Low energy beta particles, say, from tritium, are called soft beta particles.
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Alpha Particle
This particle is a neutron:neutron-----------proton + electron + neutrino
is a beta particle,It is negatively charged,It has one electron.
Beta particle symbols: e- or β- or B- (electrons) or e+ or β+ or B+ (positrons). If the - or + sign is omitted, assume that the beta particles are electrons. The Greek beta character is usually preferred, but a B is acceptable if Greek fonts are not available.
An alpha particle is a helium-4 nucleus. It has a mass of about 4 atomic mass units.