State of Decay [SEP] series
State of Decay
State of Decay is the fourth serial of the 18th season in the British science fiction television series "Doctor Who", which was first broadcast in four weekly parts on BBC1 from 22 November to 13 December 1980.
In the serial, three vampire lords rule over a village deliberately kept at a low development level for a thousand years. The lords intend to revive their giant leader vampire the "Great One" that converted them from humans after their spaceship crashed on the planet.
"State of
Decay chain
In nuclear science, the decay chain refers to a series of radioactive decays of different radioactive decay products as a sequential series of transformations. It is also known as a "radioactive cascade". Most radioisotopes do not decay directly to a stable state, but rather undergo a series of decays until eventually a stable isotope is reached.
Decay stages are referred to by their relationship to previous or subsequent stages. A "parent isotope" is one that undergoes decay to form a "daughter isotope". One