[en] Two of the structural functions, static pair correlation function of electrons around positively charged particles and static structure factor, have been theoretically calculated for a one dimensional quantum system with two mobile components occupying same charge density at equal temperatures. The structural functions have been investigated for their density and mass dependence. The reported values of static pair correlation function and structure factors are found to be dependent upon linear density and mass of positive components. Static pair correlation functions for a wide range of temperature, 100K≤T≤ 1500K, has also been generated theoretically. A variation, though diminutive, with temperature has been observed. (author)

[en] The bosonic string potential model proposed by Nambu and Goto contains Coulombic Lüscher term, which is a function of the space-time dimension ‘d’. In this work, some novel features of QCD-String mapping, if the colour-cum-flavour dependent coefficient of the QCD coulomb potential and the Luscher coefficient in d space-time dimension are conjectured to be equivalent have been reported

[en] The diffusion quantum Monte Carlo method has been applied to investigate the effect of a strong magnetic field on the few-electron atoms. Gaussian type orbital basis sets are used in the computations developed by using Post-HartreeFock methods. The ground state energy Eigenvalues of the helium, lithium, beryllium, and boron atoms have been calculated. The advantages of adding the electrons correlations to the wave function in the technique of diffusion Monte Carlo method enabled to solve the Schrödinger equation for these atoms in the external magnetic field for different strengths. The method showed good agreements with the previous results

[en] The Co-Ni ferrites with general formula Co_1-xNi_x Fe₂O₄ (where x=0.0, 0.05, 0.10) were prepared by solid state root method. The X-ray diffraction and X-ray, K- absorption near edge measurement were carried out. XRD shows the structure of sample is the cubic with the help of PCPDF win/ JCPDS-ICDD 1997. (author)

[en] Extended X-ray absorption fine structure data at the K-edge for three cobalt compounds viz., cobalt sulphate (I), cobalt nitrate (II) and cobalt chloride (III) have been analyzed for the estimation of phase parameters alpha1, beta1 and delta1. On the basis of our studies it may be concluded that backscattering phase shift and the total phase shift varies with the change in ligands. The total phase shift values for the presently studied compounds exhibit a linear variation with wave vector k. Average bond distances have been obtained for the samples studied using Levy's and Lytle, Stern, Sayers (LSS) method. The present method of determination of phase parameters using the graphical technique is simple and comparable to the other theoretical methods. (author)

[en] Proton induced X-ray emission (PIXE) by proton beam is one of the very important technique to find out concentration of element present in the sample. Elemental analyses of low Z element by K-X-ray and heavy element (28 < Z < 92) is being done by L-shell X-ray for this, reliable values of K and L, X-ray production cross-sections are important. The quantity of the element is directly related to K and L- shell X-ray production cross section. In present work K and L X-ray production cross section has been calculated to remove discrepancy between theory and available experimental data, by ECPSSR theory for target for Cr, Zn and Pb with correction of recoil energy of the proton in energy range 1.0-1.3 MeV. In ion- atom collision, although the recoil energy for low mass ions is not significant but we have seen a significant effect of recoil energy of proton in K and L shell X-ray production cross-section. (author)

[en] In the present work we have worked out a vector model for spontaneous emission based on the principle of moving vectors. This simplified approach reflects the work of Weisskopf and Wigner. Normalized probability of a transition to an upper level versus detuning has been plotted. Further we have shown that the areas which have been generated at phasor diagrams in different values of decay constants for moving vectors are directly proportional to time. This is a manifestation of Fermi's Golden rule. Fermi's Golden Rule in quantum mechanics is well known. But it is for the first time that we have worked out the concept of moving vectors using the transition probabilities and the concept of phasor diagrams to represent the Fermi's Golden rule. (author)

[en] Presented herein is the preparation of Nd doped ZnS thin films on glass substrate by simple nebulizer spray pyrolysis (NSP) method at 450 °C. XRD, SEM, and UV-Vis Spectrometer were used to analyze the structural, morphological, and optical behavior of the prepared samples. Nature of polycrystalline hexagonal structure with no secondary phases was confirmed by X-ray analysis. Extra particle creation on the surface of the Nd doped thin film was observed in high magnified SEM images. Room temperature PL studies depicts that the luminance behavior of the parent sample was enormously changed during the Nd element interstitial with ZnS lattice. Optical band gap value varies from 3.51 eV to 3.58 eV for 3% Nd doped ZnS film ascribed the increasing of film thickness and diminishing of film transparencies. (author)

[en] Quantum phase parameters have been studied in Multi-wave mixing using Barnett-Pegg formalism. It is shown that reduction of Carruther and Nieto symmetric quantum phase fluctuation parameter U with respect to its coherent state value corresponds to an antibunched state and thus phase fluctuation parameter can be used as a measure of nonclassicality of a state. Further, the measured values of Carruther and Nieto quantum phase parameters U, Q and S have been compared and found the reduction of U in five waves mixing optical process directly relates to antibunching

[en] The studied section of the Bima Formation at the Wuyo village composed of finning upward cycles of mudstones and medium-coarse grained sandstones sediments with total thickness of about 61.9m. The section consists of ten fining upwards sequence with individual cycles characterized by an erosional base overlying lithologies of either sandstone or mudstone beds. The lithofacies similarities also suggest hydrodynamic condition leading to their deposition is similar throughout. The geochemical plot of Al₂O₃/SiO₂ versus Fe₂O₃ + MgO wt% for the discrimination of sample plotted in and around (PM), (ACM), (CIA), (OIA). From all the plots of the four samples, three of the points falls outside all the fields and majority around the continental island arc (CIA) field; the remaining point falls within the active continental margin (ACM). In the Bivariate plot of (K₂O/Na₂O) against SiO₂, all the four points plotted falls within the active continental margin (ACM), while in the plot of K₂O/Na₂O versus Fe₂O₃ + MgO wt%, all four points plotted falls outside all the fields but are generally around oceanic island arc (OIA).The geochemical analysis showed few of the points fell within the oceanic island arc (OIA), continental island arc (OIA) and active continental margin (ACM) fields, while majority fell outside all fields but are generally around the active continental margin (ACM) fields, suggesting that most of the samples of the Bima studied at the Wuyo village formed in active continental margin (ACM) settings. This is also supported by the dominance of litharenite in the formation which indicates high tectonic activities. (author)