Ionising Radiation
Quantum and Nuclear

Alpha particle tracks including a collision with a helium nucleus

Teaching Guidance for 14-16 PRACTICAL PHYISCS

Alpha particle tracks in wet helium. One collided with a helium nucleus. After the collision, the two tracks are at 90° to each other. That angle only occurs when the colliding bodies have equal masses. The photograph is a lucky choice as the fork occurred directly facing the camera.

Ionising Radiation
is used in analyses relating to Radioactive dating
can be analysed using the quantity Half-Life Decay Constant Activity
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