k.+Pachecho+powerpoint+presentation

K.Pacheco PowerPoint Presenation

=__**Radiation PowerPoint**__=

__slide 1:__ Alpha Emission __slide 2:__ Beta Emission __slide 3:__ Positron Emission __slide 4__: Electron Capture __slide 5:__ Gamma Emission

**Alpha Emission**
- an Alpha particle is two protons and two neutrons bound together and is emitted from the nucleus duing some kinda of radioactice decay. - Alpha emission is restricted almost entirely to very heavy nuclei

**Beta Emission**
- Nuclides above the band of stability are unstable bacause their neutron/proton ratio is too big. To make it stable, you have to decrease the number of neutrons. When the electron is emitted from the nucleus, its called a beta particle.

**Positron Emission**
- Nuclides below the band of stability are unstable because the neutron/proton ratio is too small. - a Positron is a particle that has the same mass as an electron, but has a positive charge.

**Electron Capture**
- Electron Capture is another type of decay for nuclides that have a neutron/proton ratio that is too small. - in Electron Capture, an inner orbital electron is captured by the nucleus of its own atom. the inner orbital electron combindes with a proton, and a neutrom is formed.

**Gamma Emission**
- Gamma emission usually occurs immediately following other types of decay, wen other types of decay leave the nucleus in an excited state. - Gamma emission rays support the nuclear shell model. according to the nuclear shell model, gamma rays are produced when nuclear particles undergo transitions in nuclear-energy levels.