PHYS3002. Nuclei and Particles. Synoptic.personal.soton.ac.uk/.../synoptic/synoptic_slides.pdf ·...

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Transcript of PHYS3002. Nuclei and Particles. Synoptic.personal.soton.ac.uk/.../synoptic/synoptic_slides.pdf ·...

PHYS3002. Nuclei and Particles.Synoptic.

Rutherford Scattering and cross section

Cross section

:

Alpha Decay

Beta Decay

Gamma Decay

The total angular momentum change, L in a nuclear transition can take the values |Li − Lf | ≤L ≤ |Li + Lf |, L>0This is also subject to selection rules for the parity difference between initial and final states: P = (−1)L, for electric transitionsand P = (−1)L−1, for the (even further suppressed) magnetic transitions. Here are some examples: 2+ → 1−(E1)2+ → 1+(M1)3+ → 1−(M2)3+ → 1+(E2)

The Mőssbauer Effect

Accelerators and particle kinematics

CM frame:

Fixed target:

CMS DETECTOR

Weak interactions

Electromagnetic Interactions

QCD(uuu)

Summary of Conservation laws