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Lennard-Jones Potential Model
written by Wolfgang Christian
The EJS Lennard-Jones Potential model shows the dynamics of a particle of mass m within this potential.  You can drag particle to change its position and you can drag the energy-line to change its total energy.

The Lennard-Jones potential function is a reasonably accurate model of interactions between noble gas atoms.  The binding energy epsilon is the depth of the potential well and minimum molecular separation are set equal to unity.  This simulation uses uses a natural system of units the mass and the depth of the Lennard-Jones potential set equal to 1. For argon (for example), the unit of distance is 3.4 angstroms, the unit of mass is 40 atomic mass units, and the unit of energy is 0.01 electron-volts; the corresponding unit of time is then 2.2 picoseconds, the unit of velocity is 160 meters per second.

The Lennard-Jones Potential model was created using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_stp_md_LennardJonesPotential.jar file will run the program if Java is installed.  Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.  Additional Ejs models for classical mechanics are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Please note that this resource requires at least version 1.5 of Java.
1 source code document is available
Subjects Levels Resource Types
Thermo & Stat Mech
- Models
= Lennard-Jones Potential
- Upper Undergraduate
- Lower Undergraduate
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- application/java
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Access Rights:
Free access
Program released under GNU-GPL. Narrative is copyrighted.
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Wolfgang Christian
molecular dynamics
Record Cloner:
Metadata instance created November 16, 2008 by Wolfgang Christian
Record Updated:
June 10, 2014 by Andreu Glasmann
Last Update
when Cataloged:
November 15, 2008
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program LENNARD-JONES POTENTIAL MODEL, Version 1.0 (2008), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911).
W. Christian, Computer Program LENNARD-JONES POTENTIAL MODEL, Version 1.0 (2008), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911>.
APA Format
Christian, W. (2008). Lennard-Jones Potential Model (Version 1.0) [Computer software]. Retrieved May 30, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911
Chicago Format
Christian, Wolfgang. "Lennard-Jones Potential Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911 (accessed 30 May 2024).
MLA Format
Christian, Wolfgang. Lennard-Jones Potential Model. Vers. 1.0. Computer software. 2008. Java 1.5. 30 May 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {Lennard-Jones Potential Model}, Month = {November}, Year = {2008} }
Refer Export Format

%A Wolfgang Christian %T Lennard-Jones Potential Model %D November 15, 2008 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911 %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Christian, Wolfgang %D November 15, 2008 %T Lennard-Jones Potential Model %7 1.0 %8 November 15, 2008 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=8306&DocID=911

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Lennard-Jones Potential Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Ejs tool is needed to explore the computational model.

relation by Anne Cox
Supplements STP Textbook Chapter 1: From Classical to Statistical Mechanics

Chapter 1 of Gould and Tobochnik's Statistical and Thermal Physics provides additional underpinnings for this program.

relation by Anne Cox

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