Influence of thermal and resonance neutron on fast neutron flux measurement by <SUP>239</SUP>Pu fission chamber

ZENG Li-Na; WANG Qiang; SONG Ling-Li; ZHENG Chun

doi:10.1088/1674-1137/39/1/016001

Chinese Physics C> 2015, Vol. 39> Issue(1) : 016001 DOI: 10.1088/1674-1137/39/1/016001

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber

Abstract
HTML
Reference
Related

PDF

Abstract：
The ²³⁹Pu fission chambers are widely used to measure fission spectrum neutron flux due to a flat response to fast neutrons. However, in the meantime the resonance and thermal neutrons can cause a significant influence on the measurement if they are moderated, which could be eliminated by using ¹⁰B and Cd covers. At a column enriched uranium fast neutron critical assembly, the fission reaction rates of ²³⁹Pu are measured as 1.791× 10^-16, 2.350×10^-16 and 1.385× 10^-15 per second for 15 mm thick ¹⁰B cover, 0.5 mm thick Cd cover, and no cover respectively, while the fission reaction rate of ²³⁹Pu is rapidly increased to 2.569× 10^-14 for a 20 mm thick polythene covering fission chamber. The average ²³⁹Pu fission cross-section of thermal and resonance neutrons is calculated to be 500 b and 24.95 b with the assumption of 1/v and 1/E spectra respectively, then thermal, resonance and fast neutron flux are achieved to be 2.30× 10⁶, 2.24× 10⁶ and 1.04× 10⁸ cm^-2·^-1.

References

[1]

Stenkin Yu V, Alekseenko V V, Gromushkin D M et al. Chin. Phys. C. 2013, 37(efeq1): 015001-015001[2] WANG Wen-Xin, ZHANG Yi, WANG Ji-Jin, HU Bi-Tao. Chin. Phys. C. 2009, 33(efeq2): 110-113[3] Cabellos O, Fernádez P, Rapisardac D, García-Herranz N et al. Nucl. Instrum. Methods Phys. Res. A, 2010, 618(1-3): 248-259[4] SONG Yu-Shou, Margaryan A, HU Bi-Tao, TANG Li-Guang. Chin. Phys. C, 2011, 35(8): 758-762[5] Chuklyaev S V, Pepyolyshev Yu N, Artem'ev V A. Instrum. Exp. Techn., 2002, 45(efeq2): 162-166[6] Unesaki Hironobu, Iwasaki Tomohiko, Kitada Takanori et al. Nucl. Sci. Technol., 2000, 37(8): 627-635[7] Loaiza D, Daniel Gehman. Ann. Nucl. Energy, 2006, 33: 1339-1359[8] TIAN J M, XU M H, ZHAO ZL et al. Chin. Phys. C, 2012, 36(4): 329-333[9] Calviani M, Cennini P, Karadimos D, Ketlerov V, Konovalov V, Furman W, Goverdowski A, Vlachoudis V, Zanini L. Nucl. Instrum. Methods Phys. Res. A, 2008, 594(efeq2): 220-227[10] Loiseau P et al. Nucl. Instrum. Methods Phys. Res. A, 2013, 707: 58-63

