863-1879 ◽  
Author(s):  
I. Leya ◽  
N. Dalcher ◽  
N. Vogel ◽  
R. Wieler ◽  
M. W. Caffee ◽  
...  
Keyword(s):  
Noble Gas ◽  
Gas Production

scholarly journals Noble Gas Record of Japanese Chondrites

1989 ◽  
Vol 44 (10) ◽  
pp. 935-944
Author(s):  
Nobuo Takaoka ◽  
Masako Shima ◽  
Fumitaka Wakabayashi
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Ordinary Chondrites ◽  
Isotopic Signatures ◽  
Shock Heating ◽  
H Chondrites ◽  
Gas Loss ◽  
Exposure Ages ◽  
Cosmic Ray Exposure Ages ◽  
Gas Component

Abstract Concentrations and isotopic ratios of noble gases are reported for nineteen Japanese chondrites. Among those, Nio (H3-4) is a solar-gas-rich meteorite.U/Th - He ages are younger than K - Ar ages for all meteorites studied. Six of the nine L-chondrites give significantly young K-Ar ages, suggesting gas loss by impact shock heating. The remaining three L-chondrites and seven of the ten H-chondrites have K-Ar ages older than 4 Ga. The L-chondrite Nogata and the H-chondrites Numakai, Ogi and Higashi-Koen have concordant ages.Cosmic-ray exposure ages for six of the H-chondrites show clustering around the 6-Myr peak in the distribution of exposure ages, while those for the L-chondrites, ranging from 8.2 to 64 Myr, do not show clustering.Fukutomi (L4) contains trapped 36Ar in excess, 3.5 times enriched compared to the highest value so far reported for type-4 ordinary chondrites except solar-gas-rich chondrites. The 36Ar/132Xe and 84Kr/132Xe ratios fit along a mixing line between a planetary and a sub-solar (or argon-rich) component found in separates of E-chondrites [43], The Xe isotopic composition is identical with that in Abee and Kenna. The isotopic signatures suggest that this meteorite may contain mineral fragments bearing the noble gas component found in E-chondrites or ureilites. Fukutomi also contains 80Kr, 82Kr and 128Xe produced by epithermal neutron captures on 79Kr, 81Kr and 127I, respectively. From the neutron-produced Kr, the preatmospheric minimum radius is estimated to be 20 cm with an assumption of a spherical meteoroid.

scholarly journals Using Raman Spectroscopy to Improve Hyperpolarized Noble Gas Production for Clinical Lung Imaging Techniques

10.5772/65114 ◽  
2017 ◽  
Author(s):  
Jonathan Birchall ◽  
Nicholas Whiting ◽  
Jason Skinner ◽  
Michael J. Barlow ◽  
Boyd M. Goodson
Keyword(s):  
Raman Spectroscopy ◽  
Imaging Techniques ◽  
Noble Gas ◽  
Gas Production ◽  
Lung Imaging

Progress on Radiometric Dating of Wolfcamp Brines Using 4He and 40Ar

1983 ◽  
Vol 26 ◽  
Author(s):  
A. Zaikowski ◽  
B. J. Kosanke ◽  
N. Hubbard
Keyword(s):  
Ground Water ◽  
Water Samples ◽  
Noble Gas ◽  
Radioactive Decay ◽  
Gas Production ◽  
Radiometric Dating ◽  
Production Rates ◽  
Deep Wells ◽  
Hydrochemical Data ◽  
Radiometric Ages

ABSTRACTGround water samples (brines) from deep wells in the Palo Duro Basin, Texas are being analyzed for noble gases in an attempt to obtain radiometric ages for these brines. The brines contain radiogenic 4He and 40Ar produced from the radioactive decay of U, Th, and K. Consideration of hydrochemical data for the brines, various isotopic, chemical, and mineralogical data for the aquifer rocks and noble gas production rates allow estimating the age of the brines to be about 130 million years at two wells. At a third well interaquifer mixing has occurred and the age is presently indeterminate.

scholarly journals A noble gas and cosmogenic radionuclide analysis of two ordinary chondrites from Almahata Sitta

2012 ◽  
Vol 47 (6) ◽  
pp. 1075-1086 ◽  
Author(s):  
Matthias M. M. MEIER ◽  
Kees C. WELTEN ◽  
Marc W. CAFFEE ◽  
Jon M. FRIEDRICH ◽  
Peter JENNISKENS ◽  
...  
Keyword(s):  
Noble Gas ◽  
Ordinary Chondrites ◽  
Radionuclide Analysis ◽  
Cosmogenic Radionuclide

Interactions of noble gas atoms. Processes due to elastic scattering

1989 ◽  
Vol 14 (5) ◽  
pp. 467-604 ◽  
Author(s):  
A.Z. Devdariani ◽  
A.L. Zagrebin ◽  
K.B. Blagoev
Keyword(s):  
Elastic Scattering ◽  
Noble Gas
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