No abstract

The objective of this work is to compare natural radiation exposure to the public in the uranium regions of Poli and Lolodorf and the oil region of Bakassi in Cameroon. From some reported studies on natural radiation exposure in Cameroon, the radiation risk was determined. Activity concentrations, external radiation, and the ingestion and inhalation dose of each of the above regions were compared with the world average value given by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). From the total dose, the radiation risk of each region was calculated and compared with the world average value. The specific case of indoor radon exposure was particularly considered. The radiation risk attributed to the indoor radon exposure was compared with the lung cancer rate in Cameroon as given by the International Agency for Research on Cancer (IARC). In conclusion, the local risks are elevated but not necessarily representative of the country as a whole.

The Bohr Hamiltonian with four inverse power terms potential for the [Formula: see text]-part and a harmonic oscillator for the [Formula: see text]-part is solved. The [Formula: see text]-part has been solved using the biconfluent Heun equation. The total wave function and energy have been derived. The numerical results for energy triaxial nuclei spectra are compared with the experimental data, esM and esKM models known for [Formula: see text] atomic nuclei. These results are in overall good agreement with the experimental data. After this, the corresponding [Formula: see text] transition rates have been calculated for each nuclei of Platinum.

In this paper, we determine eigen energies, eigenfunctions and statistical properties of non-relativistic heavy quarkonia interacting with the extended Cornel potential within a space-time generated by a cosmic-string. We extend the Cornel potential by adding the inverse square potential plus the quadratic potential. We have calculated the energy eigenvalues and the corresponding eigenstates using the Extended Nikiforov-Uvarov (ENU) method. Then, based on the equation of energy spectra, the thermodynamic properties like partition function, entropy, free energy, mean energy and specific heat capacity are calculated within the space-time of a cosmic-string. In the next step, we investigate the influence of the cosmic-string parameter on quantum states of heavy quarkonia and their statistical properties.