ACCURATE DETERMINATION OF SOURCE DISINTEGRATION RATES WITH NaI (Tl) GAMMA RAY SPECTROMETER

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dc.contributor.authorNASIRU, SA’ADU
dc.date.accessioned2014-02-27T10:18:16Z
dc.date.available2014-02-27T10:18:16Z
dc.date.issued2006-08
dc.descriptionA Thesis submitted to the Post Graduate School, Ahmadu Bello University, Zaria, Nigeria. In partial fulfillment of the requirement for the award of the degree Master of Science (Physics) Physics Department, Ahmadu Bello University, Zaria, Nigeria. AUGUST 2006.en_US
dc.description.abstractThe aim of this project is to measure the absolute activity (disintegration rates) of gamma sources. The measurement was achieved using a NaI (Tl) spectrometer. The major factors that contribute to uncertainties in the measurement were taken in to account and relevant uncertainties were propagated accordingly. The spectrometre is fully setup for disintegration rates determination. The spectrometer was calibrated for efficiency at three chosen geometries (10, 14 and 20) cm, the calibration was performed in such a way that significant factors that affect the measurements were considered. The fitted efficiency function coefficients at these chosen levels were obtained and used to write a computer program that calculates the measured absolute activity of sources and its uncertainty easily. The energy gamma range covered by the work is (59 to 1836) KeY. Therefore the work was able to integrate IAEA Quality Assurance (QA) recommendations, to simplify an accurate methodology for setting up gamma ray spectrometres, using a NaI(Tl) spectrometre. The setup spectrometre used to determine the absolute activity of two old standard calibration sources 137Cs and 60Co, the activity of the 137Cs compared well with that quoted by the manufacturer, while that of 60Co did not agree, its activity was determined to be (31319 ± 2153) BG, because it leaked prior to this work, it can henceforth be used when needed.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/2867
dc.language.isoenen_US
dc.subjectACCURATE,en_US
dc.subjectDETERMINATION,en_US
dc.subjectDISINTEGRATION,en_US
dc.subjectRATES,en_US
dc.subjectGAMMA RAY,en_US
dc.subjectSPECTROMETER.en_US
dc.titleACCURATE DETERMINATION OF SOURCE DISINTEGRATION RATES WITH NaI (Tl) GAMMA RAY SPECTROMETERen_US
dc.typeThesisen_US
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