Nuclear decay is represented by two different types of models. In the NetLogo version, the red radioactive parent nuclei become blue non-radioactive daughter nuclei based on a particular decay rate, which the user may adjust to compare isotopes. In the Vensim and STELLA versions, isotopes with different half-lives may be compared. Note that the comparison should occur between half-lives measured in the same units. THE MODELS Vensim Version Vensim PLE Software Right-click to download the model Nuclear Decay Vensim STELLA Version isee Player Software Right-click to download the model Nuclear Decay STELLA PC Nuclear Decay STELLA Mac NetLogo Version NetLogo Software Right-click to download the model Nuclear Decay NetLogo NETLOGO MODEL STELLA MODEL [Diagram Level | Equations Level | Graphs ] Amt_Nuclide(t) = Amt_Nuclide(t - dt) + (- Rate_of_decay) * dt INIT Amt_Nuclide = 1000 OUTFLOWS: Rate_of_decay = Decay_Constant*Amt_Nuclide Decay_Constant = LOGN(2)/Half_life Half_life = 30 Time Specs Range: 0 -100; dT = 1; Integration Method = Runge-Kutta 4 Sensi Specs Run #1: Half_life = 5.26 Run #2: Half_life = 28.8 Run #3: Half_life = 30.0

Home | Contact | Site Map | Search