Annihilation radiation such as Germanium detectors, than with low resolution detectors such as Sodium iodide detectors. Because of their well-defined energy (511 keV) and characteristic, Doppler-broadened shape, annihilation radiation can often be useful in defining the energy calibration of a gamma ray spectrum. Annihilation radiation Annihilation radiation is a term used in Gamma spectroscopy for the gamma radiation produced when a particle and its antiparticle collide and annihilate. Most commonly, this refers to 511-keV gamma rays produced by a normal (negative) electron colliding with a positron. Annihilation radiation is not monoenergetic, unlike gamma rays produced by radioactive decay. The production mechanism of
The Superstar Effect golf, players get to watch each other) and that a 100-meter race is about 10 seconds which does not leave competitors much time to alter their behaviour because of Bolt. The importance of studying the dynamics of rank-order tournaments with heterogeneous competitors reaches beyond the world of sports. Numerous management strategies use competition as an incentive for better productivity, however, according to the superstar effect, if agents are to rival a superstar, they may in fact reduce their efforts. The Superstar Effect The Superstar Effect or "Tiger Woods effect" refers to the change in performance caused by the presence of