Annihilation Principle [SEP] performer
Annihilation Principle
Annihilation Principle is the fourth studio album by American thrash metal band Lȧȧz Rockit. It was released in 1989 on Roadrunner Records/Enigma Records and follows 1987's "Know Your Enemy". It was itself followed by "Nothing's Sacred", released in 1991. This is the final album featuring the classic line-up.
Track listing.
All songs written by Lȧȧz Rockit, unless otherwise stated
Note.
The 2009 re-issue by Massacre Records contains a DVD of their 1988 performance
Positron annihilation spectroscopy
Positron annihilation spectroscopy (PAS) or sometimes specifically referred to as Positron annihilation lifetime spectroscopy (PALS) is a non-destructive spectroscopy technique to study voids and defects in solids.
Theory.
The technique operates on the principle that a positron or positronium will annihilate through interaction with electrons. This annihilation releases gamma rays that can be detected; the time between emission of positrons from a radioactive source and detection of gamma rays due to annihilation corresponds to the lifetime of positron or positronium.
When positrons