Sunday, August 26, 2007
Alpha, Beta, and Gamma.. with Positron on the sidelame title... (Kelan pa ba naging maganda mga title ng posts ko? hehe..)
What are Alpha Particles?
Particles that consists of two protons and two neutrons (meaning they are positively charged). Because of their large size, they lose energy quickly and therefore, has a weak penetrating power (they can be blocked by human skin). Even if they have low penetrating power, they are a highly ionizing form of radiation.
What are Beta Particles?
Particles that consists of fast-moving electrons ejected from the nuclei. They are smaller than Alpha particles, and can penetrate up to 1 or 2 cm of human flesh. According to this site,http://www.csun.edu/~vchsc006/356b/modE.html, beta particles has a moderate ionizing power.
What are Gamma Rays?
According to the site stated above, Gamma particles are electromagnetic radiation from the nucleus.
(According to en.wikipedia.org, gamma is not a particle, its a ray..)
They have great penetrating power, but weak ionizing power.
(I just noticed this thing.. Penetrating power is inversely proportional to ionizing power.. cool huh?)
What is a Positron?
It is the antimatter counterpart of the electron. It was discovered by Carl D. Anderson in 1932. It is the first evidence of the existence of antimatter. When it collides with an electron, electron-positron annihilation occurs, what happens in an electron-positron annihilation? The electron and the positron converts to its counterpart and the production of gamma ray photons.
Positrons are used in PETs (Positron Emission Topography) and in experiments on accelerator physics.
JOKE: WHO IS POSITRON?
Anak ni Megatron, Pamangkin ni Optimus Prime, inaanak ni Starscream, tsaka bestfriend ni Bumblebee... hahaha
hehe...
