High-Energy Ejection of Molecules and Gas-Dust Outbursts in Coal Mines

In the current work, using the framework of the formalism found in the Bogolyubov–Born–Green–Kirkwood–Yvon (BBGKY) equations for the distribution functions of particle groups, the effective single-particle potential near the surface of the liquid was analyzed. The thermodynamic conditions under which a sudden opening of the liquid surface leads to high-energy ejection of atoms and molecules were found. The energies of the emitted particles were observed to be able to significantly exceed their thermal energy. Criteria of the ejection stability of the liquid surface and the self-acceleration of ejection were formulated. The developed theory was used to explain the phenomenon of the self-acceleration of gas-dust outbursts in coal mines during the explosive opening of methane traps. The results also explained the mechanisms of generating significant amounts of methane and the formation of coal nanoparticles in gas-dust outbursts. The developed approach was also used to explain the phenomenon of the self-ignition of hydrogen when it enters the atmosphere.

Download Full-text

NOTE ON THE SINGLE-PARTICLE ENERGY AND THE BINDING ENERGY OF MANY-BODY, SATURATED SYSTEMS

Canadian Journal of Physics ◽

10.1139/p58-130 ◽

1958 ◽

Vol 36 (10) ◽

pp. 1261-1264

Author(s):

George A. Baker Jr.

Keyword(s):

Binding Energy ◽

Single Particle ◽

Particle Energy ◽

The Self ◽

Exclusion Principle ◽

Single Particle Energy ◽

Many Body ◽

Self Consistent ◽

Particle Potential ◽

Single Particle Potential

Brueckner has recently pointed out that, for saturation, (Eav−E(pF)) does not vanish in general because of "important many-body contributions to the single particle energy which arise from the effects of the exclusion principle and from the variation of the self-consistent excitation spectrum with density." It is the purpose of this note to evaluate this difference in terms of the properties of the single-particle potential.

Download Full-text

The Deformation Structure of the Nuclei 32S and 36Ar

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v13i2.6028 ◽

2017 ◽

Vol 13 (2) ◽

pp. 4678-4688

Author(s):

K. A. Kharroube

Keyword(s):

Single Particle ◽

Electric Quadrupole ◽

Quadrupole Moments ◽

Moments Of Inertia ◽

Deformation Structures ◽

Particle Potential ◽

Nilsson Model ◽

Single Particle Potential ◽

Axes Of Symmetry ◽

Good Agreement

We applied two different approaches to investigate the deformation structures of the two nuclei S32 and Ar36 . In the first approach, we considered these nuclei as being deformed and have axes of symmetry. Accordingly, we calculated their moments of inertia by using the concept of the single-particle SchrÃ¶dinger fluid as functions of the deformation parameter Î². In this case we calculated also the electric quadrupole moments of the two nuclei by applying Nilsson model as functions of Î². In the second approach, we used a strongly deformed nonaxial single-particle potential, depending on Î² and the nonaxiality parameter Î³ , to obtain the single-particle energies and wave functions. Accordingly, we calculated the quadrupole moments of S32 and Ar36 by filling the single-particle states corresponding to the ground- and the first excited states of these nuclei. The moments of inertia of S32 and Ar36 are then calculated by applying the nuclear superfluidity model. The obtained results are in good agreement with the corresponding experimental data.

Download Full-text