Rate of Magma Supply Beneath Mammoth Mountain, California, Based on Helium Isotopes and CO 2 Emissions

2019 ◽  
Vol 46 (9) ◽  
pp. 4636-4644 ◽  
Author(s):  
Jennifer L. Lewicki ◽  
William C. Evans ◽  
Emily K. Montgomery‐Brown ◽  
Margaret T. Mangan ◽  
John C. King ◽  
...  
Keyword(s):  
Helium Isotopes ◽  
Mammoth Mountain ◽  
Magma Supply

scholarly journals Path-integral calculation of the fourth virial coefficient of helium isotopes

2021 ◽  
Vol 154 (10) ◽  
pp. 104107
Author(s):  
Giovanni Garberoglio ◽  
Allan H. Harvey
Keyword(s):  
Path Integral ◽  
Virial Coefficient ◽  
Helium Isotopes

scholarly journals Helium Isotopes Quantum Sieving through Graphtriyne Membranes

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 73
Author(s):  
Marta I. Hernández ◽  
Massimiliano Bartolomei ◽  
José Campos-Martínez
Keyword(s):  
Low Temperatures ◽  
Quantum Tunneling ◽  
Transition State Theory ◽  
Selective Adsorption ◽  
State Theory ◽  
Helium Isotopes ◽  
Quantum Calculations ◽  
Approximate Methods ◽  
Helium Atoms ◽  
Quantum Behavior

We report accurate quantum calculations of the sieving of Helium atoms by two-dimensional (2D) graphtriyne layers with a new interaction potential. Thermal rate constants and permeances in an ample temperature range are computed and compared for both Helium isotopes. With a pore larger than graphdiyne, the most common member of the γ-graphyne family, it could be expected that the appearance of quantum effects were more limited. We find, however, a strong quantum behavior that can be attributed to the presence of selective adsorption resonances, with a pronounced effect in the low temperature regime. This effect leads to the appearance of some selectivity at very low temperatures and the possibility for the heavier isotope to cross the membrane more efficiently than the lighter, contrarily to what happened with graphdiyne membranes, where the sieving at low energy is predominantly ruled by quantum tunneling. The use of more approximate methods could be not advisable in these situations and prototypical transition state theory treatments might lead to large errors.

Electromagnetic structure of the helium isotopes

1977 ◽  
Vol 15 (4) ◽  
pp. 1396-1414 ◽  
Author(s):  
J. S. McCarthy ◽  
I. Sick ◽  
R. R. Whitney
Keyword(s):  
Helium Isotopes ◽  
Electromagnetic Structure

Relationship between geological structure and helium isotopes in deep ground-water from the Osaka Basin: Application to deep groundwater hydrology

2008 ◽  
Vol 42 (1) ◽  
pp. 61-74 ◽  
Author(s):  
NORITOSHI MORIKAWA ◽  
KOHEI KAZAHAYA ◽  
HARUE MASUDA ◽  
MICHIKO OHWADA ◽  
ATSUKO NAKAMA ◽  
...  
Keyword(s):  
Ground Water ◽  
Geological Structure ◽  
Helium Isotopes ◽  
Groundwater Hydrology ◽  
Deep Groundwater ◽  
Osaka Basin
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