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Delayed coincidence method to distinguish radon isotopes Simulation

Author: WangXiZong
Tutor: ZhouJianLiangï¼›YanYongJun
School: Nanhua University
Course: Radiation protection and environmental protection
Keywords: Radon isotopes Radon progeny Delayed coincidence method Digitizing Simulation
CLC: O562.6
Type: Master's thesis
Year: 2010
Downloads: 37
Quote: 0
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Abstract


Radium isotopes [ 1 ] tracer studies in oceanography has wide application , such as coastal and estuarine waters of 1-10 days oceanographic processes. Using the delayed coincidence logic circuit radon isotopes [ 2 ] is an important indirect means of radium isotopes to distinguish , at present the method has become one of the important oceanographic research . In this paper, a software emulation mode produces isotopes of radon and its imitation of a nuclear pulse data , discover software approach to implementing delayed coincidence method to distinguish radon isotopes ; flexible and convenient way to change the delay time and the door has a good time looking resolving effect , simulation total number of particles and different for different AR activity ratio in case of delayed coincidence radon parameter settings. Open time is found to radon daughter isotope half-life 3-5 times more appropriate , and with foreign literature test results were measured in comparison, the results show that this method can reduce the cost of measurement , easy to adjust the delay time of the low activity degree radon isotope measurements have reference. While the figures correspond conducted a preliminary study , simulation [ 3 ] studied the ADC sampling rate and sampling digits for double exponential nuclear pulse signals, and uses four kinds of band-pass filter algorithm digitized double exponential [ 4 ] conducted a nuclear pulse shaping filter research , through the study found , elliptic filter [ 6 ] for the high-frequency noise filtering effect is better.

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CLC: > Mathematical sciences and chemical > Physics > Molecular physics, atomic physics > Atomic Physics > Isotope
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