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Quick algorithms for real-time discrimination of neutrons and gamma rays.

Amiri M, Přenosil V, Cvachovec F, Matěj Z, Mravec F - J Radioanal Nucl Chem (2014)

Bottom Line: Several new methods for the digital discrimination of neutrons and gamma-rays in a mixed radiation field are presented.The methods introduced discriminate neutrons and gamma rays successfully in the digital domain.They are mathematically simple and exploit samples during the life time of the pulse, hence appropriate for field measurements.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Informatics, Masaryk University, Brno, Czech Republic.

ABSTRACT

Several new methods for the digital discrimination of neutrons and gamma-rays in a mixed radiation field are presented. The methods introduced discriminate neutrons and gamma rays successfully in the digital domain. They are mathematically simple and exploit samples during the life time of the pulse, hence appropriate for field measurements. All these methods are applied to a set of mixed neutron and photon signals from a stilbene scintillator and their discrimination qualities are compared.

No MeSH data available.


Related in: MedlinePlus

Discrimination of photon and neutron signals using variable window. The pulses were obtained using DC440 digitizer (12-bit resolution, 420 MS/s)
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Fig24: Discrimination of photon and neutron signals using variable window. The pulses were obtained using DC440 digitizer (12-bit resolution, 420 MS/s)

Mentions: The double-sided amplitude spectra of neutron and gamma-ray signals in Fig. 22 are shown in Fig. 23; zero frequency can easily discriminate the two signal types. Figure 24 illustrates the experimental distribution plot of neutrons and photons for the data obtained from DC440 digitizer with 12-bit resolution and set at 420 MS/s frequency rate. As seen, the zero discrimination value is the separator here; neutrons have positive and gamma-rays have negative discrimination values. Table 17 shows the FoM (computed using Eq.  1) and neutron and photon counts for this data set. The discrimination quality is improved in this method compared to the application of FFT method, explained in Sect. 6.2. FoMs and pulse counts for the other data sets with different resolutions and frequency rates are shown in Table 18. While FFT method, explained previously, failed to discriminate low-resolution data, this method discriminates these pulses very efficiently.Fig. 23


Quick algorithms for real-time discrimination of neutrons and gamma rays.

Amiri M, Přenosil V, Cvachovec F, Matěj Z, Mravec F - J Radioanal Nucl Chem (2014)

Discrimination of photon and neutron signals using variable window. The pulses were obtained using DC440 digitizer (12-bit resolution, 420 MS/s)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514667&req=5

Fig24: Discrimination of photon and neutron signals using variable window. The pulses were obtained using DC440 digitizer (12-bit resolution, 420 MS/s)
Mentions: The double-sided amplitude spectra of neutron and gamma-ray signals in Fig. 22 are shown in Fig. 23; zero frequency can easily discriminate the two signal types. Figure 24 illustrates the experimental distribution plot of neutrons and photons for the data obtained from DC440 digitizer with 12-bit resolution and set at 420 MS/s frequency rate. As seen, the zero discrimination value is the separator here; neutrons have positive and gamma-rays have negative discrimination values. Table 17 shows the FoM (computed using Eq.  1) and neutron and photon counts for this data set. The discrimination quality is improved in this method compared to the application of FFT method, explained in Sect. 6.2. FoMs and pulse counts for the other data sets with different resolutions and frequency rates are shown in Table 18. While FFT method, explained previously, failed to discriminate low-resolution data, this method discriminates these pulses very efficiently.Fig. 23

Bottom Line: Several new methods for the digital discrimination of neutrons and gamma-rays in a mixed radiation field are presented.The methods introduced discriminate neutrons and gamma rays successfully in the digital domain.They are mathematically simple and exploit samples during the life time of the pulse, hence appropriate for field measurements.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Informatics, Masaryk University, Brno, Czech Republic.

ABSTRACT

Several new methods for the digital discrimination of neutrons and gamma-rays in a mixed radiation field are presented. The methods introduced discriminate neutrons and gamma rays successfully in the digital domain. They are mathematically simple and exploit samples during the life time of the pulse, hence appropriate for field measurements. All these methods are applied to a set of mixed neutron and photon signals from a stilbene scintillator and their discrimination qualities are compared.

No MeSH data available.


Related in: MedlinePlus