Temperature control fluid neutron spectrometer and measurement method and analysis processing system thereof
A technology of a neutron spectrometer and a measurement method, which is applied in the field of neutron energy spectrum measurement, can solve the problems of inability to detect neutrons above 20MeV, mutual interference of detection systems, insufficient number of solving spectrum equations, etc. Poor, to ensure accuracy and stability, to improve the effect of sensitivity
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Embodiment 1
[0063] It is known that neutrons and different nuclides in other substances will undergo capture (n, γ) and inelastic scattering reactions (n, n'γ). In a short time (less than 10-13s), characteristic gamma rays are emitted. The detection of thermal neutrons can obtain the energy spectrum information of the neutron field to be measured through the energy and intensity information of thermal neutrons, or detect the energy and intensity of characteristic gamma rays. If the material and structure of the substance are known, use the characteristic The energy and intensity information of gamma rays can also obtain the energy spectrum information of the neutron field to be measured.
[0064] Based on the characteristics of the above-mentioned neutrons, a temperature-controlled fluid neutron spectrometer provided by the present invention includes at least a base, a fluid chamber and a detector fixed on the base, and a fluid pool communicated with the fluid chamber; The fluid chamber ...
Embodiment 2
[0076] see Figure 8 , the present embodiment provides a measurement method of a temperature-controlled fluid neutron spectrometer, which can be applied to a temperature-controlled fluid neutron spectrometer described in Embodiment 1, comprising the steps of:
[0077] S1. According to the thermal neutron counts or prompt gamma counts of the neutron field to be measured measured by the detector 5 in different temperature ranges, calculate the thermal neutron count rate or gamma characteristic peak count rate and compile it into a corresponding response matrix.
[0078] The step S1 specifically includes:
[0079] Heating fluid 8, using neutron detector 5 to measure T in M temperature intervals M The actual counting rate of thermal neutrons is obtained by counting the thermal neutrons generated in the fluid chamber 9 followed by Compiled into M actual count rate matrices with 1 row and j columns;
[0080] Alternatively, use the gamma ray detector 5 to measure T in m tempe...
Embodiment 3
[0110] Embodiment 3 of the present invention also provides an analysis and processing system 10 of a temperature-controlled fluid neutron spectrometer, which can be used in the temperature-controlled fluid neutron spectrometer described in Embodiment 1, such as Figure 9 As shown, it includes a signal collection unit 101 , a data processing unit 102 and a display unit 103 connected in sequence.
[0111] The signal collection unit 101 is used to connect to the detector 5 of the temperature-controlled fluid neutron spectrometer, so as to obtain the thermal neutron count or instantaneous gamma count and fluid temperature measured by the detector 5 . The signal collection unit 101 can adopt a data transmission line to be connected between the signal output end of the detector 5 and the signal input end of the data processing unit 302; Interactively, the corresponding pulse signal can be obtained.
[0112] The data processing unit 102 is used to perform the measurement method of a...
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