NEA-1885 DART-V.1.

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

NAME, COMPUTER, PROBLEM, SOLUTION, RESTRICTIONS, CPU, AUXILIARIES, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM, AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM

DART version 1.0

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
DART-V.1	NEA-1885/01	Tested	13-MAY-2015

Machines used:

Package ID	Orig. computer	Test computer
NEA-1885/01	Linux-based PC,UNIX W.S.	Linux-based PC

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3. DESCRIPTION OF PROGRAM OR FUNCTION

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 are 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

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4. METHODS

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

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

None noted.

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6. TYPICAL RUNNING TIME

For ion projectiles, a few seconds. For neutron projectile, a few minutes.

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8. RELATED OR AUXILIARY PROGRAMS

The DART binaries and the graphical user interface “dart_ihm” are included.

The libraries needed to run DART can be created using NJOY (distributed by the Data Bank Computer Program Service, package PSR-0480).

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9. STATUS

Package ID	Status date	Status
NEA-1885/01	13-MAY-2015	Tested restricted

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10. REFERENCES

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

NEA-1885/01, included references:

- D. Simeone, L. Luneville
DART version 1 User Guide, 2014

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11. HARDWARE REQUIREMENTS

LINUX 32 or 64 bits PC. Unix on Mac.

DART v1.0 requires 2 Mbytes of disk space. The associated nuclear data library, ENDFB-VI, requires 400 Mbytes of disk space.

DART version 1.0 was tested at the NEA Data Bank on: