Algorithms for the analysis of -decay total absorption spectra

Taín, J. L.; Cano‐Ott, D.

doi:10.1016/j.nima.2006.10.098

Cited by 93 publications

(98 citation statements)

References 23 publications

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“…The yellow line represents the contribution of the pile-up signals to the data. The red line is the result of the reconstruction of the TAGS data with the feeding found with the Bayes method [26]. It is already in very good agreement with the data shown in black.…”

Section: Results From Experiments At Jyväskyläsupporting

confidence: 63%

“…It is also a candidate Pandemonium nucleus, and its ground state to ground state beta branch is a first forbidden non unique transition with a large branching ratio. The reconstructed spectrum obtained after cleaning of the data from daughter contamination and pile-up events, and so solving the inverse problem with the method developed in [26] is shown in the upper panel of Fig. 1 in blue, superposed on the data (black line).…”

Section: Results From Experiments At Jyväskylämentioning

confidence: 99%

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Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra

et al. 2017

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Abstract. The accurate determination of reactor antineutrino spectra remains a very active research topic for which new methods of study have emerged in recent years. Indeed, following the long-recognized reactor anomaly (measured antineutrino deficit in short baseline reactor experiments when compared with spectral predictions), the three international reactor neutrino experiments Double Chooz, Daya Bay and Reno have recently demonstrated the existence of spectral distortions in their measurements with respect to the same predictions. These spectral predictions were obtained through the conversion of integral beta-energy spectra obtained at the ILL research reactor. Several studies have shown that the underlying nuclear physics required for the conversion of these spectra into antineutrino spectra is not totally understood. An alternative to such converted spectra is a complementary approach that consists of determining the antineutrino spectrum by means of the measurement and processing of nuclear data. The beta properties of some key fission products suffer from the pandemonium effect which can be circumvented by the use of the Total Absorption Gammaray Spectroscopy technique (TAGS). The two main contributors to the Pressurized Water Reactor antineutrino spectrum in the region where the spectral distortion has been observed are 92 Rb and 142 Cs, which have been measured at the radioactive beam facility of the University of Jyväskylä in two TAGS experiments. We present the results of the analysis of the TAGS measurements of the β-decay properties of 92 Rb along with preliminary results on 142 Cs and report on the measurements already performed.

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Section: Results From Experiments At Jyväskyläsupporting

confidence: 63%

Section: Results From Experiments At Jyväskylämentioning

confidence: 99%

Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra

et al. 2017

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“…In order to determine a β-intensity distribution from the measured spectrum, a de-convolution has to be done with the spectrometer response to the decay [13]. For this purpose we have to solve the inverse problem represented by:…”

Section: Detector Performancementioning

confidence: 99%

First experiment with the NUSTAR/FAIR Decay Total Absorption γ-Ray Spectrometer (DTAS) at the IGISOL IV facility

Guadilla

Algora

Taín

et al. 2016

Nuclear Instruments and Methods in Physics Research Section B:

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The new Decay Total Absorption Spectrometer (DTAS) has been commissioned with low energy radioactive beams at the upgraded IGISOL IV facility. The DTAS is a segmented detector composed of up to 18 NaI(Tl) crystals and it will be a key instrument in the DESPEC experiment at FAIR. In this document we report on the experimental setup and the first measurements performed with DTAS at IGISOL. The detector was characterized by means of MC simulations, and this allowed us to calculate the response function of the spectrometer and analyse the first cases of interest.

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“…The response matrix is obtained by using a GEANT4 simulation of the detector which is previously validated using measured known sources. To solve the inverse problem, we use an Expectation Maximization algorithm based on Bayes theorem and combined with a 2 minimisation [12]. One can appreciate the use of this process on the analysis of 92 Rb measured data in Figure 2, where the blue curve is the reconstructed spectrum and the black one the experimental one.…”

Section: First Resultsmentioning

confidence: 99%

Measurement of fission productsβdecay properties using a total absorption spectrometer

Zakari-Issoufou

Porta

Fallot

et al. 2013

EPJ Web of Conferences

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Abstract. In a nuclear reactor, the decay of fission fragments is at the origin of decay heat and antineutrino flux. These quantities are not well known while they are very important for reactor safety and for our understanding of neutrino physics. One reason for the discrepancies observed in the estimation of the decay heat and antineutrinos flux coming from reactors could be linked with the Pandemonium effect. New measurements have been performed at the JYFL facility of Jyväskylä with a Total Absorption Spectrometer (TAS) in order to circumvent this effect. An overview of the TAS technique and first results from the 2009 measurement campaign will be presented.

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Algorithms for the analysis of -decay total absorption spectra

Cited by 93 publications

References 23 publications

Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra

Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra

First experiment with the NUSTAR/FAIR Decay Total Absorption γ-Ray Spectrometer (DTAS) at the IGISOL IV facility

Measurement of fission productsβdecay properties using a total absorption spectrometer

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