R e g u l a r p a p e r s

Moscow University Physics Bulletin 1971. **26**. N 2. P. 1

The bremsstrahlung which accompanies the neutrino annihilation of polarized leptons is analyzed on the basis of the theory of a universal weak interaction. The photons produced during this process can in principle yield information about the vertex of the four - fermion interaction. Their angular and energy distributions and the high - energy behavior of the cross section depend strongly on the polar -ization states of the initial particles.

Show AbstractMoscow University Physics Bulletin 1971. N 2.

A method is proposed for measuring the potential distribution along the axis in a Penning discharge in a high vacuum (р<10^(-4)torr). The potential distribution has been measured for various values of Vа, H, р and various anode lengths.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 14

A study was made of the anisotropy α of the even transverse field E(s) which arises in Bi in strong effective magnetic fields, in the plane perpendicular to the direction of current I. The measurements were carried out over the temperature range from 77°K to 1.8°K in fields up to 15 kOe.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 20

Recent work by Dicke has shown that the sun is not a perfect spheroid, but has an oblateness of a factor of 5*10^(-5). One consequence of this oblateness is a change in the gravitational potential of the sun, which should affect the motion of the planets. In contrast with Dicke's study, based on scalar gravitational theory, the Einstein relativistic gravitational theory is used to study the effect of the oblateness of the sun on the motion of a single planet in the ecliptic plane under the assumption that the sun is an oblate ellipsoid of revolution and (for simplicity) under the assumption that the sun is homogeneous.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 24

Measurement of the approach angles of radial waves by differential - phase systems is based on the use of a phase gradient along the propagation direction or, more precisely, a difference between the phases of the fields at two (or several) spatial points. In this connection it is interesting to treat the problem of finding the distribution function and statistical characteristics of an arbitrary phase of the field upon reflection from an inhomogeneous plasma layer (such as the i onosphere).

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 29

The conditions for ultrasound generation in a CdS crystal have been studied. The vibration equation in the piezoelectric semiconductor with specified boundary conditions is solved by the Bubnov - Galerkin method. Expressions are found for the critical electron drift velocity Vocr and the ultrasonic frequency ω_cr corresponding to the beginning of generation. The results are compared with previous results.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 34

Equations are found for the root trajectories and for the parameter for systems having distributed delay, whose characteristice quation (where к is the free parameter). The general properties of the root trajectories are analyzed, and an example is discussed.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 40

Two theoretical problems involving heavily built semiconductors are analyzed.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 46

It is shown that in a strong magnetic field, in which the density of the negative; space charge in a cylindrical gas magnetron reaches its maximum value, the equation for the discharge current is a particular case of the equation for the discharge current in a Penning discharge, reported previously by Reikhrudel et al. The value of (Hra)n , at which we find р=р_max for a given Va, is determined. The theoretical values are found to be in satisfactory agreement with the experimental values for various geometric and physical parameters.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 52

Linear two - dimensional systems having nonidentical channels and crossed linkages are analyzed by the root - trajectory method. Some examples of nonidentical systems are discussed.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 56

An experimental study has been made of light - induced stiffness and radiometric oscillatory instability.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 60

The classical Dirac equation for a point electron is used to analyze the Born paradox, according to which the radiative - friction power seems to not be equal to the energy radiated per unit time in certain cases.

Show AbstractMoscow University Physics Bulletin 1971. **26**. N 2. P. 67

The natural magnetic states of rock have been studied and compared with a zero initial state. Rocks are usually in nonequilibrium states. The deviation from equilibrium depends on the temperature at which the natural remnant magnetization was formed and on the time which has elapsed since the rock formation.

Show AbstractB r i e f r e p o r t s

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