[en] The concepts of the Renormalised Fermi Gas Model (RGM) and the momentum anisotropy analysis have been utilised to estimate the entropy and level density of a few nuclear systems. In this approach an approximate analytic solution of the single particle level density, which is both structure and excitation dependent, has been applied to obtain numerical values. This alternate procedure does not need the customary back shift in excitation and gives results similar to other theoretical predictions and experimental results. (author). 28 refs., 8 figures, 1 table

[en] The Renormalized Gas Model (RGM) has been used to calculate single particle level density parameters for more than 2000 nucleides over the range 9<=Z<=126 (15<=A<=338). Three separate tables present the elements on or near the valley of beta stability, neutron-rich fission fragment nucleides, and transitional nuclei, actinides and light-mass super heavy elements. Each table identifies the nucleus in terms of Z and N and presents the RGM deformation energy of binding, the total RGM structural energy correction over the free gas Fermi surface, and the level density parameter

[en] Short communication. 4 refs., 2 figs., 1 tab

[en] Calculations have been done for the fission of ²³⁵U+ thermal n, ²³⁹Pu + thermal n, ²³⁷Np + fast n, ²³¹Pa + fast n and ²⁵²Cf spontaneous fission. Fragment excitation and neutron spectra are studied using the Renormalized Gas Model (RGM). Results are in good agreement with those of others. (A.K.)

[en] A comparative study utilising modified RGM formulation, of the fission energy partitions in the thermal neutron induced fission of ²⁴⁵Cm, ²³⁹Pu and ²⁴⁹Cf and the spontaneous fission of ²⁴⁶Cm, ²⁴⁰Pu and ²⁵⁰Cf has been made and compared with some recent experimental results. After solving the modified RGM-PES energy balance equation for the spontaneous fission case, a semi empirical formula for the partitioning of the additional excitation energy between the conjugate fragments is tried. Assumed excitation dependence of the RGM corrections and hence of the stiffness parameters and the scission point deformations of the nascent fragments introduces relative changes of the parameters over the spontaneous case. The calculated results for ²⁴⁵Cm(n,f) and ²⁴⁶Cm(s,f) and ²³⁹Pu(n,f) and ²⁴⁰Pu(s,f) showed good agreement with the recent experimental results. In all the cases studied the average total kinetic energy increase in the (n,f) cases is about 20% of the total additional excitation energy of the compound nucleus. (auth.)

[en] A previously developed structure-sensitive statistical model, incorporating the nuclear structure and deformation effects, has been utilised to study the prompt mass distributions in fission and other related characteristics. The particle of detailed balance has been applied to calculate the yield probabilities. The fusion barriers and the penetrabilities of the fragments were estimated from a nuclear plus Coulomb interaction potential. The prompt fragment mass yields were then obtained as a product of three quantities: the product level densities of the conjugates at their most probable excitation energies, the barrier penetrabilities and the isobaric charge yields. The calculations are free from any arbitrary parameters. Comparison with experimental data for ²²⁶Ra(p,f) at Esub(p) = 11.1 MeV, ²³²Th(n,f) at Esub(n) = 1.0 MeV, ²³⁵U(n,f) and ²³⁹Pu(n,F) at thermal neutron energies and for the spontaneous fission of ²⁵²Cf shows fairly good agreement. (orig.)

[en] The relative stability of superheavy elements against beta-decay and spontaneous fission has been investigated. A simple criterion of beta-stability using the Fermi gas model has been developed, tested in the range of stable nuclei and extended to the superheavy region. Spontaneous fission half-lives have been calculated using the statistical model in the expected region of relative beta-stability for superheavy nuclei. Our results have been compared with previous calculations. (orig.)

[en] Calculation shows that the spatial extension of ⁶Li is similar to that of ⁷Be. The effect of the structures of these nuclei on sub-barrier fusion is under way

[en] The paper describes the operation of a simple one-dimensional LPWC from a completely different standpoint. The position output is derived from a separate position plane, where discrete resistances are soldered between two adjacent wires. Theoretical formulations for the position extraction are derived where the role of various detector parameters are dealt with. Position spectrum is shown for various choices of resistances varying from 50 Ω to 220 kΩ. Best position resolution and linearity is obtained for 33 kΩ though it violates the existing hypothesis

[en] The light nuclei with two cluster configuration exhibit appreciable probability of breakup in a collision process because of small separation energy of the configuration. The presence of breakup subsequently influences the outcome of the collision of these weakly bound projectiles in a way not observed in case of their strongly bound counter parts. In this context here a systematic continuum discretized coupled channel (CDCC) calculation for our measured elastic angular distribution for the system ⁶Li +²⁸Si has been presented. The primary motivation is to investigate the effect of continuum coupling on the energy variation of the effective interaction potential around the Coulomb barrier energy