Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Khanna, K. M." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-5 z 5
    Tytuł:
    A modified Nuclear Model for Binding Energy of Nuclei
    Autorzy:
    Sirma, K. K.
    Chelimo, L. S.
    Khanna, K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030120.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Core
    Heavy Nuclei
    Isotones
    Isotopes
    Potential
    Surface region
    light Nuclei
    Opis:
    A new nuclear model to calculate the binding energy of nuclei is proposed. The nucleus is assumed to be composed of two regions; the inner core region and surface region. The inner core is assumed to be composed of Z proton-neutron pairs (Z = N) and the surface region is composed of the unpaired neutrons for a nucleus in which N>Z. The interaction between the core and neutrons in the surface region is assumed to be such that it leads to an average potential Vo in which each neutron in the surface region can move. Knowing the experimental values for the binding energy of nuclei, this average interaction potential Vo has been calculated for light, medium and heavy nuclei. It is found that Vo varies for isotopes and isotones. For isotopes the value of Vo decreases as the neutron number (N) in the surface region of the nucleus increases. The decrease in Vo is quite large when the neutron number increases by unity in light nuclei compared to heavy nuclei. For isotones, the value of Vo increases with an increase in proton number (Z). This is evident for both light nuclei and heavy nuclei.
    Źródło:
    World Scientific News; 2020, 143; 203-223
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quasi-Particle Energy of a Mixture of Two-Component Gas of Bosons
    Autorzy:
    Namwetako, Jophine S.
    Cherop, Hezekiah K.
    Khanna, Kapil M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030479.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bogoliubov canonical Transformation
    Quasi-particle spectrum
    interacting system
    two-component gas
    Opis:
    The properties of two component interacting gas of bosons are studied by assuming two slightly different types of interactions between the atoms of the two gases. The system is described by two operators a and b, that are used to diagonalize the Hamiltonian of the system by the method of Bogoliubov or canonical transformation. The diagonalized Hamiltonian gives the quasi-particle energy spectrum of the system. From the quasi-particle energy spectrum, the role of interaction in each interacting system is studied. The interacting system, which is more likely to be physically acceptable, and can undergo phase transition, is pointed out.
    Źródło:
    World Scientific News; 2020, 144; 114-125
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation between growth mechanisms and the influence of process control parameters on physical properties of titanium dioxide nanotubes in electrochemical anodisation
    Autorzy:
    Kioko, S.
    Khanna, K. M.
    Österlund, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193444.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anodization
    High field
    Nanotubes
    Titanium dioxide
    Tunneling
    Opis:
    The growth of thin oxide films has been covered by several theories and models. The high electrical field model, Fowler-Nordheim tunneling in Metal Oxide films and Schottyky barrier Mechanisms are models which explain metal oxide formation. The growth mechanisms and process control parameters during thin film growth in electrochemical anodization play a key role in the growth process. This work explores how the growth mechanisms correlate with process control parameters to influence the growth process in electrochemical anodization of titanium dioxide nanotubes (TNTs). The theories on growth mechanism have been explained in detail. On the experimental part, TiO2 nanotubes were synthesized for photocatalytic activity using electrochemical anodization in a third generation electrolyte. The electrolyte comprised of a mixture of ethylene glycol and ammonium fluoride in little amount of water. Anodizing time and electrode separation distance were explored as process control parameters. The TNTs were analysed using SEM, XRD, Profilometer and UV-Visible spectrophotometer. Short electrode separation distance recorded fast growth, non-uniformity in TNTS, disorganisation, distortion and etching of TNTs. The TNT length, inner and outer diameters reduced with increasing electrode separation distance due to reduction of electric field, increased bulk resistance. There was no significant increase in TNT dimensions at electrode separation distance of 4.5 cm which also recorded the smallest grain size for the TNTs highest degree of crystallinity for with absorption maxima at 550 nm. TNT length, inner and outer diameters and crystallinity increased with anodising time.
    Źródło:
    World Scientific News; 2021, 157; 80-104
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified Integrated Nuclear Model for the Binding Energy of Finite Nuclei
    Autorzy:
    Cherop, Hezekiah K.
    Khanna, Kapil M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031026.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nuclear model
    binding energy
    binding fraction
    nuclei
    Opis:
    A modified integrated nuclear model (MINM) for calculating the binding energies of finite nuclei is proposed. The model is an improvement of the integrated nuclear model (INM) that was formulated based on the theory of quantum chromodynamics. MINM is a simple model that depends on the proton and neutron numbers, and a variable stability coefficient factor denoted by λ. The variable λ rectifies the inequality in the neutron to proton ratio that results from the increase in the size of the nucleus. The results of the binding fraction obtained from MINM were compared with the existing experimental data obtained from atomic mass evaluation tables, AME2016. It was found that, the root mean square deviation for the binding fractions obtained from MINM is 0.2267 MeV with respect to the experimental data, while the root mean square deviation for the binding fraction obtained from INM is 1.5801 MeV. The root mean square deviation for MINM is very small. This supports the validity of the MINM and the consequent accuracy in the values of the binding fraction for different nuclei, especially in the region whereby A>220.
    Źródło:
    World Scientific News; 2020, 149; 36-51
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified Phenomenological Formula for the Ground State Energy of Light Nuclei
    Autorzy:
    Chemogos, P. K.
    Muguro, K. M.
    Khanna, K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046531.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    binding energy
    ground state energy
    isotopes
    light nuclei
    liquid drop model
    Opis:
    A modified phenomenological formula for the ground state binding energy in the region of light nuclei is proposed. Since binding energy is proportional to the volume of a nuclide, the new formula contains a volume term proportional to the mass number A and expresses asymmetry energy and coulomb repulsion energy between protons in a much simpler form than the way it is presented in the liquid drop model. The formula is used to calculate nuclear binding energy using three terms only, namely mass number A, neutron number, N and atomic number, Z. The correspondence with the conventional Liquid drop model and with the experimental results is highly satisfactory for light nuclei. Considering a set of 60 light nuclei for A≤55, the formula yields root mean square deviation of 0.541 MeV, with respect to experimental values. This is better than conventional Liquid drop model which gives a root mean square deviation of 3.485 MeV over the same range of nuclei. The value of f is comparatively smaller for even-odd nuclei when compared to the corresponding even-even nuclei. Thus even-even nuclei are more strongly bound than odd-odd or even-odd nuclei making them more stable.
    Źródło:
    World Scientific News; 2019, 136; 148-158
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies