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written by Wolfgang Christian
The Two State Nuclear Decay model simulates the radioactive decay of atomic nuclei into other nuclei.  In this model, the resultant nuclei are stable and there are no intermediate decay states.  Although the decay of a radioactive nucleus (radionuclide) is spontaneous and the time of its decay cannot be predicted, the probability of its decay k is constant and is usually known.  The model displays a radioactive sample with N nuclides.  Radioactive nuclides are color-coded red and decayed nuclides are color-coded blue. Users can set the number of nuclides N, the decay constant k, and the time interval between measurements before the simulation is run. The simulation counts the number of decay events and stops when there are no radionuclides remaining.

The Two State Nuclear Decay model was developed using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_nuclear_TwoStateNuclearDecay.jar file will run the program if Java is installed.

Please note that this resource requires at least version 1.5 of Java.
View the source code document attached to this resource
Subjects Levels Resource Types
Modern Physics
- Nuclear Physics
= Radioactivity
Thermo & Stat Mech
- Probability
= Poisson Distribution
- Lower Undergraduate
- Upper Undergraduate
- High School
- Instructional Material
= Interactive Simulation
Appropriate Courses Categories Ratings
- Algebra-based Physics
- AP Physics
- Lesson Plan
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Intended Users:
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
exponential decay, half-life, radioactive decay, statistical physics
Record Cloner:
Metadata instance created January 7, 2011 by Wolfgang Christian
Record Updated:
June 13, 2014 by Andreu Glasmann
Last Update
when Cataloged:
January 8, 2011
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program TWO STATE NUCLEAR DECAY MODEL, Version 1.0 (2011), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067).
W. Christian, Computer Program TWO STATE NUCLEAR DECAY MODEL, Version 1.0 (2011), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067>.
APA Format
Christian, W. (2011). Two State Nuclear Decay Model (Version 1.0) [Computer software]. Retrieved July 6, 2015, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067
Chicago Format
Christian, Wolfgang. "Two State Nuclear Decay Model." Version 1.0. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067 (accessed 6 July 2015).
MLA Format
Christian, Wolfgang. Two State Nuclear Decay Model. Vers. 1.0. Computer software. 2011. Java 1.5. 6 July 2015 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {Two State Nuclear Decay Model}, Month = {January}, Year = {2011} }
Refer Export Format

%A Wolfgang Christian
%T Two State Nuclear Decay Model
%D January 8, 2011
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067
%O 1.0
%O application/java

EndNote Export Format

%0 Computer Program
%A Christian, Wolfgang
%D January 8, 2011
%T Two State Nuclear Decay Model
%7 1.0
%8 January 8, 2011
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=10576&DocID=2067

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Two State Nuclear Decay Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Two State Nuclear Decay Model.

relation by Wolfgang Christian

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