when conductivity of a semi conductor breaks

A.  It is an ionizing radiation
B.  It is unable to penetrate human skin
C.  It is toxic to human tissues
D.  It is not cost-effective

Brief Facts About Alpha Radiation;

A positively charged nuclear particle identical to the nucleus of a helium atom consists of two protons and two neutrons and is ejected at high speed in certain radioactive transformations called also alpha, alpha radiation, alpha ray. The first is an alpha particle. These particles consist of two protons and two neutrons and are the heaviest type of radiation particle. Many of the naturally occurring radioactive materials in the earth, like uranium and thorium, emit alpha particles. An example most people are familiar with is the radon in our homes.