Passive fast neutron multiplicity counting system based on liquid scintillation detectors

Yuezhuang LIU; Shaodong ZHANG; Yuanjiang YOU; Xurun LIN; Zhibo ZHOU; Duohong LI; Xingyu ZHOU; Mengyuan LI; Baoliang JIN; Meng LI; Lin MA; Qi ZHANG; Da LI; Zhaohui WU; Xiaodong ZHANG

doi:10.11889/j.0253-3219.2025.hjs.48.240364

NUCLEAR TECHNIQUES, Volume. 48, Issue 5, 050401(2025)

Passive fast neutron multiplicity counting system based on liquid scintillation detectors

Yuezhuang LIU¹, Shaodong ZHANG^1,3, Yuanjiang YOU¹, Xurun LIN¹, Zhibo ZHOU², Duohong LI², Xingyu ZHOU¹, Mengyuan LI¹, Baoliang JIN¹, Meng LI¹, Lin MA¹, Qi ZHANG¹, Da LI², Zhaohui WU², and Xiaodong ZHANG^4、*

Author Affiliations

¹School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China

²State Nuclear Security Technology Center, Beijing 102401, China

³China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518031, China

⁴Shenzhen Key Laboratory of Nuclear and Radiation Safety, Institute for Advanced Study in Nuclear Energy & Safety, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(16)

Fig. 1. Photographs of the FNMC system and its readout electronics

Download full size

View in Article

Fig. 2. Photograph of the self-developed 32-channel high-voltage power supply

Download full size

View in Article

Fig. 3. Screen-shot of the self-developed 32-channel high-voltage power supply control software

Download full size

View in Article

Fig. 4. Screen-shots of the user-friendly graphical interface of the FNMC system

Download full size

View in Article

Fig. 5. Neutron-gamma discrimination spectra of detector No.0 in the FNMC system

Download full size

View in Article

Fig. 6. Fitting results of the FNMC device using the Doubles parameter method

Download full size

View in Article

Fig. 7. Measurement results of the FNMC system with the fast neutron multiplicity analytical method (a) The estimated spontaneous fission rate, (b) The relative differences of the estimated spontaneous fission rate

Download full size

View in Article

Fig. 8. Photographs of different test scenarios(a) Layout of the test scenarios, (b) Source, (c) Source+ lead, (d) Source+ polyethylene

Download full size

View in Article

Fig. 9. Neutron multiplicity counting rates under different radiation backgrounds (color online) (a) Count rates of background, (b) Count rates of the test samples

Download full size

View in Article

Fig. 10. Measurement results of the spontaneous fission rate of a ²⁵²Cf neutron source using the fast neutron multiplicity analytical method under different radiation backgrounds (a) Estimated spontaneous fission rate, (b) Relative differences of the estimated spontaneous fission rate

Download full size

View in Article

Table 1. The spontaneous fission rate for the ²⁵²Cf neutron sources
View table
View in Article
Table 1. The spontaneous fission rate for the ²⁵²Cf neutron sources
样品编号
Sample number
自发裂变率
Spontaneous fission rate / fissions $∙$ s^-1
1# 732.77
2# 1 484.60
3# 2 185.32
4# 3 669.92
5# 4 402.68
6# 28 593.69

Table 2. Measured Doubles rate of ²⁵²Cf neutron sources with known spontaneous fission rate
View table
View in Article
Table 2. Measured Doubles rate of ²⁵²Cf neutron sources with known spontaneous fission rate
样品编号
Sample number
Doubles计数率
Doubles rate / s^-1
1# 1.80±0.03
2# 3.53±0.04
3# 5.19±0.06
4# 8.70±0.09
6# 65.77±1.04

Table 3. The neutron multiplicity count rate of ²⁵²Cf neutron source measured by the FNMC device

View table

View in Article

Table 3. The neutron multiplicity count rate of ²⁵²Cf neutron source measured by the FNMC device

样品编号 Sample number / #	总中子计数率 Singles rate / s^-1	双重中子符合计数率 Doubles rate / s^-1	三重中子符合计数率 Triples rate / s^-1
1	60.90±0.15	1.80±0.03	0.03±0.003
2	123.24±0.26	3.53±0.04	0.05±0.005
3	179.36±0.35	5.19±0.06	0.07±0.007
4	299.44±0.53	8.70±0.09	0.14±0.01
5	355.13±0.64	10.09±0.11	0.15±0.01
6	2 278.36±6.12	65.77±1.04	1.03±0.13

Table 4. Spontaneous fission rate of ²⁵²Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

View table

View in Article

Table 4. Spontaneous fission rate of ²⁵²Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

样品编号 Sample number / #	自发裂变率 Spontaneous fission rate / fissions∙s^-1	评估的自发裂变率 Estimated spontaneous fission rate / fissions∙s^-1	相对偏差 Relative difference / %
1	732.77	759.45±10.91	3.64±1.49
2	1 484.60	1 487.28±18.31	0.18±1.23
3	2 185.32	2 184.62±23.92	-0.03±1.09
4	3 669.92	3 662.43±38.01	-0.20±1.04
5	4 402.68	4 247.42±45.29	-3.53±1.03
6	28 593.69	27 696.99±437.98	-3.14±1.53

