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Natural and artificial radioactivity levels in sediments along the Kenyan coast

Hashim, N. O.; Rathore, I. V. S.; Kinyua, A. M.; Mustapha, A. O. (Elsevier, 2004-11)

Exposures to various components of the natural background radiation in Kenya were estimated using measured activity concentrations of natural radionuclides and conversion factors. Contributions to the total effective dose ...

An investigation of the repeatability of calibration factors in gamma-ray spectrometry of geological materials

Mustapha, A.O.; Patel, J. P.; Rathore, I. V. S.; Hashim, N. O.; Otwoma, D. (Elsevier, 2004-01)

A NaI(Tl)-based gamma spectrometer for the analysis of geological materials was calibrated using the IAEA reference materials RGU-1, RGTH-1 and RGK-1. To simulate typical geological samples, two additional standards were ...

Charge Transport Mechanism in Thin Cuticles Holding Nandi Flame Seeds

Rathore, I. V. S.; Kipnusu, Wycliffe K; Katana, Gabriel; Migwi, C. M.; Sangoro, Joshua R (International Journal of Biomaterials, 2009)

Metal-sample-metal sandwich configuration has been used to investigate DC conductivity in 4 mum thick Nandi flame [Spathodea campanulata P. Beauv.] seed cuticles. J-V characteristics showed ohmic conduction at low fields ...

Electrical Switching in Thin Films of Nandi Flame Seeds Cuticles

Kipnusu, W. K.; Katana, G.; Migwi, C. M.; Rathore, I. V. S.; Sangoro, J. R. (Hindawi Publishing Corporation, 2009)

Current-voltage (I-V) characteristics of Nandi flame seed cuticles (NFSCs) have been studied as a function of irradiation, annealing, and poling temperature. The cuticles showed memory and threshold switching. Threshold ...