High-resolution boosted reconstruction of γ-ray spectra

doi:10.13538/j.1001-8042/nst.25.050202

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (5): 050202 doi: 10.13538/j.1001-8042/nst.25.050202

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles Next Articles

High-resolution boosted reconstruction of γ-ray spectra

LI Lei,^{1, 2} TUO Xian-Guo,^{1, 3} LIU Ming-Zhe,^{1, 2} WANG Jun ^{1, 2}

¹State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
²Nuclear Technology and Automation Engineering Institute, Chengdu University of Technology, Chengdu 610059, China
³Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang 621010, China

Contact: TUO Xian-Guo
Supported by:
Supported by National Science Foundation for Distinguished Young Scholars (No. 41025015), Natural Science Foundation of China (No. 41274130), Sichuan Youth Science and Technology Innovation Team (No. 2011JTD0013), and Sichuan Province Science and Technology Support Plan (No. 2013FZ0022)

Export Citation

LI Lei, TUO Xian-Guo, LIU Ming-Zhe, WANG Jun . High-resolution boosted reconstruction of γ-ray spectra.Nuclear Science and Techniques, 2014, 25(5): 050202 doi: 10.13538/j.1001-8042/nst.25.050202

Abstract

Abstract:

Direct demodulation method (DDM) was applied to reconstruct -ray spectra. Boosted Richardson-Lucy iteration was introduced into DDM. Monte Carlo method (here GEANT 4) was proposed to calibrate response function and establish response matrix. First, gauss function was regarded as total energy peak. Spectra line was simulated with nine gauss functions. And afterwards DDM was applied to reconstruct the simulated spectra line and determined peak positions and areas. Compared with original spectra, for case that peak position interval was about 1/3 full width half maximum (FWHM), the error of rebuilding peak position was 2 channels. The rest of peaks could be searched accurately. The relative errors of all peaks’ area were less than 4%. Then, three key factors, including noise, background, response matrix, were discussed. Finally, DDM was applied to calibrate the field NaI gamma spectrometer. The errors of U, Th, K were less than 5%. Comprehensive studies have shown that it is feasible to reconstruct gamma-ray spectra with DDM. DDM can significantly pseudo-improve energy resolution of gamma spectrometer, effectively decompose doublets whose peak potential interval is 1/3 FHWM, and accurately search peak and calculate areas. DDM can restrain noise strongly but is greatly influenced by background. And DDM can improve the accuracy of qualitative and quantitative analysis in combination with the conventional spectrum analysis method.

Key words: Direct Demodulation Method (DDM), Monte Carlo, GEANT4, Reconstruction, Doublets

References

[1] Pang J F. Gamma-ray spectrum analysis. Xi’an (CHN): Shanxi Science and Technology Press, 1993, 577–608. (in Chinese)
[2] Pang J F, Zheng G F, Hou X F. Atom Energy Sci Technol,1987, 21: 270–279. (in Chinese)
[3] Pang J F. Gamma-ray spectrum analysis. Xi’an (CHN): Shanxi Science and Technology Press, 1993, 365–402. (in Chinese)
[4] Kokta L. Nucl Instrum Methods,1973, 112: 245–251.
[5] Li Z, Tuo X G, Shi R, et al. Nucl Sci Tech, 2013, 24: 060206.
[6] Morhac M, Kliman J, Matousek V, et al. Nucl Instrum Meth A,1997, 401: 385–408.
[7] Kong Y and Lynn K G. Nucl Instrum Meth A, 1991, 302: 145–149.
[8] Tikhonov A N and Arsenin V Y. Solutions of Ill-posed problems.
In: Fritz John, editor. Wiley, New York (USA): Winston distributed solely by Halsted Press, 1977, 52–80.
[9] Morhac M and Matousek V. J Comput Appl Math, 2011, 235:1629–1640.
[10] Scofield N E. A Technique for Unfolding Gamma-Ray Scintillation Spectrometer Pulse-Height Distributions. Naval Radiological Defense Laborator USA, USNRDL-TR-447, 1960.
[11] Vetter W J. Siam Rev, 1973, 15: 352–369.
[12] Gold R. An Iterative Unfolding Method for Response Matrices. Argonne National Laboratories, Argonne, ANL-6984,1964.
[13] Lucy L B. Astron J, 1974, 79: 745–754.
[14] Olofsson T and Stepinski T. Ultrasonics,1999, 37: 423–432.
[15] Li T P and Wu M. Astrophys Space Sci, 1993, 206: 91–102.
[16] Li T P and Wu M. Astrophys Space Sci, 1994, 215: 213–227.
[17] Lu F J, Li T P, Sun X J, et al. Astron Astrophys Suppl, 1996,
115: 395–400. (in Chinese)
[18] Li T P. Exp Astron, 1995, 6: 63–69.
[19] Li T B and Wu M. Chinese Astron Astr, 1993, 17: 453–463.
[20] Shen Z J. Ph. D. Thesis, Tsinghua University, 2007. (in Chinese)
[21] Ai X Y. PH. D. Thesis, Tsinghua University, 2005. (in Chinese)
[22] Yue K, Liang J, Sun Z, et al. Nucl Phys Rev, 2010, 27: 436–439. (in Chinese)
[23] Yang J B, Yang Y G, Li Y J, et al. Nucl Sci Tech, 2012, 23: 337–343.
[24] Agostinelli S, Allison J, Amako K, et al. Nucl Instrum Meth A, 2003, 506: 250–303.
[25] Liu Q C, Jia B S, Wan J. Introduction to Nuclear Science. Heilongjiang(CHN): Harbin Engineering University Press, 2004,
79–81. (in Chinese)
[26] Morhac M. Nucl Instrum Meth A, 2009, 600: 478–487.

Nuclear Science and Techniques

High-resolution boosted reconstruction of γ-ray spectra

Abstract

References

Related Articles 7

Metrics

Comments

10

[1]	Hong-Hu Song, Yong-Gang Yuan, Tai-Ping Peng, Yang Yang, Yong-Gang Mo, Jing Wu. Optimization study on neutron spectrum unfolding based on the least-squares method [J]. Nuclear Science and Techniques, 2018, 29(8): 118-118.
[2]	E. E. Ermis, F. B. Pilicer, E. Pilicer, C. Celiktas. A comprehensive study for mass attenuation coefficients of different parts of the human body through Monte Carlo methods [J]. Nuclear Science and Techniques, 2016, 27(3): 54-54.
[3]	Omrane Kadri, Mohammed Ali Alnafea, and Khaled Shamma. Computation and parameterization of normalized glandular dose using Geant4 [J]. Nuclear Science and Techniques, 2015, 26(3): 30303-030303.
[4]	YU Guo-Liang, DONG Lian-Jie, LONG Hou, LU Han-Lin, TANG Hong-Qin . A novel 4π Gd-loaded liquid scintillator detection system [J]. Nuclear Science and Techniques, 2014, 25(5): 50401-050401.
[5]	ZHAO Kai, CHENG Meng-Yun, LONG Peng-Cheng, FAN Yan-Chang, WANG Wen, HU Li-Qin, WU Yi-Can. A hybrid voxel sampling method for constructing Rad-HUMAN phantom [J]. Nuclear Science and Techniques, 2014, 25(2): 20503-020503.
[6]	JIANG Xiaofei, CHEN Chao, CAO Jing, CAO Hongrui. Simulation and calibration of the response function of multi-sphere neutron spectrometer [J]. Nuclear Science and Techniques, 2013, 24(6): 60406-060406.
[7]	Boubaker ASKRI, Adel TRABELSI, Brahim BACCARI. Method for converting in-situ gamma ray spectra of a portable Ge detector to an incident photon flux energy distribution based on Monte Carlo simulation [J]. Nuclear Science and Techniques, 2008, 19(6): 358-358-364.