Decay Chain Examples
Cesium (Cs)
Americium (Am)
Haf-ife:
241
95
Am
\	
239
Half-life:
Np
Key


Alpha particle:
a
/ \
Beta particle:
p
< 222 Rn )
Gamma ray:
Y
V1_V
In the example, Rn is the atomic symbol for the element Radon. The number 222 indicates the
atomic mass of the element (or isotope). The number 86 represents the element's atomic
number.
^VpPA Environmental Protection RaclTown Radioactive Atom Activity Set	EPA 402-B-19-021
* * Agency	https://www.EPA.gov/RadTown/Activitv-6-Radioactive-Decav-Chain

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