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Generally, people use Monte Carlo and Geant4 methods to simulate the interactions of gamma photons with the detectors (NaI(Tl), Ge(Li), HPGe and so on), to calculate the response function of detecting system. But when they make separate lines of the measured spectra, energy peaks are hard to simulate for noise signals. In order to including noise signals(More)
In order to measure the surface contamination level effectively, the large area surface contamination measuring instrument is widely used. This research designs a thin-window flow gas proportional counter with 1000cm<sup>2</sup> detecting area. When to achieve simultaneous measurement of &#x03B1; and &#x03B2; rays in using pulse-height discrimination(More)
Gamma spectra is the fingerprint of uranium materials in the arms control verification technology. To calculate and analyse delayed gamma spectra of fission products, we simplified the decay chain into basic state linear chain and excitation state linear chain. We deduced formulas of the changing rule for nuclide number before and after zero-time. We made(More)
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