Physics |
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1998, No. 4
V.A. Zhukova, V.V. Ivahnik, V.I. Nikonov
Simulating photochromatic particles by continuous balls, the size of which changes under the normal law, the dependence is analysed of the dynamic hologram diffraction efficiency upon the photochromatic medium thickness. Investigated is the change of the photochromatic medium optimal thickness and of the corresponding hologram difraction efficiency due to the parameters recording and erasing radiations and du eto the average size and dispersion in the photochromatic particles distribution.
A.P. Martynenko, V.A. Saleev
VACUUM POLARIZATION CONTRIBUTION TO THE PIONIUM DECAY RATE
The contribution of vacuum polarization and hadronic vacuum polarization to the decay rate of the bound state (β+β-) is evaluated on the basis of the quasipotential method. Taking into accout these effects of the vacuum polarization we have obtained the next modication of Deser-type formula:
