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Implementation of a cusp-like for real-time digital pulse shaper in nuclear spectrometry

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Abstract

Pulse sha**, which improves signal-to-noise ratio excellently, has been extensively used in nuclear signal processing. This paper presents a cusp-like pulse-sha** technique developed through the recursive difference equation in time domain. It can be implemented in field programmable gate array hardware system. Another flat-topped cusp-like shaper is developed to optimize the time constant of pulse sha** and reduce the influence of ballistic deficit. The methods of both baseline restoration and pile-up rejection are described. The 137Cs energy spectra measured with the digital cusp-like shaper are 6.6% energy resolution, while those by traditional analog pulse shaper are 7.2% energy resolution, under the same conditions. This technique offers flexibility, too, in adjusting the pulse shaper parameters.

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Authors and Affiliations

  1. Chengdu University of Technology, Chengdu, 610059, China

    Jun Liu, Jian Yang, Guo-Qiang Zeng, Kai-Qi Zhang, Shi-Long Wei & Liang-Quan Ge

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  1. Jun Liu
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  2. Jian Yang
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  3. Guo-Qiang Zeng
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  4. Kai-Qi Zhang
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  5. Shi-Long Wei
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  6. Liang-Quan Ge
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Corresponding author

Correspondence to Guo-Qiang Zeng.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 41474159 and 41504139), Sichuan Youth Science and Technology Foundation (No. 2015JQ0035), Sichuan Science and Technology Support Program (No. 2017GZ0390) and the Key Laboratory of Applied Nuclear Techniques in Geosciences Sichuan (No. gnzds2014006).

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Liu, J., Yang, J., Zeng, GQ. et al. Implementation of a cusp-like for real-time digital pulse shaper in nuclear spectrometry. NUCL SCI TECH 28, 103 (2017). https://doi.org/10.1007/s41365-017-0248-1

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