Topic 7 Flashcards
Alfa particle/ 1 product from alfa radiation
4 2+
He
2
Helium NUCLEUS
Beta minus gives
0
e (e-) + antineutrino ( ̅νe)
-1
n → p+ + e- + ̅νe
Beta plus gives
0
e (positron/”anti-electron”) + (electron-)neutrino (νe)
+1
Gamma reaction
e.g.
234 X
Th
90
Rank the following in descending order of ability to cause ionization: alfa particle, beta particle, gamma particle, neutrino
- (Highest). Alfa (lots of charge, grab electrons, don’t penetrate long but ionizes a lot)
- Beta (has to collide to knock out electron)
- Gamma (has to have direct collision)
- Netrino (none!)
What happens to Alfa beta gamma in magnetic field?
Gamma = NOTHING! Has no charge
Alfa = bends, larger radius than beta since much larger mass, opp direction beta
Beta = bends, a lot more/smaller radius than Alfa and opp direction
Name three factors that influence range Alfa particles travel in air
KE of the particles
Density of air
(Charge, but should be same)
What is Binding Energy?
BE is the energy required to SEPARATE A NUCLEUS INTO ITS PARTS
or the energy released when a nucleus is assembled from its constituent parts.
What are baryons?
Hadrons (particle made of quarks)
Particle consisting of 3 quarks.
What is the structure of a proton in terms of quarks?
uud
What is a neutron
udd
What are mesons?
Particle made of 2 quarks (one quark and an anti-quark, but not its own)
What is the charge of u c t quarks?
+2/3
Anti will be neg
Charge of d s b quarks
-1/3
Anti will be pos
Charge of leptons electron muon tauon and antilrptons
-1
Antiprotons = 0
