A Comparison of Two Discrimination Spectrometers

In order to obtain a neat gamma spectrum, two spectrometers were examined for thediscrimination of the low-energy part of the 137Cs gamma-ray spectrum which has electronicnoise. Pulse shape discrimination (PSD) time measurement (timing) method was used for thispurpose. This method, briefly, depends on the rise time measurement process of the signals.While implementing the process, a constant fraction discriminator (CFD) and a pulse shapeanalyzer (PSA) devices were used separately. Obtained spectra from the spectrometers werecompared with each other. To perform an exact comparison, partial and complete discriminationprocesses were realized. After the comparison, it was concluded that the discrimination processthrough the spectrometer with PSA device was more successful than that of the other one. Itwas suggested that the PSD method using the PSA device would give a clearer gammaspectrum when accumulating it by a NaI(Tl) scintillation detector.

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[1] Maas, A.J.H., Klein, S.S., Simons, D.P.L., de Voigt, M.J.A. (1996). Recoil selection by pulse shape discrimination in elastic recoil detection analysis with α-particles. Nuclear Instruments and Methods in Physics Research B, 118(1-4), 268-273.
[2] Leo, W.R. (1994). Techniques for Nuclear and Particle Physics Experiment, Springer-Verlag, Berlin.
[3] Al-Haddad, M.N., Lin, C., Miller, W.H., Berliner, R.R. (1994). Development and testing of a flash analog-to-digital converter based system for pulse shape discrimination of nuclear radiation pulses. IEEE Transactions on Nuclear Science, 41(5), 1765-1769.
[4] Heistek, L.J., Zwan, L. van der, (1970). Pulse shape discrimination with a comparator circuit. Nuclear Instruments and Methods in Physics Research, 80(2), 213-216.
[5] Alexander, T.K., Goulding, F.S. (1961). An amplitude-insensitive system that distinguishes pulses of different shapes. Nuclear Instruments and Methods in Physics Research, 13, 244-246.
[6] Knoll, G.F. (2010). Radiation Detection and Measurement, Wiley, New York.
[7] Ruch, M.L., Flaska, M., Pozzi, S.A. (2015). Pulse shape discrimination performance of stilbene coupled to low-noise silicon photomultipliers. Nuclear Instruments and Methods in Physics Research A, 793, 1-5.
[8] Yanagida, T., Watanabe, K., Okada, G., Kawaguchi, N. (2019). Neutron and gamma-ray pulse shape discrimination of LiAlO2 and LiGaO2. Nuclear Instruments and Methods in Physics Research A, 919, 64-67.
[9] Doucet, E., Brown, T., Chowdhury, P., Lister, C.J., Morse, C., Bender, P.C., Rogers, A.M. (2020). Machine learning n/γ discrimination in CLYC scintillators. Nuclear Instruments and Methods in Physics Research A, 954, 161201.
[10] Senoville, M., Delaunay, F., Parlog, M., Achouri, N.L., Orr, N.A. (2020). Neutron-γ discrimination with organic scintillators: Intrinsic pulse shape and light yield contributions. Nuclear Instruments and Methods in Physics Research A, 971, 164080.
[11] Recker, M.C., Cazalas, E.J., McClory, J.W. (2020). Pulse shape discrimination with a low-cost digitizer using commercial off-the-shelf components. Nuclear Instruments and Methods in Physics Research A, 954, 161479.
[12] Sugiyama, Y., Ahn, J.K., Banno, S., Beckford, B., Campbell, M., Chen, S.H., Comfort, J., Duh, Y.T., Hineno, T., Hsiung, Y.B., Hutcheson, M., Iwai, E., Kamiji, I., Kawasaki, N., Kim, E.J., Kim, J.L., Kim, Y.J., Ko, J.W., Komatsubara, T.K., Kurilin, A.S., Lee, J.W., Lee, S.K., Lim, G.Y., Lin, C., Lin, Q., Luo, Y., Ma, J., Maeda, Y., Masuda, T., Matsumura, T., Mcfarland, D., Murayama, R., Naito, D., Nakagiri, K., Nakaya, Y., Nanjo, H., Nomura, T., Odani, Y., Redeker, J.C., Ri, Y.D., Sasao, N., Sato, K., Seki, S., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Su, S., Suzuki, S., Tajima, Y., Takahashi, G., Takashima, Y., Tecchio, M., Togawa, M., Tung, Y.C., Wah, Y.W., Watanabe, H., Whallon, N., Woo, J.K., Xu, J., Yamanaka, T., Yanagida, Y., Yoshida, H.Y., Yoshimoto, H. (2021). Pulse shape discrimination of photons and neutrons in the energy range of 0.1 – 2 GeV with the KOTO un-doped CsI calorimeter. Nuclear Instruments and Methods in Physics Research A, 987, 164825.
[13] Selvi, S., Celiktas, C. (2007). Compton suppression through rise-time analysis. Applied Radiation and Isotopes, 65, 1265-1268.