SR-NIEL Framework: Physics Handbook
Handbook of SR-NIEL and Nuclear Stopping Power Calculators for Elements and Compounds (for instance, semiconductors)
Website latest update on January 18, 2017
Welcome to the relativistic screening (SR) treatment handbook Website. In these pages you can find information about physics process regarding the Screened Relativistic (SR) Calculator of the Non-Ionizing Energy Loss of electrons, protons and ions passing through an absorber, generating displacement damages and, in case of semiconductors, introducing deep levels resulting from the Frenkel pairs created. NIEL doses are also provided.
Furthermore in the sr-niel website, based on the physics framework here illustrated, an online calculator for the nuclear stopping powers of electrons, protons, light- and heavy-ions is available. The calculations are carried out based on the screened relativistic treatment for (elastic) Coulomb interactions on nuclei from low up to ultra relativistic energies.
In the sr-niel website, a calculator for the probability of generating energetic recoil nuclei is also available. From version 1.5.2, additionally, the estimates of recoil energy fractions deposited via ionizing and non-ionizing processes are accessible using two of the mostly employed analytical approximations of energy partition function.
From version 2.0 the electronic stopping power and ionizing dose calculator are also available.
From version 2.1 the calculator allows one to obtains NIEL values and NIEL doses for neutrons in Si and GaAs absorbers, derived from ASTM-722-09 and ASTM-722-14 standards.
Currently, additional functionalities implenented into NIEL calculators for registered users are:
- electron NIEL with Akkerman partition function;
- proton and ion NIEL with Akkerman partition function;
- NIEL dose calculators for neutrons and neutron spectral fluence in some elements (C, N, Si, Ga, As and, from version 3.5.1, also 0, Al, P, In, Cd, Te, Ge, Zn, Se, Sb ) and their compounds, using Robinson and Akkerman partition functions.
Furthermore, a citical discussion on the usage of 1 MeV neutron equivalent is also available to registered users.
In addition, for registered users are available the following long write-ups:
- NIEL for Electrons and Protons (with only Coulomb scattering and, also, including hadronic contribution) in Silicon employing Robinson and Akkerman partition functions;
- NIEL dose calculation for neutron using Robinson and Akkerman partition functions;
- comparison of Damage Functions obtained with Akkerman and Robinson Partition Functions for some compounds;
- determination of the Damage Function at 1 MeV for Si and some compounds.
The hyperlinks cross-correlation between this website and that regarding the sr-niel web calculators is also implemented in the Main Menu: SR-NIEL Long Write Up of sr-niel.org website from its version 3.4.1.
This project is part of the activities on going at the AMS-02 Milano Bicocca group.
The implementation of SR-NIEL treatment and derived SR-NIEL calculators into ESA (European Space Agency) codes (e.g., SPENVIS, GRAS and Mulassis) is accomplished under ESA contract 4000116146/16/NL/HK with title "Non-Ionizing Energy Loss (NIEL) Calculation and Verification".
A comprehenseve treatment of the screened relativistic physical processes is found in: C. Leroy and P.G. Rancoita (2016), Principles of Radiation Interaction in Matter and Detection - 4th Edition -, World Scientific. Singapore, ISBN-978-981-4603-18-8 (printed); ISBN.978-981-4603-19-5 (ebook); http://www.worldscientific.com/worldscibooks/10.1142/9167; it is also partially accessible via google books.
To be noted that, by quoting WSRID20 upon checking out the shopping cart, a 20% discount will be obtained. The book is also available in kindle edition.