?+?e? Hyperfine interactions and muonium spin exchange in low pressure gases

1981 ◽  
Vol 9 (1-4) ◽  
pp. 207-212 ◽  
Author(s):  
Donald G. Fleming ◽  
Randall J. Mikula ◽  
David M. Garner
Keyword(s):  
Spin Exchange ◽  
Hyperfine Interactions ◽  
Low Pressure ◽  
Muonium Spin

Muonium spin‐exchange in low pressure gases: Mu+O2 and Mu+NO

1980 ◽  
Vol 73 (6) ◽  
pp. 2751-2759 ◽  
Author(s):  
Donald G. Fleming ◽  
Randall J. Mikula ◽  
David M. Garner
Keyword(s):  
Spin Exchange ◽  
Low Pressure ◽  
Muonium Spin

μ+e-Hyperfine Interactions in Quartz Crystals

1980 ◽  
Vol 3 ◽  
Author(s):  
J.H. Brewer ◽  
D.G. Fleming ◽  
D.P. Spencer
Keyword(s):  
Magnetic Field ◽  
Room Temperature ◽  
Hyperfine Interactions ◽  
Single Frequency ◽  
Zero Magnetic Field ◽  
Hydrogen Atoms ◽  
Frequency Oscillation ◽  
Quartz Crystals ◽  
Muonium Spin ◽  
Motional Narrowing

ABSTRACTLongitudinal muonium spin relaxation/modulation in zero magnetic field (zf-MSR) has been used to study muonium (μ+e-) atoms in single-crystal α-quartz between 5 K and room temperature. At 6 K, three frequencies are observed, corresponding to a triaxial hyperfine matrix whose principal values are close to those observed for hydrogen atoms frozen into known sites. For intermediate temperatures the Mu atoms “hop” between sites, causing a relaxation whose rate first increases with the hop rate and then decreases due to motional narrowing. Finally, at room temperature, a single-frequency oscillation is observed, corresponding to a uniaxial motionally-averaged hyperfine interaction.

Temperature dependence of muonium spin exchange with O2 in the range 88 K to 478 K

1984 ◽  
Vol 18 (1-4) ◽  
pp. 703-708 ◽  
Author(s):  
M. Senba ◽  
D. M. Garner ◽  
D. J. Arseneau ◽  
D. G. Fleming
Keyword(s):  
Temperature Dependence ◽  
Spin Exchange ◽  
Muonium Spin

Muon charge exchange and muonium spin exchange in gases

1991 ◽  
Vol 65 (1-4) ◽  
pp. 779-791 ◽  
Author(s):  
Masayoshi Senba
Keyword(s):  
Charge Exchange ◽  
Spin Exchange ◽  
Muonium Spin

Effects of Electrical Discharges in Low Pressure Gases on the Morphology of Polyethylene Crystals

1974 ◽  
Vol 32 ◽  
pp. 544-545
Author(s):  
L.H. Bolz ◽  
D.H. Reneker
Keyword(s):  
Power Distribution ◽  
Electrical Discharge ◽  
Dielectric Breakdown ◽  
Ionic Species ◽  
Low Pressure ◽  
Polymer Surfaces ◽  
Electrical Discharges ◽  
Adhesive Bonds ◽  
Power Distribution Lines ◽  
Modification Of The Surface

The attack, on the surface of a polymer, by the atomic, molecular and ionic species that are created in a low pressure electrical discharge in a gas is interesting because: 1) significant interior morphological features may be revealed, 2) dielectric breakdown of polymeric insulation on high voltage power distribution lines involves the attack on the polymer of such species created in a corona discharge, 3) adhesive bonds formed between polymer surfaces subjected to such SDecies are much stronger than bonds between untreated surfaces, 4) the chemical modification of the surface creates a reactive surface to which a thin layer of another polymer may be bonded by glow discharge polymerization.

Field ion microscopy

1988 ◽  
Vol 46 ◽  
pp. 434-435
Author(s):  
Gert Ehrlich
Keyword(s):  
Low Temperature ◽  
Sample Surface ◽  
Low Pressure ◽  
Radius Of Curvature ◽  
Field Ion Microscopy ◽  
Phosphor Screen ◽  
Ion Microscopy ◽  
Field Ion Microscope

The field ion microscope, devised by Erwin Muller in the 1950's, was the first instrument to depict the structure of surfaces in atomic detail. An FIM image of a (111) plane of tungsten (Fig.l) is typical of what can be done by this microscope: for this small plane, every atom, at a separation of 4.48Å from its neighbors in the plane, is revealed. The image of the plane is highly enlarged, as it is projected on a phosphor screen with a radius of curvature more than a million times that of the sample. Müller achieved the resolution necessary to reveal individual atoms by imaging with ions, accommodated to the object at a low temperature. The ions are created at the sample surface by ionization of an inert image gas (usually helium), present at a low pressure (< 1 mTorr). at fields on the order of 4V/Å.

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