Clathrate formation in water-noble gas (Hydrogen) systems at high pressures

1999 ◽  
Vol 40 (5) ◽  
pp. 790-795 ◽  
Author(s):  
Yu. A. Dyadin ◽  
É. G. Larionov ◽  
E. Ya. Aladko ◽  
A. Yu. Manakov ◽  
F. V. Zhurko ◽  
...  
Keyword(s):  
High Pressures ◽  
Noble Gas ◽  
Clathrate Formation ◽  
Hydrogen Systems

Clathrate formation in binary aqueous systems with CH2Cl2, CHCl3 and CCl4 at high pressures

1990 ◽  
Vol 9 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Yu. A. Dyadin ◽  
F. V. Zhurko ◽  
T. V. Mikina ◽  
R. K. Udachin
Keyword(s):  
High Pressures ◽  
Aqueous Systems ◽  
Clathrate Formation

Clathrate formation in water-cyclic ether systems at high pressures

1991 ◽  
Vol 10 (1) ◽  
pp. 39-56 ◽  
Author(s):  
Yu. A. Dyadin ◽  
F. V. Zhurko ◽  
I. V. Bondaryuk ◽  
G. O. Zhurko
Keyword(s):  
High Pressures ◽  
Cyclic Ether ◽  
Clathrate Formation

Investigation of the Afterglow in Helium-Xenon Mixtures at High Pressures

1974 ◽  
Vol 29 (4) ◽  
pp. 577-587
Author(s):  
H. Zinko ◽  
J. Johansson
Keyword(s):  
High Pressures ◽  
Noble Gas ◽  
Recombination Coefficient ◽  
Time Interval ◽  
Pulsed Discharge ◽  
Penning Ionization ◽  
Reduced Pressure ◽  
Time Resolved ◽  
Pure Helium ◽  
Intensity Decay

The behaviour of high pressure helium afterglows has been measured by means of conductivity and light intensity decay measurements. The plasma was created in a pulsed discharge of typically 30 μsec length and then investigated by means of time resolved spectroscopy and probing pulse diagnostics under conditions which are of interest for noble gas afterglow MHD generators, i. e. a pressure range of 1-4 atm static pressure, the temperature varying from 600 - 970 °K. A marked increase in plasma lifetime was found when xenon was seeded with a rate of 10-4 to 10-3 to helium. This effect is ascribed partly to the influence of Penning ionization and partly to the fact, that slowly recombining atomic xenon ions dominate the recombination behaviour at the lower xenon seed rates during the investigated time interval of 150 μsec. The pressure dependent effective recombination coefficient is found to be (0.95 + 1.95 · 10-3 P0) 10-8 cm3 sec-1 for pure helium and (0.2 + 5.1 · 1O-4 P0) 10-8 cm3 sec-1 for a xenon seed rate of 3 · 10-4 (P0 = reduced pressure in Torr).

scholarly journals High-pressure, high-temperature molecular doping of nanodiamond

2019 ◽  
Vol 5 (5) ◽  
pp. eaau6073 ◽  
Author(s):  
M. J. Crane ◽  
A. Petrone ◽  
R. A. Beck ◽  
M. B. Lim ◽  
X. Zhou ◽  
...  
Keyword(s):  
High Pressure ◽  
Ion Implantation ◽  
High Pressures ◽  
Noble Gas ◽  
Color Centers ◽  
Vacancy Defects ◽  
High Pressure High Temperature ◽  
Pressure Medium ◽  
Optical Pressure ◽  
Pressure Metrology

The development of color centers in diamond as the basis for emerging quantum technologies has been limited by the need for ion implantation to create the appropriate defects. We present a versatile method to dope diamond without ion implantation by synthesis of a doped amorphous carbon precursor and transformation at high temperatures and high pressures. To explore this bottom-up method for color center generation, we rationally create silicon vacancy defects in nanodiamond and investigate them for optical pressure metrology. In addition, we show that this process can generate noble gas defects within diamond from the typically inactive argon pressure medium, which may explain the hysteresis effects observed in other high-pressure experiments and the presence of noble gases in some meteoritic nanodiamonds. Our results illustrate a general method to produce color centers in diamond and may enable the controlled generation of designer defects.

Oxygen/noble gas binary phase diagrams at 296 K and high pressures

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
Gunnar Weck ◽  
Agnès Dewaele ◽  
Paul Loubeyre
Keyword(s):  
Phase Diagrams ◽  
High Pressures ◽  
Noble Gas ◽  
Binary Phase ◽  
Binary Phase Diagrams

Noble Gas Partitioning Between Metal and Silicate Under High Pressures

Science ◽  
1993 ◽  
Vol 259 (5096) ◽  
pp. 788-790 ◽  
Author(s):  
J. Matsuda ◽  
M. Sudo ◽  
M. Ozima ◽  
K. Ito ◽  
O. Ohtaka ◽  
...  
Keyword(s):  
High Pressures ◽  
Noble Gas

A first-principles Hartree-Fock description of MnO at high pressures

1998 ◽  
Vol 77 (4) ◽  
pp. 1063-1075
Author(s):  
W. C. Mackrodt, E.-A. Williamson, D. W
Keyword(s):  
First Principles ◽  
High Pressures ◽  
Hartree Fock
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