Uncertainty propagation in activation cross section measurements

Otuka, Naohiko; Lalremruata, B.; Khandaker, Mayeen Uddin; Usman, Ahmed; Punte, L. R. M.

doi:10.1016/j.radphyschem.2017.01.013

Cited by 96 publications

(35 citation statements)

References 26 publications

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“…An additional acquisition of each sample was also carried out about 2 months after the EOB, to further measure the activity of the long-lived 46 Sc. Data analysis, including uncertainty calculations, was performed for each spectrum by using the procedure described by Otuka et al [15], taking into account the nuclear data from the NuDat 2.2 database [16] ( Table 1). The final nat V(p,x) 47 Sc, 46 Sc cross section value related to each target foil was calculated as the weighted average of all single values associated to each counting.…”

Section: Experimental Descriptionmentioning

confidence: 99%

Production of 47Sc with natural vanadium targets: results of the PASTA project

Pupillo

Mou

Boschi

et al. 2019

J Radioanal Nucl Chem

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The goal of PASTA project (acronym for production with accelerator of 47 Sc for theranostic applications) is the determination of excitation functions associated to several nuclear reactions, aimed at yielding the theranostic radionuclide 47 Sc. This work reports the main results obtained by irradiating natural vanadium targets with proton beams up to 70 MeV. Particular care is also given to the co-production of 46 Sc, the only isotopic contaminant with half-life longer than 47 Sc. Experimental results are compared with theoretical studies by means of known nuclear reaction software tools that are publicly available.

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Section: Experimental Descriptionmentioning

confidence: 99%

Production of 47Sc with natural vanadium targets: results of the PASTA project

Pupillo

Mou

Boschi

et al. 2019

J Radioanal Nucl Chem

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“…Here m has value equal to total number of measured cross-sections for a particular nuclear reaction and has value equal to total number of attributes in the activation formula. Let us consider x j (j = 1,2,3....n), various variable parameters (which are mentioned above) required in the calculation of the cross-sections, then the covariance matrix (c x ) of these variables can be obtained from the following equation [32];…”

Section: B Covariance Analysismentioning

confidence: 99%

Measurement of alpha induced reaction cross-sections on $^{nat}$Mo with detailed covariance analysis

Choudhary,

Gandhi,

Sharma

et al. 2022

Preprint

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In the present study we have measured the excitation functions for the nuclear reactions 100 Mo(α,n) 103 Ru, nat Mo(α,x) 97 Ru, nat Mo(α,x) 95 Ru, nat Mo(α,x) 96g Tc, nat Mo(α,x) 95g Tc and nat Mo(α,x) 94g Tc in the energy range 11-32 MeV. We have used the stacked foil activation technique followed by off-line gamma ray spectroscopy technique to measure the excitation functions. In this study we have also documented detailed uncertainty analysis for these nuclear reactions and their corresponding covariance matrix are also presented. The excitation functions are compared with the available experimental data from EXFOR data library and the theoretical prediction from TALYS nuclear reaction code. The present measurements are found to be consistent with the available experimental data.

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“…The complete covariance matrix for measured cross sections is given by the following relation, (V σ s ) i j r e ir S i jr e jr 1 ≤ i, j ≤ 14, 1 ≤ r ≤ 20 (9) where S i jr is the n × n microcorrelation matrix between ith and jth observations due to the rth attributes, e ir is the partial uncertainty in ith observations due to the rth attributes and similarly for e jr [22]. The uncertainties of different parameters contribute to the total uncertainty of the measured cross section.…”

Section: Uncertainty In the Cross-section Measurementmentioning

confidence: 99%

Study of (n, 2n) reaction cross sections for 107Ag within the energy range of 9–22 MeV

Chauhan

Singh

et al. 2021

Eur. Phys. J. Plus

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The 107 Ag(n, 2n) 106m Ag reaction cross sections at the neutron energies of 10.50 ± 0.68, 13.52 ± 0.67, 16.86 ± 0.58 and 19.86 ± 0.59 MeV were measured by using the off-line γ-ray spectroscopy and activation analysis techniques. The 7 Li(p, n) reaction was used to produce the high-energy quasi-monoenergetic neutrons with the proton beam from the 14UD BARC-TIFR Pelletron facilities at Mumbai, India. The neutron flux was monitored using the standard 27 Al(n, α) 24 Na monitor reaction. The detailed uncertainties analysis in the measured cross sections was performed using the covariance analysis. The cross sections were also theoretically calculated using TALYS-1.9 code from 10 to 25 MeV energies. The measured cross-sections data are compared with the evaluated data from TENDL-2019, JENDL-4.0 and ENDF/B-VIII.0 libraries as well as with the existing experimental data available in EXFOR compilation. Our data show good agreement with some of the previous experimental data and with the theoretical values calculated with TALYS-1.9 code. Present work will provide better description of level density models and pre-equilibrium process.

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Uncertainty propagation in activation cross section measurements

Cited by 96 publications

References 26 publications

Production of 47Sc with natural vanadium targets: results of the PASTA project

Production of 47Sc with natural vanadium targets: results of the PASTA project

Measurement of alpha induced reaction cross-sections on $^{nat}$Mo with detailed covariance analysis

Study of (n, 2n) reaction cross sections for 107Ag within the energy range of 9–22 MeV

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