NIEL Doses are calculated for Si and GaAs using different reactor spectra with ASTM-E722 standards and are compared to currently available NJOY calculators in SR-NIEL—7 website. Following are the results obtained with NJOY 2021 (with ENDF/B.VIII.0) and NJOY 2016 (with ENDF/B.VII.1).
Analysis with NJOY 2021 (ENDF/B.VIII.0)
NIEL dose was calculated with NJOY 2021, with ENDF/B.VIII.0 cross section library, for neutrons in Si, using Robinson or Akkerman partition functions, as a function of the threshold energy. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, Si target, Robinson partition function, Ed=21 eV and ENDF/B.VIII.0.
NIEL dose calculated with NJOY 2021, with ENDF/B.VIII.0 cross section library, for neutrons in GaAs - Ga and As combined by means of Bragg's additivity rule -, using Robinson or Akkerman partition functions, as a function of the threshold energy. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, GaAs target, Robinson partition function, Ed=21.5 eV (e.g. see [Campesato et al. (2019)]) and ENDF/B.VIII.0.
Analysis with NJOY 2016 (ENDF/B.VII.1)
NIEL dose was calculated with NJOY 2016, with ENDF/B.VII.1 cross section library, for neutrons in Si, using Robinson or Akkerman partition functions, as a function of the threshold energy. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, Si target, Robinson partition function, Ed=21 eV and ENDF/B.VIII.0.
NIEL dose calculated with NJOY 2016, with ENDF/B.VII.1 cross section library, for neutrons in GaAs - Ga and As combined by means of Bragg's additivity rule -, using Robinson or Akkerman partition functions, as a function of the threshold energy. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, GaAs target, Robinson partition function, Ed=21.5 eV (e.g. see [Campesato et al. (2019)]) and ENDF/B.VIII.0.
Comparison with ASTM-E722 standards
NIEL dose calculated with ASTM-E722-19, ASTM-E722-14 and ASTM-E722-09 for neutrons in Si. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, Si target, Robinson partition function, Ed=21 eV and ENDF/B.VIII.0.
NIEL dose calculated with ASTM-E722-19, ASTM-E722-14 and ASTM-E722-09 for neutrons in GaAs. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, GaAs target, Robinson partition function, Ed=21.5 eV (e.g. see [Campesato et al. (2019)]) and ENDF/B.VIII.0.
NIEL dose calculated with Kerma function of ASTM-E722-19, ASTM-E722-14 and ASTM-E722-09 for neutrons in GaAs. The reactor spectral fluences are those of ITN-ΣΣ (from [Angelescu et al. (1994)]), IPEN/MB-01 (from [Bitelli et al. (2009)]), TRIGA-Vienna (from [Cagnazzo (2014)]), TRIGA ENEA Casaccia and TAPIRO ENEA Casaccia. TRIGA ENEA spectrum is measured at 100 kW in the Lazy Susan channel. TAPIRO ENEA spectrum is measured at 4 kW in the Radial channel 1. The values are divided by the one obtained with NJOY 2021, GaAs target, Robinson partition function, Ed=21.5 eV (e.g. see [Campesato et al. (2019)]) and ENDF/B.VIII.0.
References
T. Angelescu et al., Nucl. Instr. and Meth. in Phys. Res., vol. 345, 2, pp. 303-307, 1994
U. Bitelli and F.P. Martins, Brazilian Journal of Physics, vol. 39, pp. 39-43, 2009
M. Cagnazzo et al., 23rd International Conference Nuclear Energy for New Europe, 2014