[en] The results of an investigation of kaonic atoms are reported under the headings; antiK N interaction, first order optical potential, microscopic optical potentials, second order optical potential, effects of optical potential on nuclear electromagnetic interaction, results and discussion. (U.K.)

[en] It is shown that the general features of the heavy ion elastic scattering data are reproduced by using a smooth cut-off model for the scattering matrix in which the real nuclear phase shift and the reflection coefficient are used as analytic functions and have a few adjustable parameters. A computer program is described for carrying out the calculations to fit the experimental ratio of elastic differential cross-sections to Rutherford cross-sections. The scattering of 10.375 MeV/u¹²C ions from Fe, Ag and Ta are considered as test cases. The absorption radii and reaction cross-section predicted by the theory are also calculated. (author)

[en] The technique of Solid State Nuclear Track Detection (SSNTD) has matured since long as a viable method of charged particle detection. The usage of this method has been successfully extended to neutron detection and gamma dose measurements as well. The etch-track mechanism has been further exploited to generate a major application area of nuclear track filters. In spite of the remarkable diversity of SSNTD applications that have emerged over the years in different fields, its potential is by no means saturated. In this article, a brief review of SSNTD applications is presented with reference to contemporary interests in science and technology. For convenience, the coverage of topics is organized under broad categories of Nuclear Physics, Materials Research, Geology, Environmental Science and allied technologies. While identifying high interest areas, those with limited but innovative applications are also mentioned. In some cases, the important results are quoted for the purpose of illustrating the strength of track detection method. In general, the presentation is aimed at providing a broad perspective of current SSNTD uses instead of detailed description of individual applications. The coverage is selective rather than exhaustive and portrays authors' preferences. Some comments related to the adoption of this technique as a mainstream method of detection are also given

[en] Kinematical correlations of nuclear fragments in a binary nuclear reaction can be studied with the help of suitable experimental data. When dielectric track detectors are used to register the reaction events, the primary experimental data consists of track parameters. Typically there are thousands of binary events each of which is characterized by five experimental data value. The sifting and analysis of data is usually very tedious and time consuming if it is done manually. It has been felt for some time that the separation of elastic and different inelastic channels may be automated by using appropriate computer codes. For this purpose a package of programs, described in this report have been developed at PINSTECH. This package is being used to convert primary data into lengths and angular bins, assign uncertainties to these values, evaluate theoretically expected values for elastic events, and finally compare theoretical and experimental values to select elastic events. Using these selected events, the ratio of differential elastic cross section and rutherford cross section is calculated, as a function of scattering angle. This quantity is of interest for the determination of total reaction cross section as well as nuclear size parameters. (author)

[en] The KMT method is used to evaluate the equivalent local optical potential for ¹²C up to second order. The scattering amplitudes used are those obtained by Martin using analyticity constraints. The results using Fermi gas correlations and the closure approximation are substantially different from those obtained using correlations corresponding to shell model wave functions, both with and without closure. (auth)

[en] A series of chemical etching experiments have been carried out on CR-39 detectors irradiated with fission fragments of ²⁵²Cf to study the bulk and track etching characteristics. Experimental data has been analyzed to find out important track etch parameters. Both bulk and track etch rates are found to follow the Arrhenius equation which gives the variation of etch rate with temperature for a specific set of etching conditions. Activation energies for bulk and track etching have been determined by fitting Arrhenius equation to the experimental data. Other track etch parameters, e.g. critical angle of etching and track registration efficiency have also been determined using experimental data. Track etch parameters depend on properties of incident ion and etching conditions. Results describing the dependence of track etch parameters on etching conditions have been presented. These results are useful in the interpretation of track data

[en] The electric dipole transition rates in kanonic atoms are calculated by using distorted relativistic wave functions. The kaon-nucleus strong interaction which is responsible for the distortion of atomic states is considered to be proportional to the nuclear density and the effective isospin-averaged kaon-nucleon scattering length. Six atoms have been studied for which the last observed X-rays correspond to 3d-2p, 4f-3d, 5g-4f, 6h-5g, 7i-6h and 8j-7i transitions. It is found that the electric dipole transition rate is enhanced by an amount (0.3-7.6)x10¹³ s^-1. (orig.)

[en] By employing new fits to the p and α form factors, an excellent description of dip-bump structure in pα data is obtained in the context of the Chou-Yang model. Previous Chou-Yang calculations on this process did not agree with the data beyond the dip region

[en] It is shown that the Glauber-Velasco version of the Chou-Yang model gives a correct description of the high-energy πp elastic dσ/dt provided the anisotropy factor is taken as (a² + t)/(a² - t). Regardless of the π and p form-factor combination used, this factor, first introduced by Bourrely et al. in pp scattering, leads to two dips in πp cross sections at 200 GeV/c. A new fit to the proton electric form factor, based on the recent SLAC data, is found to give the best agreement between model calculations and experimental dσ/dt values

[en] The exclusive measurements of reactions induced by 1050 MeV Kr ions incident on natural uranium have been made with the help of mica track detectors used in 2 pie-configuration. The cross-sections for ternary and quarternary events have been determined by directly complete kinematical picture of the reaction process has been deduced by converting the three dimensional track parameters (lengths and angles) into parameters of reaction products (masses and energies) on an event basis. An empirical velocity-range relation has been used for this purpose, which has been obtained by an internal calibration procedure. It has been found that the reaction mechanism for the bulk of the data can be described as a sequential fission process. Final mass distributions and total kinetic energy losses have been obtained for all channels. In order to estimate the uncertainties of computed quantities in relation to the measurement errors, Monte-Carlo simulation of the selected data sets has also been performed. (orig./A.B.)