James Ashton Dare has written:

'Construction and test of an electron multiplier alpha particle detector'

'Construction and test of an electron multiplier alpha particle detector'

A Geiger counter, also called a Geiger-Müller counter, is a type of particle detector that measures ionizing radiation. They detect the emission of nuclear radiation: alpha particles, beta particles or gamma rays. A Geiger counter detects radiation by ionization produced in a low-pressure gas in a Geiger-Müller tube

There are 2 neutron in an alpha particle.

The alpha particle is much more massive than a beta particle. A beta particle is an electron, which has very little mass. An alpha particle is a helium nucleus, and consists of two protons and two neutrons.

Alpha Particle