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Challenges on phase transitions and gamma-strength functions Magne Guttormsen

Challenges on phase transitions and gamma-strength functions Magne Guttormsen Department of Physics, University of Oslo. Oslo method Thermodynamics Electromagnetic transitions Challenges. Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007. E x.

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Challenges on phase transitions and gamma-strength functions Magne Guttormsen

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  1. Challenges on phase transitions and • gamma-strength functions • Magne Guttormsen • Department of Physics, University of Oslo • Oslo method • Thermodynamics • Electromagnetic transitions • Challenges Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  2. Ex T = 1 MeV    Spin 2-6 ħ Spin-energy diagram Yrast line (no levels) Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  3. M F0 - G M-1 = 1 W The first generation method F0 F1 F2 F3 Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  4. Gamma-ray multiplicity E Spin E Spin Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  5. The Brink Axel hypothesis Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  6. Does it work? Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  7. Nuclear entropy Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  8. canonical - canonical ensemble Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  9. Rare-earth region, case erbium Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  10. Preliminary Proton number Z = 50 Neutron Cooper pairs Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  11. J.Lee and J.M.Kosterlitz, Phys. Rev. Lett. 65, 137 (1990) Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  12. Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  13. Heat bath Isolated E T T Boltzmannfactor S = S0 + S* + S1 Challenges, new thermodynamic Negative Cv(E) and T(E) Smoothed (up to E = 100 MeV) Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  14. Loved child, many names • Radiative strength function (RSF) • Photon strength function (PSF) • Gamma-ray strength function Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  15. Ex 8 5 2 E First generation procedure Axel-Brink factorization into  and f 2 4 6 8 2 4 6 8 Simulation tests of the Oslo method Event-by-event data generated in Prague with DICEBOX Sorted in Oslo into (Ex, E) matrix Ex 8 5 2 E Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  16. Results from the blind test Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  17. Radiative strength functions Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  18. Pygmy resonance Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  19. Scissors mode Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  20. Giant dipole resonance Kadmenskii, Markushev and Furman (KMF) model Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  21. Unexpected RSF upbend Physics News Update Voinov et al., Physical Review Letters,1 October 2004. Also observed in: Mo, V, Sc, Ni, Ti (3He, 3He) and (3He, 4He) reactions Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  22. Upbend in iron Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  23. Temperature dependence? Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

  24. Verifications Budapest Research Reactor (n, ) reaction INPP, Ohio University (d,n) reaction Subatomic and Astrophysics Division Annual Meeting 2007

  25. Challenges • Understand the difference in quantities observed in different experiments • Pygmy resonance • GEDR-tail match • Low energy -strength • Spin distribution • Parity asymmetry • Thermalization • -canonical or canonical ensemble - or another theory? • Critical T, how to interpret and measure? • Single quasi-particle entropy Workshop on
Level Density and
Gamma Strength in Continuum, Oslo, May 21 - 24, 2007

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