Dr Kerur hails from Gadag, the well know place for production of cotton, ground nets, Onion and Red Chilli. He born in a village called Aluvandi village, Tq. and Dist. Koppal He has completed up to secondary education at Gadag, B.Sc. degree from Karnataka Science College, Dharwad M Sc and Ph. D from Karnataka University, Dharwad. He got Ph D degree under the guidance of Professor S R Thondatadary in the field of Radiation Physics. He started his profession by joining as a Lecturer in Physics at Gulbarga University, Kalaburagi and he was serving as a Professor of Physics since September 2010 till his arrival here as Controller of Examination. He has experiences in administrative matters worked as Director of IQAC and Nodal Officer of RTI member of BOA, BOS and BOE’s of various universities in Karnataka and nearby States. Now, he is on deputation to Central University of Karnataka as Controller of Examinations since November 2018.
The natural radioactivity due to Radium, Thorium and Potassium in environmental samples such as s... more The natural radioactivity due to Radium, Thorium and Potassium in environmental samples such as soil and building materials contributes to the radiation dose received by human beings significantly. For assessing the environmental radiological impact to public it is essential to evaluate the activity levels of these nuclides. Using high-resolution Gamma ray spectrometry system the soil and few building material samples viz., granite, sand, brick collected from Shahpur region of North Karnataka were analysed and the radioactivity levels were estimated. The absorbed dose rate due to natural radionuclides was also calculated and the results are reported in this paper. The results obtained were observed to be normal in comparison with the World literature values for almost all samples whereas granite samples showed relatively higher activity and hence higher dose. This study provides a baseline data of radioactivity background levels in the Shahpur region of Gulbarga district and will be useful to assess any changes in the radioactive background level due to various man made processes.
A new and accurate method to determine the mass attenuation coefficient, µm, for low photon energ... more A new and accurate method to determine the mass attenuation coefficient, µm, for low photon energy employing NaI(Tl) X-ray detector and radioactive source is described. Effect of size of collimator and the selection of width of photopeak for integration on the contribution from scattered photons to the transmitted intensity is studied systematically and optimum size of collimator and photopeak limits for integration are established. With a 6 mm diameter collimator and FWHM for photopeak limits it was found that Beer-Lambert's law was rigorously valid over transmission range of 50-2%. Using this method µ mw as determined for six elements that covered a wide atomic number range (12 <Z< 73) and two biological equivalent materials. The values so obtained agreed with theoretical values within 1% establishing the validity and accuracy of the present method which uses inexpensive moderate resolution detector. As the method permits higher transmission range better counting statist...
Mass attenuation coefficients have been measured for rare-earth compounds at averaged photon ener... more Mass attenuation coefficients have been measured for rare-earth compounds at averaged photon energies 5.947 and 8.118keV. The measured values are compared with theoretical calculations. The disagreement between experiment and theory is larger than the experimental error when the incident photon energy is close to the L shell absorption edge. Further away from the edge the agreement between experiment and theory
The energy loss of 25 MeV protons in ferroelectric Barium Titanate [BT] single crystals was measu... more The energy loss of 25 MeV protons in ferroelectric Barium Titanate [BT] single crystals was measured as a function of the temperature of BT with an accuracy of 0.06%. When the protons traversed the crystal along the ferroelectric axis energy loss showed broad fluctuations with a peak-to-peak variation of 5% from the value at room temperature and the energy losses in ferroelectric and paraelectric phases of BT appeared to be nearly the same. When protons traversed the crystal in a direction perpendicular to the ferroelectric axis energy loss in the crystal remained independent of the crystal temperature in the ferroelectric phase. However, the energy loss in paraelectric phase appeared to be about 1.5% lower than that in the ferroelectric state. It is suggested that the observed results are indicative of a new mode of energy loss and can be related to the fluctuations in polarization of cluster of unit cells and the dynamics of their short-range order.
Mass attenuation coefficients have been meas-ured for rare earth compounds at photon ener-gies 8.... more Mass attenuation coefficients have been meas-ured for rare earth compounds at photon ener-gies 8.041, 8.907 and 13.347 keV. The measured values are compared with theoretical calcula-tions. The agreement between experiment and theory is more than the experimental error when the incident photon energy is around the edge of the element present in the compound and agreeing with the theoretical values elsewhere. The difference in agreement between the theo-retical values and experimental values is attrib-uted to the EXAFS effects on the mass attenua-tion coefficient values.
To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is n... more To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is necessary for accurate X-ray fluorescent analysis. The present measurement X-ray mass attenuation coefficients held in to two types of medicinal plants which are collected from Gulbarga and Bidar districts, using different X-ray energy range 32.890 KeV to 13.596 KeV. The Measurement performed using NaI (TI) detector which coupled to MCA and a source of 241Am is used to get X-rays in the energies of Ba, Ag, Mo, and Rb target in to different thickness (40 mg to 100 mg) pellet samples of Eucalyptus Obliqua and Mangifera indica medicinal plants. These two medicinal plants are used as medicines in the Indian herbal systems. The theoretical values are compared with the experimental values obtained using WinXCOM, which is personal computer software package. In this present study the mass attenuation coefficient of x-ray increases with decreasing energies.
To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is n... more To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is necessary for accurate X-ray fluorescent analysis. The present measurement X-ray mass attenuation coefficients held in to two types of medicinal plants which are collected from Gulbarga and Bidar districts, using different X-ray energy range 32.890 KeV to 13.596 KeV. The Measurement performed using NaI (TI) detector which coupled to MCA and a source of 241Am is used to get X-rays in the energies of Ba, Ag, Mo, and Rb target in to different thickness (40 mg to 100 mg) pellet samples of Eucalyptus Obliqua and Mangifera indica medicinal plants. These two medicinal plants are used as medicines in the Indian herbal systems. The theoretical values are compared with the experimental values obtained using WinXCOM, which is personal computer software package. In this present study the mass attenuation coefficient of x-ray increases with decreasing energies.
