scholarly journals The atmospheric helium isotope ratio: Is it changing?

2004 ◽  
Vol 31 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
John Lupton ◽  
Leigh Evans
Keyword(s):  
Isotope Ratio ◽  
Helium Isotope

scholarly journals Changes in the atmospheric helium isotope ratio over the past 40 years

2013 ◽  
Vol 40 (23) ◽  
pp. 6271-6275 ◽  
Author(s):  
J. Lupton ◽  
L. Evans
Keyword(s):  
Isotope Ratio ◽  
Helium Isotope ◽  
The Past

scholarly journals Atmospheric helium isotope ratio.

1988 ◽  
Vol 22 (4) ◽  
pp. 177-181 ◽  
Author(s):  
Yuji Sano ◽  
Hiroshi Wakita ◽  
Xu Sheng
Keyword(s):  
Isotope Ratio ◽  
Helium Isotope

Helium isotope ratio measurement by a single focusing mass spectrometer with large incident and exit angles

1989 ◽  
Vol 91 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Yuji Sano ◽  
Hiroshi Wakita ◽  
Kikuo Wakino ◽  
Michihiro Murata ◽  
Hiroshi Yamamoto ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Isotope Ratio ◽  
Helium Isotope ◽  
Isotope Ratio Measurement ◽  
Ratio Measurement

A ten-year decrease in the atmospheric helium isotope ratio possibly caused by human activity

1989 ◽  
Vol 16 (12) ◽  
pp. 1371-1374 ◽  
Author(s):  
Yuji Sano ◽  
Hiroshi Wakita ◽  
Yoshihiro Makide ◽  
Takeshi Tominaga
Keyword(s):  
Human Activity ◽  
Isotope Ratio ◽  
Helium Isotope
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