Topic
Pulse height analyzer
About: Pulse height analyzer is a research topic. Over the lifetime, 427 publications have been published within this topic receiving 3684 citations.
Papers published on a yearly basis
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Papers
Patent•
1 Jun 2001TL;DR: In this paper, the authors proposed a multivariate spectral analysis method for determining the properties of a sample from measured spectral data collected from the sample by performing a method of multivariate spectrum analysis.
Abstract: An apparatus and system for determining the properties of a sample from measured spectral data collected from the sample by performing a method of multivariate spectral analysis. The method can include: generating a two-dimensional matrix A containing measured spectral data; providing a weighted spectral data matrix D by performing a weighting operation on matrix A; factoring D into the product of two matrices, C and ST, by performing a constrained alternating least-squares analysis of D=CST, where C is a concentration intensity matrix and S is a spectral shapes matrix; unweighting C and S by applying the inverse of the weighting used previously; and determining the properties of the sample by inspecting C and S. This method can be used by a spectrum analyzer to process X-ray spectral data generated by a spectral analysis system that can include a Scanning Electron Microscope (SEM) with an Energy Dispersive Detector and Pulse Height Analyzer.
113 citations
TL;DR: In this article, a virtual pulse generator was proposed for real-time correction of counting losses in nuclear pulse spectroscopy, which obviates the shortcomings of the classical method simply by not introducing pulses into the spectroscopic system.
Abstract: Reviewing the current status of real-time correction of counting losses in nuclear pulse spectroscopy, the pileup problem is identified as the last question not resolved satisfactorily up to now. Correction of pileup losses in provided, at least in principle, by the classical pulse generator method, however, severe limitations in test frequency prohibit its application to real-time correction of counting losses. A solution is offered by the novel principle of the virtual pulse generator which obviates the shortcomings of the classical method simply by not introducing pulses into the spectroscopy system. Instead, the probability for pileup-free pulse processing is determined by suitable tests of the system status at arbitrarily high test frequencies. After a discussion of the principles of the new method and its application to a real-time correction system experimental evidence is provided for the complete correction of counting losses of more than 98% under conditions of stationary as well as variable counting rates up to the limit of stable operation of the underlying spectroscopy system which is 800 000 c/s for an experimental high-rate gamma spectrometer.
99 citations
TL;DR: DNA histograms of rat thymocytes stained with ethidium bromide and mithramycin demonstrate that all angles of incidence can be used, and it is concluded that instrumental resolution is equal to or better than CV = 0.9%.
84 citations
TL;DR: In this article, an apparatus for high speed measurements of small-angle X-ray scattering (SAXS) is described, which utilizes a 12 kW rotating anode Xray generator, a linear position sensitive proportional counter (multicathode delay line PSPC), and a two-parameter multichannel pulse height analyzer (MCA) with 12 kwords (16 bits/word) memory area available for SAXS intensity data as a function of position (scattering angles) and time slice.
Abstract: An apparatus for high speed measurements of small-angle X-ray scattering (SAXS) is described. This apparatus utilizes a 12 kW rotating anode X-ray generator, a linear position sensitive proportional counter (multicathode delay line PSPC), and a two-parameter multichannel pulse height analyzer (MCA) with 12 kwords (16 bits/word) memory area available for SAXS intensity data as a function of position (scattering angles) and time slice. The two-parameter MCA is constructed within a microcomputer system, by utilizing its R/W memory for data storage, and the memory incrementing and real-time CRT display is implemented by using two direct memory access (DMA) controllers. The cycle time of the access is about 10 μs. The measuring time for SAXS profiles with this apparatus can be shortened approximately by three orders of magnitude in comparison with the measuring time with SAXS apparatuses utilizing a conventional step-scanning goniometer and a conventional X-ray tube, thus permitting time-resolved analyses of SAXS profiles. Some applications of the apparatus to dynamic SAXS measurements are presented for polymeric systems, the preliminary results of which seem to indicate the possibility of obtaining a new class of data on dynamics in structural transformation, deformation, formation and annihilation in the scale of a few tens to several hundred Angstroms.
72 citations
TL;DR: The moon probe Ranger 3 carried as one of its scientific packages an instrument designed to measure the interplanetary gamma-ray flux as mentioned in this paper, which consisted of a detector, a 32-channel pulse height analyzer, and a high-voltage power supply.
Abstract: The moon probe Ranger 3 carried as one of its scientific packages an instrument designed to measure the interplanetary gamma -ray flux. Data for more than 40 hours of operation are given and some conclusions which can be drawn concerning gamma -ray astronomy are presented. The instrument consisted of a detector, a 32-channel pulse height analyzer, and a high-voltage power supply. (W.D.M.)
68 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 3 |
| 2019 | 1 |
| 2018 | 4 |
| 2017 | 1 |
| 2016 | 2 |