Which force is responsible for alpha decay through quantum tunnelling?
Quick Answer
The strong nuclear force helps trap alpha particles inside nuclei, while quantum tunnelling allows them to escape. The decay itself is governed by nuclear forces and quantum mechanics.
The Full Story
Alpha decay happens when a nucleus emits an alpha particle, which is a helium-4 nucleus. The strong nuclear force binds the alpha particle inside the nucleus, but quantum mechanics allows it to tunnel through the barrier and escape. This process is common in heavy radioactive elements such as uranium and radium. The decay changes the element into another one with two fewer protons and two fewer neutrons. Alpha decay was important in the early history of nuclear physics and radioactivity.
Key Facts
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"A particle escapes a nucleus without enough classical energy."
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