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SR-NIEL – 7

Screened Relativistic (SR) Treatment for NIEL Dose

Nuclear and Electronic Stopping Power Calculator

(version 10.14)

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Total NIEL Dose Calculator for Neutron Spectral Fluence with Kinetic Energies up to 20 MeV using ASTM Standards

Damage Function
ASTM Standard
Target Material Displacement Threshold Energy [eV]
Neutron Spectral Fluence
values:
use dot "." as decimal separator;
at least, a pair (energy and spectral fluence) of values are required
Neutron Energy
[MeV]		Spectral Fluence
[cm-2 MeV-1]
Spectrum Interpolation:
Spectrum Parameters
Requested Fluencetotal: [cm-2]
Elow
(Lowest energy above which the total fluence is evaluated.)		 [MeV]
Emin
(Lowest energy from which the dose calculation is performed.)		 [MeV]


EXAMPLE:
Copy and paste the data here to reproduce the following example. Neutron flux spectrum in ITN-ΣΣ facility, normalized to 9.305x105 n/(cm2 s):

Fluxes are derived from [Angelescu et al. (1994)].

NOTE:
  • The present Neutron NIEL calculator is based on the values published on ASTM E722-09, E722-14 and E722-19.
  • For ASTM E722-09 the displacement threshold energy used is 25 eV for Si and 10 eV for GaAs
  • For ASTM E722-14 the displacement threshold energy used is 20.5 eV for Si and 10 eV for GaAs
  • For ASTM E722-19 the displacement threshold energy used is 10 eV for GaAs
  • Currently, the lower energy limit for Neutrons NIEL is 1e-4 eV. The higher energy limit is 20 MeV.
  • In the following table, the ENDF/B cross section library employed for Si and GaAs in ASTM standard is reported:


    Currently, ENDF/B.VIII.0 is the most recent library.

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