Decay Rate Comparison - Maple Programming Help

Online Help

All Products    Maple    MapleSim


Home : Support : Online Help : Math Apps : Natural Sciences : Biological and Chemical Sciences : MathApps/DecayRateComparison

Decay Rate Comparison

Main Concept

The decay rate of a radioactive substance is characterized by its half-life (τ1/2), a quantity that represents the time taken for a given amount of material to decay into half of its initial value. The amount of radioactive substance N left in a sample at time t is given by

Nt=Nt=0 2t/τ1/2,

 

which means that radioactive substances with big half-life are spent slower than those with small half-life.

 

The following graph shows a comparison of decay rates of some of the frequently encountered radioactive substances:

 

Fluorine-18

synthesized, used as a body tracer in positron emission tomography

Cesium-137

product of nuclear weapons and reactors, great health hazard

Technetium-99m

synthesized, used as a body tracer for gamma cameras

Americium-241

present in nuclear waste, used in smoke detectors

Radon-222

biggest source of radiation exposure, second most frequent cause of lung cancer

Radium-226

highly radioactive, formerly used in luminescent paint, spas, and health products

Iodine-125

synthesized, used in radiation cancer treatment

Carbon-14

present in organic materials, used in archeology to date organic remains

Polonium-210

used in first nuclear weapons, highly toxic to humans

Plutonium-239

synthesized, fissile, used in nuclear reactors and weapons

Cobalt-57

synthesized, used in radiodiagnosis to detect vitamin B12 deficiency

Uranium-234

by-product of uranium enrichment, not fissile

Cobalt-60

synthesized, used for radiodiagnosis and sterilization

Uranium-235

fissile, used to sustain chain reactions in nuclear power plants and weapons, enrichment methods increase its concentration

Strontium-90

present in nuclear fallout and waste, used in bone cancer therapy

Uranium-238

most common uranium in nature, not fissile but fissionable by neutron absorption

 

Select up to three radioactive isotopes, enter the quantity of the radioactive sample, and compare their decay rates.

Select the reference isotope   

 

Select the second isotope  

 

Select the third isotope   

 

Specify the amount of radioactive substance

 

Select time scale

 

 

 

 

More MathApps

MathApps/NaturalSciences

 


Download Help Document

Was this information helpful?



Please add your Comment (Optional)
E-mail Address (Optional)
What is ? This question helps us to combat spam