The production of these particles decreases both the atomic number and mass number of their neutron-rich sources, and they have same constituents as a helium-4 nucleus.
The enormous range of timescales on which these particles are produced are related to their energies by the Geiger–Nuttall law. George Gamow modeled the production of these particles in terms of quantum tunneling out of a potential well. The production of these charged particles by (*) americium-241 underlies the operation of smoke detectors. The production of these particles decreases both the atomic number and mass number of their neutron-rich sources, and they have same constituents as a helium-4 nucleus. A sheet of paper can easily stop —for 10 points—what form of ionizing radiation, composed of two protons and two neutrons?
The enormous range of timescales on which these particles are produced are related to their energies by the Geiger–Nuttall law.
alpha particles [or alpha radiation; or helium-4 nucleus before mention; do not accept or prompt on “helium” or “helium atom”] &lt;SE&gt;