Radioactivity|Activity|Radioactivity Decay Law|Half Life|Average Life|Radioactive Radiations

Radioactivity||Mean Life|| Half Life

Definition OF radioactivity||Activity OF a sample||Laws OF radioactivity||Half life||Mean life||Examples on radioactivity

Gamma Decay|Radioactive Statistical Law|Half Life |Activity|Questions

Gamma Decay|Radioactive Statistical Law|Half Life |Activity|Questions

Laws of Radioactive Decay | Applications of Radioactivity

At t=0 , number of radioactive nuclei of a radioactive substance are x and its radioactivity is y. Half-life of radioactive substance is T. Then,

Half-life period for radioactive element is

Many unstable nuclie can decay spontaneously to a nucleus of lower mass but differnet combination of nucleons. The process of spontaneous emission of radiation is called radioactivity substance. Radioactive decay is a statistical process. Radiaactivity is independent of all external conditions. The number of decays per unit time or decay rate is called activity. Activity exponentially decrease with time. Mean lifetime is always greater than half-life time. n number of alpha -particels per second are being emitted by B atoms of a radioactive element. The half-life of element will be