12th physics. NCERT notes

Beta Particles:

A nucleus that decays spontaneously by emitting an electron or a positron is said to undergo beta decay. Like alpha decay, this is a spontaneous process, with a definite disintegration energy and half-life.

Beta Decay:

In β decay, an electron is emitted by the nucleus.

In β+ decay, a positron is emitted by the nucleus.

In beta-minus decay, a neutron transforms into a proton within the nucleus according to

whereas in beta-plus decay, a proton transforms into neutron (inside the nucleus) via

The above processes show that mass number A of a nuclide undergoing beta decay does not change.

How useful was this post?

Click on a star to rate it!

Average rating / 5. Vote count:

As you found this post useful...

Follow us on social media!

We are sorry that this post was not useful for you!

Let us improve this post!

Leave a Reply