The natural radioactivity due to Radium, Thorium and Potassium in environmental samples such as s... more The natural radioactivity due to Radium, Thorium and Potassium in environmental samples such as soil and building materials contributes to the radiation dose received by human beings significantly. For assessing the environmental radiological impact to public it is essential to evaluate the activity levels of these nuclides. Using high-resolution Gamma ray spectrometry system the soil and few building material samples viz., granite, sand, brick collected from Shahpur region of North Karnataka were analysed and the radioactivity levels were estimated. The absorbed dose rate due to natural radionuclides was also calculated and the results are reported in this paper. The results obtained were observed to be normal in comparison with the World literature values for almost all samples whereas granite samples showed relatively higher activity and hence higher dose. This study provides a baseline data of radioactivity background levels in the Shahpur region of Gulbarga district and will be useful to assess any changes in the radioactive background level due to various man made processes.
A new and accurate method to determine the mass attenuation coefficient, µm, for low photon energ... more A new and accurate method to determine the mass attenuation coefficient, µm, for low photon energy employing NaI(Tl) X-ray detector and radioactive source is described. Effect of size of collimator and the selection of width of photopeak for integration on the contribution from scattered photons to the transmitted intensity is studied systematically and optimum size of collimator and photopeak limits for integration are established. With a 6 mm diameter collimator and FWHM for photopeak limits it was found that Beer-Lambert's law was rigorously valid over transmission range of 50-2%. Using this method µ mw as determined for six elements that covered a wide atomic number range (12 <Z< 73) and two biological equivalent materials. The values so obtained agreed with theoretical values within 1% establishing the validity and accuracy of the present method which uses inexpensive moderate resolution detector. As the method permits higher transmission range better counting statist...
Mass attenuation coefficients have been measured for rare-earth compounds at averaged photon ener... more Mass attenuation coefficients have been measured for rare-earth compounds at averaged photon energies 5.947 and 8.118keV. The measured values are compared with theoretical calculations. The disagreement between experiment and theory is larger than the experimental error when the incident photon energy is close to the L shell absorption edge. Further away from the edge the agreement between experiment and theory
The energy loss of 25 MeV protons in ferroelectric Barium Titanate [BT] single crystals was measu... more The energy loss of 25 MeV protons in ferroelectric Barium Titanate [BT] single crystals was measured as a function of the temperature of BT with an accuracy of 0.06%. When the protons traversed the crystal along the ferroelectric axis energy loss showed broad fluctuations with a peak-to-peak variation of 5% from the value at room temperature and the energy losses in ferroelectric and paraelectric phases of BT appeared to be nearly the same. When protons traversed the crystal in a direction perpendicular to the ferroelectric axis energy loss in the crystal remained independent of the crystal temperature in the ferroelectric phase. However, the energy loss in paraelectric phase appeared to be about 1.5% lower than that in the ferroelectric state. It is suggested that the observed results are indicative of a new mode of energy loss and can be related to the fluctuations in polarization of cluster of unit cells and the dynamics of their short-range order.
Mass attenuation coefficients have been meas-ured for rare earth compounds at photon ener-gies 8.... more Mass attenuation coefficients have been meas-ured for rare earth compounds at photon ener-gies 8.041, 8.907 and 13.347 keV. The measured values are compared with theoretical calcula-tions. The agreement between experiment and theory is more than the experimental error when the incident photon energy is around the edge of the element present in the compound and agreeing with the theoretical values elsewhere. The difference in agreement between the theo-retical values and experimental values is attrib-uted to the EXAFS effects on the mass attenua-tion coefficient values.
To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is n... more To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is necessary for accurate X-ray fluorescent analysis. The present measurement X-ray mass attenuation coefficients held in to two types of medicinal plants which are collected from Gulbarga and Bidar districts, using different X-ray energy range 32.890 KeV to 13.596 KeV. The Measurement performed using NaI (TI) detector which coupled to MCA and a source of 241Am is used to get X-rays in the energies of Ba, Ag, Mo, and Rb target in to different thickness (40 mg to 100 mg) pellet samples of Eucalyptus Obliqua and Mangifera indica medicinal plants. These two medicinal plants are used as medicines in the Indian herbal systems. The theoretical values are compared with the experimental values obtained using WinXCOM, which is personal computer software package. In this present study the mass attenuation coefficient of x-ray increases with decreasing energies.
To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is n... more To study the X-ray Mass attenuation coefficients of different materials and medicinal plants is necessary for accurate X-ray fluorescent analysis. The present measurement X-ray mass attenuation coefficients held in to two types of medicinal plants which are collected from Gulbarga and Bidar districts, using different X-ray energy range 32.890 KeV to 13.596 KeV. The Measurement performed using NaI (TI) detector which coupled to MCA and a source of 241Am is used to get X-rays in the energies of Ba, Ag, Mo, and Rb target in to different thickness (40 mg to 100 mg) pellet samples of Eucalyptus Obliqua and Mangifera indica medicinal plants. These two medicinal plants are used as medicines in the Indian herbal systems. The theoretical values are compared with the experimental values obtained using WinXCOM, which is personal computer software package. In this present study the mass attenuation coefficient of x-ray increases with decreasing energies.
Uploads
Papers by Basavaraj Kerur