Decomposition of continuum γ-ray spectra using synthesized response matrix

Jändel, M.; Morháč, M.; Kliman, J.; Крупа, Л.; Matoušek, V.; Hamilton, J. H.; Ramayya, A. V.

doi:10.1016/j.nima.2003.07.047

Cited by 22 publications

(10 citation statements)

References 8 publications

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“…In response, the power function (i.e., y ¼ x a ða [ 0; x [ 0Þ, function is a monotonically increasing) was employed to alter the particular solution, which was found to provide good results. The analytical algorithm of this improved approach is discussed as follows [23]. First of all, set x ð0Þ ¼ 1, the value of L, the number of iterations S for which the process is to be repeated, and the process number index s = 1.…”

Section: The Improved Boosted Gold Decomposition Algorithmmentioning

confidence: 99%

An inversion decomposition method for better energy resolution of NaI(Tl) scintillation detectors based on a Gaussian response matrix

Yang

et al. 2016

NUCL SCI TECH

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NaI(Tl) scintillation detectors have been widely applied for gamma-ray spectrum measurements owing to advantages such as high detection efficiency and low price. However, the mitigation of the limited energy resolution of these detectors, which detracts from an accurate analysis of the instrument spectra obtained, remains a crucial need. Based on the physical properties and spectrum formation processes of NaI(Tl) scintillation detectors, the detector response to gamma photons with different energies is represented by photopeaks that are approximately Gaussian in shape with unique full-width-at-half-maximum (FWHM) values. The FWHM is established as a detector parameter based on resolution calibrations and is used in the construction of a general Gaussian response matrix, which is employed for the inverse decomposition of gamma spectra obtained from the detector. The Gold and Boosted Gold iterative algorithms are employed to accelerate the decomposition of the measured spectrum. Tests of the inverse decomposition method on multiple simulated overlapping peaks and on experimentally obtained U and Th radionuclide series spectra verify the practicability of the method, particularly in the low-energy region of the spectrum, providing for the accurate qualitative and quantitative analysis of radionuclides.

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Section: The Improved Boosted Gold Decomposition Algorithmmentioning

confidence: 99%

An inversion decomposition method for better energy resolution of NaI(Tl) scintillation detectors based on a Gaussian response matrix

Yang

et al. 2016

NUCL SCI TECH

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“…An alternative technique for quantitative analysis is unfolding, where a given profileŷ yðiÞ is decomposed into a set of component profiles according to (Jandel et al, 2004)…”

Section: The Unfolding Approachmentioning

confidence: 99%

RootProf: software for multivariate analysis of unidimensional profiles

Caliandro

Belviso

2014

J Appl Cryst

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RootProf is a multi-purpose program which implements multivariate analysis of unidimensional profiles. Series of measurements, performed on related samples or on the same sample by varying some external stimulus, are analysed to find trends in data, classify them and extract quantitative information. Qualitative analysis is performed by using principal component analysis or correlation analysis. In both cases the data set is projected in a latent variable space, where a clustering algorithm classifies data points. Group separation is quantified by statistical tools. Quantitative phase analysis of a series of profiles is implemented by whole-profile fitting or by an unfolding procedure, and relies on a variety of pre-processing methods. Supervised quantitative analysis can be applied, provided a priori information on some samples is provided. RootProf can be applied to measurements from different techniques, which can be combined by means of a covariance analysis. A specific analysis for powder diffraction data allows estimation of the average size of crystal domains. RootProf borrows its graphics and data analysis capabilities from the Root framework, developed for high-energy physics experiments.

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“…The decomposition method of Gold [4] is positive defined providing always positive solutions. It was successfully used for detector-response correction of γ-ray spectra measured with GAMMASPHERE [5]. In our application to the DANCE spectra we used a similar method [6] that including a regularization parameter to speed up the iteration procedure.…”

Section: Direct Decompositionmentioning

confidence: 99%

Detector-Response Correction of Two-Dimensionalγ-Ray Spectra from Neutron Capture

Rusev

Jändel

Arnold

et al. 2015

EPJ Web of Conferences

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Abstract. The neutron-capture reaction produces a large variety of γ-ray cascades with different γ-ray multiplicities. A measured spectral distribution of these cascades for each γ-ray multiplicity is of importance to applications and studies of γ-ray statistical properties. The DANCE array, a 4π ball of 160 BaF 2 detectors, is an ideal tool for measurement of neutron-capture γ-rays. The high granularity of DANCE enables measurements of high-multiplicity γ-ray cascades. The measured two-dimensional spectra (γ-ray energy,γ-ray multiplicity) have to be corrected for the DANCE detector response in order to compare them with predictions of the statistical model or use them in applications. The detector-response correction problem becomes more difficult for a 4π detection system than for a single detector. A trial and error approach and an iterative decomposition of γ-ray multiplets, have been successfully applied to the detector-response correction. Applications of the decomposition methods are discussed for two-dimensional γ-ray spectra measured at DANCE from γ-ray sources and from the 10 B(n, γ) and 113 Cd(n, γ) reactions.

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Decomposition of continuum γ-ray spectra using synthesized response matrix

Cited by 22 publications

References 8 publications

An inversion decomposition method for better energy resolution of NaI(Tl) scintillation detectors based on a Gaussian response matrix

An inversion decomposition method for better energy resolution of NaI(Tl) scintillation detectors based on a Gaussian response matrix

RootProf: software for multivariate analysis of unidimensional profiles

Detector-Response Correction of Two-Dimensionalγ-Ray Spectra from Neutron Capture

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