Quantum effects of variable-mass fermion fields in the Friedmann model

S. A. Pritomanov

doi:10.1007/bf00896271

Quantum effects of variable-mass fermion fields in the Friedmann model

Soviet Physics Journal ◽

10.1007/bf00896271 ◽

1990 ◽

Vol 33 (1) ◽

pp. 78-82

Author(s):

S. A. Pritomanov

Keyword(s):

Variable Mass ◽

Quantum Effects ◽

Friedmann Model ◽

Fermion Fields

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Quantum effects of scalar and vector particles with variable mass in homogeneous and isotropic cosmological models

Soviet Physics Journal ◽

10.1007/bf01882973 ◽

1983 ◽

Vol 26 (4) ◽

pp. 348-351

Author(s):

A. V. Nesteruk

Keyword(s):

Variable Mass ◽

Quantum Effects ◽

Cosmological Models ◽

Vector Particles

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Mass Determination by Direct Measurement of Electron Scattering

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100114827 ◽

1975 ◽

Vol 33 ◽

pp. 240-241

Author(s):

M. K. Lamvik ◽

A. V. Crewe

Keyword(s):

Cross Section ◽

Electron Scattering ◽

Mass Density ◽

Variable Mass ◽

Scattering Cross Section ◽

Mass Determination ◽

Number Density ◽

Cross Sectional ◽

Thin Slice ◽

Scattering Cross

If a molecule or atom of material has molecular weight A, the number density of such units is given by n=Nρ/A, where N is Avogadro's number and ρ is the mass density of the material. The amount of scattering from each unit can be written by assigning an imaginary cross-sectional area σ to each unit. If the current I0 is incident on a thin slice of material of thickness z and the current I remains unscattered, then the scattering cross-section σ is defined by I=IOnσz. For a specimen that is not thin, the definition must be applied to each imaginary thin slice and the result I/I0 =exp(-nσz) is obtained by integrating over the whole thickness. It is useful to separate the variable mass-thickness w=ρz from the other factors to yield I/I0 =exp(-sw), where s=Nσ/A is the scattering cross-section per unit mass.

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