Table 5. The neutron multiplicity count rate for different test scenarios

View table

View in Article

Table 5. The neutron multiplicity count rate for different test scenarios

测试场景 Test scenario	本底计数率 Count rate of background / s^-1			待测样品计数率 Count rate of the test samples / s^-1
测试场景 Test scenario	总中子计数率 Singles rate / s^-1	双重中子计数率 Doubles rate / s^-1	三重中子计数率 Triples rate / s^-1	总中子计数率 Singles rate / s^-1	双重中子计数率 Doubles rate / s^-1	三重中子计数率 Triples rate / s^-1
自然本底 Natural background	0.51±0.02	0.001±0.000 8	0.00±0.00	122.49±0.27	3.43±0.04	0.07±0.01
干扰源+聚乙烯 Source+polyethylene	47.27±0.29	0.16±0.02	0.00±0.00	169.72±0.39	3.62±0.06	0.06±0.01
干扰源+铅 Source+lead	73.97±0.28	0.20±0.01	0.00±0.00	196.80±0.37	3.75±0.05	0.06±0.01
干扰源 Source	111.42±0.46	0.33±0.03	0.00±0.00	233.53±0.47	3.87±0.06	0.05±0.01

Table 6. Spontaneous fission rate of ²⁵²Cf neutron sources measured for different test scenarios

View table

View in Article

Table 6. Spontaneous fission rate of ²⁵²Cf neutron sources measured for different test scenarios

测试场景 Test scenario	评估的自发裂变率 Estimated spontaneous fission rate / fissions∙s^-1	相对偏差 Relative difference / %
自然本底 Natural background	1 445.32±18.93	-2.65±1.28
干扰源+聚乙烯 Source+polyethylene	1 457.38±25.07	-1.83±1.69
干扰源+铅 Source+lead	1 496.13±22.17	0.78±1.49
干扰源 Source	1 488.49±27.74	0.26±1.87

Tools

Get Citation

Copy Citation Text

Yuezhuang LIU, Shaodong ZHANG, Yuanjiang YOU, Xurun LIN, Zhibo ZHOU, Duohong LI, Xingyu ZHOU, Mengyuan LI, Baoliang JIN, Meng LI, Lin MA, Qi ZHANG, Da LI, Zhaohui WU, Xiaodong ZHANG. Passive fast neutron multiplicity counting system based on liquid scintillation detectors[J]. NUCLEAR TECHNIQUES, 2025, 48(5): 050401

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: NUCLEAR ELECTRONICS AND INSTRUMENTATION

Received: Sep. 14, 2024

Accepted: --

Published Online: Jun. 26, 2025

The Author Email: Xiaodong ZHANG (张小东)

DOI:10.11889/j.0253-3219.2025.hjs.48.240364

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. The spontaneous fission rate for the 252Cf neutron sources

Table 1. The spontaneous fission rate for the 252Cf neutron sources

Table 2. Measured Doubles rate of 252Cf neutron sources with known spontaneous fission rate

Table 2. Measured Doubles rate of 252Cf neutron sources with known spontaneous fission rate

Table 3. The neutron multiplicity count rate of 252Cf neutron source measured by the FNMC device

Table 3. The neutron multiplicity count rate of 252Cf neutron source measured by the FNMC device

Table 4. Spontaneous fission rate of 252Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

Table 4. Spontaneous fission rate of 252Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

Table 5. The neutron multiplicity count rate for different test scenarios

Table 5. The neutron multiplicity count rate for different test scenarios

Table 6. Spontaneous fission rate of 252Cf neutron sources measured for different test scenarios

Table 6. Spontaneous fission rate of 252Cf neutron sources measured for different test scenarios

Table 1. The spontaneous fission rate for the ²⁵²Cf neutron sources

Table 1. The spontaneous fission rate for the ²⁵²Cf neutron sources

Table 2. Measured Doubles rate of ²⁵²Cf neutron sources with known spontaneous fission rate

Table 2. Measured Doubles rate of ²⁵²Cf neutron sources with known spontaneous fission rate

Table 3. The neutron multiplicity count rate of ²⁵²Cf neutron source measured by the FNMC device

Table 3. The neutron multiplicity count rate of ²⁵²Cf neutron source measured by the FNMC device

Table 4. Spontaneous fission rate of ²⁵²Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

Table 4. Spontaneous fission rate of ²⁵²Cf neutron sources measured by the FNMC system with the fast neutron multiplicity analytical method

Table 6. Spontaneous fission rate of ²⁵²Cf neutron sources measured for different test scenarios

Table 6. Spontaneous fission rate of ²⁵²Cf neutron sources measured for different test scenarios