[1]	Yong-Jing Chen , Yang Su , Li-Le Liu , Guoxiang Dong , Zhigang Ge , Nengchuan Shu , Xiaobao Wang . Microscopic study of neutron-induced fission process of ²³⁹Pu via zero- and finite-temperature density functional theory. Chinese Physics C, 2023, 47(5): 054103. doi: 10.1088/1674-1137/acbe2c
[2]	Fanglei Zou , Xiaojun Sun , Kai Zhang , Hongfei Chen , Jie Yan , Junlong Tian , Yunyi Cui . Pre-neutron fragment mass yields for ²³⁵U(n, f ) and ²³⁹Pu(n, f ) reactions at incident energies from thermal up to 20 MeV. Chinese Physics C, 2023, 47(4): 044101. doi: 10.1088/1674-1137/acb910
[3]	Cui Zhu , Xia Zhou , Na Wang . Rotational energy conversion and thermal evolution of neutron stars. Chinese Physics C, 2017, 41(12): 125104. doi: 10.1088/1674-1137/41/12/125104
[4]	Hao-Jun Zhou , Yan-Peng Yin , Xiao-Qiang Fan , Zheng-Hong Li , Yi-Kang Pu . Measurements of effective delayed neutron fraction in a fast neutron reactor using the perturbation method. Chinese Physics C, 2016, 40(6): 068201. doi: 10.1088/1674-1137/40/6/068201
[5]	Ke Li , Jian-Rong Zhou , Xiao-Dong Wang , Tao Xiong , Ying Zhang , Yu-Guang Xie , Liang Zhou , Hong Xu , Gui-An Yang , Yan-Feng Wang , Yan Wang , Jin-Jie Wu , Zhi-Jia Sun , Bi-Tao Hu . Study of a nTHGEM-based thermal neutron detector. Chinese Physics C, 2016, 40(7): 076002. doi: 10.1088/1674-1137/40/7/076002
[6]	Yi Liu , Yi-Gang Yang , Yang Tai , Zhi Zhang . A capture-gated fast neutron detection method. Chinese Physics C, 2016, 40(7): 076201. doi: 10.1088/1674-1137/40/7/076201
[7]	SHU Neng-Chuan , JIA Min , CHEN Yong-Jing , LIU Ting-Jin . Prompt fission neutron spectra of n+²³⁵U above the (n,nf) fission threshold. Chinese Physics C, 2015, 39(5): 054101. doi: 10.1088/1674-1137/39/5/054101
[8]	YANG Lei , ZHOU Jian-Rong , SUN Zhi-Jia , ZHANG Ying , HUANG Chao-Qiang , SUN Guang-Ai , WANG Yan-Feng , YANG Gui-An , XU Hong , XIE Yu-Guang , CHEN Yuan-Bo . Experimental research on a THGEM-based thermal neutron detector. Chinese Physics C, 2015, 39(5): 056002. doi: 10.1088/1674-1137/39/5/056002
[9]	XING Hao-Yang , WANG Li , ZHU Jing-Jun , TANG Chang-Jian , YUE Qian . Simulation of large-scale fast neutron liquid scintillation detector. Chinese Physics C, 2013, 37(2): 026003. doi: 10.1088/1674-1137/37/2/026003
[10]	LIU Ye , MA Xin-Hua , ZHAO Jing . Thermal neutron flux produced by EAS at various altitudes. Chinese Physics C, 2013, 37(1): 015001. doi: 10.1088/1674-1137/37/1/015001
[11]	ZHANG Jian-Yong , FU Cheng-Dong , MO Xiao-Hu , ZHANG Zi-Liang , LI Dao-Wu , WANG Bao-Yi . Effects due to a Pu-C source on a HPGe detector and the corresponding neutron shielding. Chinese Physics C, 2011, 35(7): 660-667. doi: 10.1088/1674-1137/35/7/011
[12]	DOU Hai-Feng , TANG Bin . An empirical formula for scattered neutron components in fast neutron radiography. Chinese Physics C, 2011, 35(5): 483-487. doi: 10.1088/1674-1137/35/5/016
[13]	WANG Yi , CHENG Jian-Ping , LI Yuan-Jing , LUO Ming , ZHANG Guo-Guang . An MRPC for fast neutron detection. Chinese Physics C, 2010, 34(1): 88-91. doi: 10.1088/1674-1137/34/1/016
[14]	WANG Wen-Ming , LI Xia , ZHAO Zhi-Xiang , ZHOU Zu-Ying , YU Hong-Wei , WU Hai-Cheng , WEI Yi-Xiang . Measurement of neutron cross sections and resonance parameters of ¹⁶⁹Tmbelow 100 eV. Chinese Physics C, 2010, 34(2): 177-181. doi: 10.1088/1674-1137/34/2/004
[15]	WANG Wen-Xin , ZHANG Yi , WANG Ji-Jin , HU Bi-Tao . Study on spatial resolution of micromegas as a neutron detector under condition of high neutron flux and γ ray background. Chinese Physics C, 2009, 33(2): 110-113. doi: 10.1088/1674-1137/33/2/007
[16]	QIAN Sen , WANG Yi-Fang , ZHANG Jia-Wen , LI Jin , CHEN Yuan-Bo , CHEN Jin , WANG Zhi-Gang , MA Lie-Hua . Study of the RPC-Gd as thermal neutron detector. Chinese Physics C, 2009, 33(9): 769-773. doi: 10.1088/1674-1137/33/9/011
[17]	WANG Song-Lin , HUANG Han-Xiong , RUAN Xi-Chao , LI Xia , BAO Jie , NIE Yang-Bo , ZHONG Qi-Ping , ZHOU Zu-Ying , KONG Xiang-Zhong . Measurement of the neutron spectrum of a Pu-C source with a liquid scintillator. Chinese Physics C, 2009, 33(5): 378-382. doi: 10.1088/1674-1137/33/5/012
[18]	LAN Chang-Lin , RUAN Xi-Chao , LIU Gang , ZHOU Zu-Ying , TANG Hong-Qing , KONG Xiang-Zhong . Development of a facility for research of charged particle emission induced by fast neutron reactions. Chinese Physics C, 2008, 32(S2): 183-185.
[19]	LIU Ting-Jin , SUN Zheng-Jun , SHU Neng-Chuan . Systematics on fission fragment mass distribution of neutron induced 235U fission. Chinese Physics C, 2008, 32(7): 556-560. doi: 10.1088/1674-1137/32/7/009
[20]	Yang Weifan , Yuan Shuanggui , Mou Wantong , Zhang Xueqian , Li Zongwei , Yu Xian , Gan Zaiguo , Liu Hongye , Guo Yingxiang , Zhao Jinhua , Lei Xiangguo , Guo Junsheng , Du Yifei , Zhao Lili , Zhang Xiang . A New Heavy Neutron-Rich Isotope ²³⁹Pa. Chinese Physics C, 1995, 19(S3): 221-222.

