A-Level Physics OCR B H557

6.2.1: Probing deep into matter

#6.2.1a(i)

use of particle accelerators to generate high-energy beams of particles for scattering

#6.2.1a(ii)

evidence from scattering for a small massive nucleus within the atom

*Development of the nuclear model *

#6.2.1a(iii)

evidence of discrete energy levels in atoms

For example from collisions with electrons or from line spectra

#6.2.1a(iv)

a simple model of the atom as the quantum behaviour of electrons in a confined space

#6.2.1a(v)

simple picture of the quark structure of protons and neutrons

#6.2.1a(vi)

application of conservation of mass/energy, charge and lepton number in balanced nuclear equations

#6.2.1a(vii)

relativistic calculations for particles travelling at very high speed, for example in particle accelerators or cosmic rays.

#6.2.1b

Make appropriate use of:

(i) the terms: energy level, scattering, nucleus, proton, neutron, nucleon, electron, positron, quark, gluon, neutrino, hadron, lepton, antiparticle, lepton number

by sketching and interpreting:

(ii) paths of scattered particles

(iii) electron standing waves in simple models of an atom.

#6.2.1c(i)

motion of a charged particle in magnetic field using $F = qvB$

#6.2.1c(ii)

kinetic and potential energy of a scattered charged particle

#6.2.1c(iii)

$E_{rest} = mc^2$ and relativistic factor

#6.2.1c(iv)

$E_{total} = γE_{rest}$

6.1.2

Charge and field

6.2.2

Ionising radiation and risk

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