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radiochemicals
 Location: Radiochemicals > Radiation Safety and Technical Support > Calculators > Activity decay
Radiation Safety and Technical Support
Regulations
Safe and Secure - Working Safely with Radioactivity
Radiation Safety Products
Packaging
Physical Properties of Common Radionuclides
Calculators
Unit conversion
Activity decay
Chemical concentration and labelling ratio
Decay time
Percentage decay
Volume
Counts to Activity
Glossary
Calculation of Remaining Activity

Instructions for use:
1. Enter initial activity
2. Select appropriate units from the drop-down list
3. Enter decay period
4. Select appropriate units from the drop-down list
5. Either a) select an isotope from the drop-down list
   (in which case the half-life, in days, will fill automatically)
   or b) enter the half-life of your isotope and select appropriate units
6. Click 'Calculate'
7. Click 'Reset' before entering new values

* = Compulsory fields

enter values
 enter units
* Initial activity *
* Decay period *
* Half-life *



There will be remaining after  decay