1. for BCS quasiparticles
Combi
A combinatorial model
for BCS quasiparticles
Magne Guttormsen
Department of Physics and SAFE
University of Oslo

2. The underlying physics
Thermodynamics of N ≈ 100 systems
Spin distributions
Parity distributions
Pair breaking
Quenching of pair correlations

3. Level density and entropy
E = 2e
E = 0

4. Single-particle orbitals
BCS theory 4

5. Nilsson scheme pf sd p s 5

6. Finding excitation energy
Quasiparticles
Collective motion 6

7. Moment of inertia R I j 4+ 2+ 0+ 7

8. Results on titanium 8

9. Summary Combi is fast Although simple, contains the most
Perfect to locate features
High spin dependency