Articles written in Pramana – Journal of Physics
Volume 7 Issue 1 July 1976 pp 6-16 Nuclear And Particle Physics
Thermonuclear reaction rates for the temperature range 1≤
Volume 9 Issue 4 October 1977 pp 419-434 Nuclear And Particle Physics
The total (
Volume 10 Issue 3 March 1978 pp 329-339 Nuclear Physics
The total (
Volume 19 Issue 6 December 1982 pp 565-577 Nuclear And Particle Physics
The total (
Volume 23 Issue 4 October 1984 pp 495-500 Nuclear Physics
Angular distribution for the elastic scattering of 36 MeV alpha particles from gold target has been measured from
Volume 24 Issue 4 April 1985 pp 629-635 Nuclear Physics
The total cross-section for the reaction51V(
Volume 27 Issue 1-2 July 1986 pp 139-160 Nuclear Physics
Ever since it was proposed more than three decades ago, the nuclear optical model has been very successful in interpreting a large body of nucleon-induced nuclear reaction data in terms of a complex nucleon-nucleus potential. Rapid progress both in the experimental measurements and the theoretical developments in the last two decades has led to a better understanding of this nucleon-nucleus optical potential. From the parameter-fitting phenomenological stage, the optical model has come a long way and it is now possible to calculate the nucleon-nucleus optical potential in a reasonable way starting from the fundamental nucleon-nucleon interaction. Excellent reviews on various aspects of the optical model exist in the literature for proton energies above 10 MeV. The present article is an attempt to review comprehensively the status of the proton-nucleus optical potential at low proton energies, below the Coulomb-barrier, for target nuclei with mass numbers lying between 40 and 130. The sets of phenomenological optical potential derived mostly from (
Volume 27 Issue 6 December 1986 pp 747-760 Particle Physics
Differential cross-section angular distributions for the elastic scattering of 270 MeV3He particles from58Ni,90Zr,116Sn and208Pb have been measured. Optical model analysis of the cross-sections has yielded the optical model parameters for3He particles at 270 MeV. Angular distributions have also been measured for the inelastic excitation of the low-lying levels in the above mentioned nuclei. A collective model analysis using the distorted wave Born approximation (DWBA) of these cross-sections with the distorted waves generated by the optical model parameters determined from the elastic scattering analysis, has yielded the reduced transition probability (B(EL)) values consistent with those reported in the literature.
Volume 33 Issue 3 September 1989 pp 365-379 Nuclear Physics
The giant resonance region in90Zr and116Sn excited by 270 MeV helions has been measured up to about 35 MeV excitation energy. The low and the high energy octupole resonances are seen prominently in addition to the quadrupole and the monopole resonances. The angular distribution data for the various multipoles are satisfactorily explained by the collective model calculations. The percentatge energy weighted sum rule strengths have been determined for all the prominent resonances.
Volume 35 Issue 5 November 1990 pp 439-447
The fusion cross section for the system6Li+28Si has been measured at
Volume 41 Issue 2 August 1993 pp 163-169 Research Articles
Various models have been proposed in order to understand the near barrier heavy-ion fusion data. Amongst others the coupled channel approach of Dasso and Landowne and the neutron flow picture of Stelson are two of the mechanisms which describe well a large body of near barrier fusion data. From an analysis of16O induced fusion reaction around the barrier for various targets an attempt has been made to identify which out of the above two mechanisms is more appropriate to explain these data.
Volume 41 Issue 4 October 1993 pp 339-344
The measurements of fission fragment angular distributions for the system19F+232Th have been extended to the sub-barrier energies of 89.3, 91.5 and 93.6 MeV. The measured anisotropies, within errors are nearly the same over this energy region. However, the deviation of the experimental values of anisotropies from that of standard statistical model predictions increases as the bombarding energy is lowered.
Volume 53 Issue 3 September 1999 pp 485-494 Nuclear Reactions At Near And Sub-Barrier Energies
Systematic studies of heavy-ion induced fission reactions at near-barrier energies carried out in the last decade have brought out many interesting aspects of fission process in general. The recent experimental findings which show dependence of fission fragment angular distributions on entrance channel, shape, size and spin of the interacting nuclei and shell closure of the intermediate compound nucleus are summarised in the present paper.
Volume 53 Issue 3 September 1999 pp 549-552 Nuclear Reactions At Near And Sub-Barrier Energies
In this paper, we report our measurements of back-angle oxygen and carbon particle yields from 16O+89Y, 12C+93Nb reactions forming the same compound nucleus 105Ag at the same excitation energy and spin distribution. We find anomalously large oxygen yield and entrance channel dependence at high excitation energies from 16O+89Y reaction implying formation of a dinuclear orbiting complex. Possible connection between nuclear orbiting and fast fission is also discussed.
Volume 57 Issue 1 July 2001 pp 75-84 Invited Papers, Nuclear Reactiory
Light charged particles emitted in heavy-ion induced reactions, their spectra and angular distributions measured over a range of energies, carry the signature of the underlying reaction mechanisms. Analysis of data of light charged particles, both inclusive and exclusive measured in coincidence with gamma rays, fission products, evaporation residues have yielded interesting results which bring out the influence of nuclear structure, nuclear mean field and dynamics on the emission of these particles.
Volume 57 Issue 1 July 2001 pp 209-213 Contributed Papers, Nuclear Reactions
Inclusive cross sections of α particles and tritons from the breakup of 42 MeV 7Li by 12C and 197Au targets are presented and analysed in the framework of the Serber model. Spectral distortions due to the targets and relevant reaction mechanisms are discussed.
Volume 59 Issue 5 November 2002 pp 739-744
The folded tandem ion accelerator (FOTIA) facility set up at BARC has become operational. At present, it is used for elemental analysis studies using the Rutherford backscattering technique. The beams of1H, 7Li, 12C, 16O and 19F have been accelerated up to terminal voltages of about 3 MV and are available for experiments. The terminal voltage is stable within ±2 kV. In this paper, present status of the FOTIA and future plans are discussed.
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