Experiences with the Ge(Li) detector for high-resolution gamma ray spectrometry and a practical approach to the pulse pileup problem

Anders, O.U.

doi:10.1016/0029-554x(69)90220-1

Cited by 100 publications

(16 citation statements)

References 3 publications

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“…The DMP method is basically different from those methods relying on mixing electronic and detector pulses, the source-generator method (SGM) [6] and the pulser method [1,2,[8][9][10]. The DMP method is based on a time correlation between the pulses from the detector and those from the pulse generator, providing a way to measure directly the effective dead time of the counting system.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In another approach, the correction is obtained by inserting an electronic unit with a fixed dead time in the analogue or digital part of the signal chain, with a dead time longer than the dead time of any other unit of the chain [5][6][7]. One other technique is known as the pulser method and uses pulses from an electronic pulse generator, with known frequency, to mix them with detector pulses [1,2,[8][9][10]. Additional procedures to deal with dead time problems involve the detection of pile-up pulses with electronic PUR circuits (Pile-Up Rejectors) [1,11,12], or their correction using digital-processing techniques [13].…”

Section: Introductionmentioning

confidence: 99%

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Method for effective dead time measurement in counting systems

Vinagre

Conde

2001

Nuclear Instruments and Methods in Physics Research Section A:

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The counting losses introduced by the dead time of a counting system are a limiting factor in counting measurements. The purpose of this work is to report an efficient method for the measurement of the effective dead time of a counting system and to characterize its dead time behavior, providing a way to investigate each experimental situation. The method, which we designate as Delayed and Mixed Pulses method, is based on the artificial piling-up of detector pulses with electronic pulses delayed by a specific time interval. It is applicable to the measurement of the effective dead time of a counting system, including both pileup effects and the dead time characteristics of the elements of the counting chain. With counting systems relying on gaseous radiation detectors, we achieved a standard uncertainty of about 5-10% in the dead times measured.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method for effective dead time measurement in counting systems

Vinagre

Conde

2001

Nuclear Instruments and Methods in Physics Research Section A:

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“…Anders and al. proposed the use of "Leaky discriminators" for multichannel analyzers to permit effective usage of two-pulser spectrum stabilization [7]. Pommé and al.…”

Section: Introductionmentioning

confidence: 99%

Adaptive filtering of the preamplifier's output signals of a gamma spectrometry chain

Badri¹,

Hamzaoui²,

Laraki³

et al. 2013

astp

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Gamma spectrometry is a technique used for measuring the quantitative and qualitative determination of radioisotopes emitting gamma radiation. Each element of the electronic measurement chain has its own limitations, and therefore may introduce noise in the recorded signal and thus make it difficult to interpret. In particular, the noisy and random nature of the output signal of the preamplifier, and the pileup phenomenon remain major problems in the field of gamma spectrometry signal processing. For a better use of spectrometric signals, we propose in this work a method for adaptive filtering of the preamplifier output signal based on least mean-square algorithm (LMS). This choice is justified because of the simplicity and relevance of this method which is widely used in similar applications. The use of high performance data acquisition card and the implementation of this method on digital signal processor (DSP) allow real time processing of the recorded signals. Various tests were performed using different signals as reference input of the filter, both in the presence and absence of a gamma radiation source. Preliminary results show a significant improvement of the signal to noise ratio (SNR), especially when the reference input is chosen to be the recorded background noise of the detector.

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“…This was originally proposed by STRAUSS et al 1 and ANDERS. 2 The obvious assumption is that the percentage of pulses lost from the pulser peaks is the same as the percentage of pulses lost from the regular gamma-peaks. However, there are difficulties and limitations in using pulsers.…”

Section: Introduction +mentioning

confidence: 99%

Performance testing of two dual-energy pulsers

Koskelo¹,

Woodward²,

Gehrke

et al. 1998

J Radioanal Nucl Chem

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The Idaho National Engineering Laboratory (INEL) has been developing a dual energy pulser for dead time and random summing corrections, and for the assessment of the quality of the data for many years. This effort now includes several revisions of the original concept. Recently, Canberra has developed a version of this dual energy pulser as part of a technology transfer from INEL to Canberra Industries. This new design includes many of the same characteristics as the original INEL design. In this paper, we will present the results of a series of tests performed at INEL with both the latest INEL pulser design and the Canberra design. These test results include measurement results of pulser peak width, energy equivalence and dead time and random summing correction capability as a function of count rate and temperature. It is demonstrated that both designs perform comparably with count rate and temperature when operated over a limited temperature range. In applications where extreme temperature variations are likely during the measurements, the INEL design is the better choice.

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Experiences with the Ge(Li) detector for high-resolution gamma ray spectrometry and a practical approach to the pulse pileup problem

Cited by 100 publications

References 3 publications

Method for effective dead time measurement in counting systems

Method for effective dead time measurement in counting systems

Adaptive filtering of the preamplifier's output signals of a gamma spectrometry chain

Performance testing of two dual-energy pulsers

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