Volume 35, Issue 5
November 1990, pages 1-501
pp 1- November 1990 Comments
pp 421-428 November 1990
We present an alternative non-quantum mechanical description of Aharonov-Bohm effect.
pp 429-437 November 1990
Results on charged multiplicity distributions in high energy proton-neutron interactions derived frompd data at 400 GeV are presented. These are compared with other available data onpn distributions at and above 100 GeV. The study reveals that the proton-neutron distribution at 400 GeV do not obey KNO scaling. It has been shown that the negative binomial distribution gives a fair description of the multiplicity distribution and that the early onset of KNO scaling below 400 GeV is approximate.
pp 439-447 November 1990
The fusion cross section for the system6Li+28Si has been measured atE∼36 MeV. Combining this with the data available at lower energies, the nucleus-nucleus real potentials have been determined for a range of interaction distances.
pp 449-459 November 1990
A relatively simple procedure using nuclear interaction calculated microscopically from two-nucleon potential employing equivalence of resonating group method and generator coordinate method has been used to calculate the differential cross-sections (DCS) forα +20Ne elastic scattering atElab=18.0, 20.2, 21.9, 23.0 and 27.2 MeV. The absorption effects due to the opening of the non-elastic channels are taken into account approximately by the sharp cut-off of lower partial waves. The anomalous large oscillations of the DCS at backward angles atElab=18.0 and 27.2 MeV are reproduced. The calculated results are in fair agreement with the experimental data.
pp 461-471 November 1990
We investigate the dynamics of the number of particles diffusing in a multiplicative medium. We show that the typical behaviour of the growth process is different from the average. We develop a new formalism to study the average growth process and extend it to the calculation of higher moments and finally of the probability distribution. We show that the fluctuations of the growth process increase exponentially with time. We describe the interesting features of the distribution.
pp 473-483 November 1990
The Barker-Henderson perturbation theory is used for a ν-dimensional fluid with square-well potential. Analytic expressions are given for the equation of state, excess free energy per particle and internal energy. The numerical results are discussed. A significant feature is the increase of the thermodynamic properties with increasing dimensionality.
pp 485-493 November 1990
M-shell ionization cross sections for atoms due to the impact of proton and α-particles have been calculated in the binary encounter approximation. The effects of Coulomb deflection of the incident projectile and increase in binding of the target electron have been investigated. Roothan-Hartree-Fock velocity distribution for the target electrons has been used in the present work. The calculated cross-sections have been compared with experimental results and other theoretical calculations wherever available. The present calculations give a good account of experimental observations.
pp 495-501 November 1990
Using an hydrodynamical model, analytical investigation of the stimulated Brillouin scattering of an electromagnetic wave by an acoustic-like mode has been done in a multi-ion species plasma. The acoustic-like mode is a new mode which propagates in a multi-ion plasma only. The non-linear dispersion relation and the growth rate of the excited modes are derived. The non-linearity arises through the motion of ions which is introduced through ponderomotive force. It is found that the growth rate can be controlled by several parameters like charge number, mass, density and temperature of the ions.
Volume 93 | Issue 5
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