This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 10/24/2011 1 Chapter 7: The Fires of Nuclear Fission Nuclear Fission (continued) Oct. 26/2011 Review from Last Lecture • Nuclear weapons • Coal ‐ fired/nuclear power plants (TMI, Japan) 2 Types of Nuclear Radiation • Alpha ( α ) decay: involves the loss of an alpha particle from a nucleus ( He nucleus) • A decreases by 4, Z decreases by 2 (for each alpha particle emitted alpha particle emitted) • Common for elements heavier than lead (Z=82) Types of Nuclear Radiation • Beta ( β ) decay: involves loss of beta particle – It’s NOT the expulsion of a beta particle from the nucleus (no e ‐ in the nucleus!) – It’s the conversion of a neutron into a proton (in It s the conversion of a neutron into a proton (in nucleus) and the expulsion of a beta particle • Z increases by 1; mass number does not change 4 e p n 1 1 1 1 − + → 10/24/2011 2 Types of Nuclear Radiation • Gamma ( γ ) emission: high ‐ energy gamma photons emitted from an excited nucleus • Energy of atom is...
View Full Document