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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.


Application of “Angle-Based” method (vertical difference) to smoothed neutron and photon pulses
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Fig13: Application of “Angle-Based” method (vertical difference) to smoothed neutron and photon pulses

Mentions: The preceding angle-based technique can also be employed to discriminate based on the difference between the energy levels of the two pulse types at some fixed point within their rise times. To implement this method, as shown in Fig. 13, the crossing of the 5 % level and the leading edge of the curve is marked and then shifted forward a constant amount to be the vertex of an angle with one arm pointing to the crossing of a perpendicular line to the x-axis (occurring a constant time after a specified level on the leading edge) and the curve, and the other arm directing downward perpendicular to the x-axis. The y-axis of the curve should be scaled properly to provide us with quality discrimination. Because this method works on the energy level of the pulses, the discrimination is much better for the data obtained using a digitizer with a high resolution, as Table 14 proves this.Fig. 13


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)

Application of “Angle-Based” method (vertical difference) to smoothed neutron and photon pulses
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig13: Application of “Angle-Based” method (vertical difference) to smoothed neutron and photon pulses
Mentions: The preceding angle-based technique can also be employed to discriminate based on the difference between the energy levels of the two pulse types at some fixed point within their rise times. To implement this method, as shown in Fig. 13, the crossing of the 5 % level and the leading edge of the curve is marked and then shifted forward a constant amount to be the vertex of an angle with one arm pointing to the crossing of a perpendicular line to the x-axis (occurring a constant time after a specified level on the leading edge) and the curve, and the other arm directing downward perpendicular to the x-axis. The y-axis of the curve should be scaled properly to provide us with quality discrimination. Because this method works on the energy level of the pulses, the discrimination is much better for the data obtained using a digitizer with a high resolution, as Table 14 proves this.Fig. 13

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.