A Comparative Study Of Multi-detector Testing Method Of Lead Based On PGNAA

We use neutron generator as the source, adopt prompt neutron induced radioactivity nuclide to sendγray analytical technique, use iodination sodium detector and germanium sour bismuth detector to carry on the measurement of the energy spectrum, and record counting spectrum under different detector conditions of promptγray after studying the lead element.This article introduces the principle surveyed of Scintillation Detector, and prompt neutron induced radioactivity nuclide to sendγray analytical technique. We record counting spectrum under different detector conditions of promptγray after studying the lead element, compare and analyze two kinds of all-round peak area of element characteristic of lead which detects measures by regarding soil as carriers after passing a large number of experiments. The result of study shows that, all-round peak area of element characteristic of lead that different detectors measure is different. Though the survey range of the iodination sodium detector, in 60KeV- 3.5MeV, unable in plumbous high-energyγray (7.368MeV) with the germanium sour bismuth detector compare, all-round peak area of element characteristic of lead which detects measures of sodium iodide in the intersection of 2.606MeV is much less than that of germanium sour bismuth detector. Additionally because the plumbous response section is relatively low, it is suitable for adopting the detector of high count rate such as BGO detector, in order to increase plumbous reaction probability. Though NaI(Tl) which the resolution ratio of the detector is better, it is suitable for measuring energy to be low reacting the intersection of section and relatively high element. As a result, NaI(Tl) detector compares the unsuitable analysis of going on the lead element with the BGO detector.