RSICC CODE PACKAGE CCC-830

 

1.  NAME AND TITLE

            DART-V.1, displacement per atom, primary knocked-on atoms produced in an atomic solid target.

 

RELATED OR AUXILIARY PROGRAMS:

The DART binaries and the graphical user interface “dart_ihm” included. The libraries needed to run DART can be created using NJOY99 (PSR-480)

 

2.  CONTRIBUTORS

CE SACLAY, Nuclear Energy Directorate, F-91191 Gif-Sur-Yvette, France, through the OECD Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France.

 

3.  CODING LANGUAGE AND COMPUTER

Package includes executables for Linux and MacOS systems. No source included. (RSICC ID C00830MNYCP00 NEADB ID: NEA-1885/01).

 

4.  NATURE OF PROBLEM SOLVED

DART calculates the total number of displacements, primary knocked-on atoms, recoil spectra, displacement cross sections and displacement per atoms rates in a poly atomic solid target, composed of many different isotopes, using ENDF/B-VI derived cross sections.

To calculate these values, different incident particles were considered: neutrons, ions and electrons. The user needs only to specify an incident particle energy spectrum and the composition of the target. The number of displaced atoms is calculated within the Binary Collision Approximation framework. To calculate the number of displacements the DART code does not use the classical NRT dpa analytical formula, which is only appropriate for projectile and target of the same mass. It numerically solves the linearized Boltzmann equation for a polyatomic target.

It can be a useful tool to select the nature and energy of ions or electrons in particle accelerators or electron microscopes to mimic the primary damage induced by neutron irradiation in nuclear plants or fission facilities.

Nuclear data:
• Typically any ENDFB format evaluation may be used. This package includes the ENDFB-VI nuclear data library.

Energy ranges:
• Neutron or ion : 10E-11 to 20 MeV

Data library distributed with DART v1.0:
• ENDFB-VI nuclear data library

5.  METHOD OF SOLUTION

The number of displaced atoms is calculated within the Binary Collision Approximation framework, solving integro-differential equations.

 

6.  RESTRICTIONS OR LIMITATIONS

None listed.

 

7.  TYPICAL RUNNING TIME

Run times will vary, based on inputs.

 

8.  COMPUTER HARDWARE REQUIREMENTS

Linux or MacOS Operating systems.

Supported platforms are Linux and MacOS systems. No source files are included.

 

9.  COMPUTER SOFTWARE REQUIREMENTS

Linux or MacOS Operating systems.

 

10. REFERENCES

            10. a) Included Documentation:

            R.M. L. Luneville, D. Simeone, C. Jouanne: Calculation of radiation damage induced by neutrons in compound materials, Journal of Nuclear Materials 353, (2006), 89).

 

 

11. CONTENTS OF CODE PACKAGE

DART is distributed on CD. Included are executables for MacOS and Linux, data libraries, test cases and documentation. Source code is not included in this distribution.

 

12. DATE OF ABSTRACT

June 2015

 

KEYWORDS:ENDF/B FORMAT; COLLISION PROBABILITY; DISPLACEMENT CROSS SECTIONS