Flashcards
Nuclear Radiation
Flashcards do conjunto (15)
- 1Where is nuclear radiation emitted from?The nucleus
- 2What is the diameter of a nucleus?10^-15 m
- 3What is the diameter of an atom?~10^-10 m
- 410^-10 m is also known as a .....Angstrom (Å)
- 5What is the equation for alpha decay?(a)X(z) -> (a-4)Y(z-2) + (4)α(2)
(Unstable nucleus -> new daughter nucleus + alpha particle) - 6In alpha decay, what are conserved?Charge and mass
- 7What is the equation for beta- decay?(a)X(z) -> (a)Y(z+1) + (0)β(-1) + ̅νe
(Unstable nucleus -> new daughter nucleus + beta- particle + electron antineutrino) - 8What is the equation for beta+ decay?(a)X(z) -> (a)Y(z-1) + (0)β(1) + ν
(Unstable nucleus -> new daughter nucleus + beta+ particle + electron neutrino) - 9Basics on NeutrinoVery small mass and no charge
Hypothesized before detected, as from certain interactions momentum wasn't conserved, so there had to be another particle - 10What is gamma decay?Gamma radiation emitted from an excited nucleus after alpha or beta decay
- 11What properties does gamma have as electromagnetic radiation?Mass-less
Uncharged
Travels at speed of light - 12What is a positron?Basically an "anti-electron" as it's an antiparticle of an electron.
It has the same mass of an electron and charge= +e - 13What can we use to detect radiation?A Geiger counter (which uses a Geiger-Muller tube)
- 14What is the composition of an alpha particle?2 protons, 2 neutrons, no electrons (same as helium nucleus)
- 15Rewrite beta- and beta+ decay in terms of protons and neutronsbeta- : n -> p + (0)β(-1) + ̅νe
beta+ : p -> n + (0)β(1) + ve