Access

Get Citation

ZENG Li-Na, WANG Qiang, SONG Ling-Li and ZHENG Chun. Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber[J]. Chinese Physics C, 2015, 39(1): 016001. doi: 10.1088/1674-1137/39/1/016001

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2014-02-25
Revised: 1900-01-01

Article Metric

Article Views(1757)
PDF Downloads(219)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber

Corresponding author: ZHENG Chun,

Received Date: 2014-02-25

Accepted Date: 1900-01-01

Available Online: 2015-01-05

Abstract: The ²³⁹Pu fission chambers are widely used to measure fission spectrum neutron flux due to a flat response to fast neutrons. However, in the meantime the resonance and thermal neutrons can cause a significant influence on the measurement if they are moderated, which could be eliminated by using ¹⁰B and Cd covers. At a column enriched uranium fast neutron critical assembly, the fission reaction rates of ²³⁹Pu are measured as 1.791× 10^-16, 2.350×10^-16 and 1.385× 10^-15 per second for 15 mm thick ¹⁰B cover, 0.5 mm thick Cd cover, and no cover respectively, while the fission reaction rate of ²³⁹Pu is rapidly increased to 2.569× 10^-14 for a 20 mm thick polythene covering fission chamber. The average ²³⁹Pu fission cross-section of thermal and resonance neutrons is calculated to be 500 b and 24.95 b with the assumption of 1/v and 1/E spectra respectively, then thermal, resonance and fast neutron flux are achieved to be 2.30× 10⁶, 2.24× 10⁶ and 1.04× 10⁸ cm^-2·^-1.

HTML

Reference (1)

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber

Corresponding author: ZHENG Chun,

HTML

目录

Influence of thermal and resonance neutron on fast neutron flux measurement by 239Pu fission chamber

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Influence of thermal and resonance neutron on fast neutron flux measurement by 239Pu fission chamber

Corresponding author: ZHENG Chun,

HTML

目录

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber

Influence of thermal and resonance neutron on fast neutron flux measurement by ²³⁹Pu fission chamber