We use the 1/N expansion formalism in a systematic study of high-spin states in the sd and sdg boson models with emphasis on spin dependence of moment of inertia and E2 transitions. The results are applied to the high-spin states in the actinide nuclei 232Th, 234−238U, where the need for g bosons is especially acute but until now, no realistic calculation existed. We find that the d-boson energ...

The location, nature, and size distribution of uranium-rich grains in sediment layers can be identified by sunbursts of etched particle tracks if each sample is pressed against a track detector, next irradiated with thermal neutrons, and the detectors then chemically etched to reveal fission tracks. The total track abundance from the sample is a measure of the 235U content; hence, if the bulk u...

Abstract. Isomeric states in neutron-deficient nuclei around A≈190 have been identified following the projectile fragmentation of a relativistic energy 238U beam. The deduced isomeric ratios are compared with a model based on the abrasion-ablation description. The experimental isomeric ratios are lower by a factor of ≈2 than the calculated ones assuming the ‘sharp cutoff’ approximation. The obs...

Test measurements with 241Am-α-particles, 12C, 20Ne, 58Ni, 208Pb and 238U projectiles are performed. It is shown that the most important charactristics of heavy-ion diamond detectors are described by the shaping parameters of the detectors single pulse. Distributions of rise and decay times of the signals as well as of the associated charge amplitudes are discussed. An intrinsic time resolution...

Introduction: Investigation on the natural radionuclides 238U, 232Th, 40K and natural fallout radionuclide 210Po in the prominent plants species of Western Ghats tropical forest near Kotagiri have been carried out as a part of baseline background radiation studies in the forest environment. Materials and Methods: The prominent plants species of the region Evodia roxburghiana and Eleaocarpus obl...

This research aimed to assess the levels of natural radionuclides in soil Riruwai mining area and evaluate radiological hazards associated with them. A total sixty samples were collected from four sampling sites during dry wet seasons. The concentrations uranium-238 (238U), thorium-232 (232Th), potassium-40 (40K) measured using an HPGe gamma-ray spectrometer, used estimate internal external gam...

The diffusion of defects (e.g., vacancies and interstitials) elements used for dating He Pb) in a mineral structure is thermal process: This the primary assumption to determine age history minerals. For instance, reconstruction, through number length distribution tracks produced by spontaneous fission 238U, obtained assuming event be only energy source shortening tracks. Here, we report new, no...