Bandheads of rotational bands and time odd fields
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Bandheads of Rotational Bands and Time-Odd Fields PowerPoint PPT Presentation


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Bandheads of Rotational Bands and Time-Odd Fields. UTK-ORNL DFT group. Outline. Work: Large-scale HFB calculations with various Skyrme functionals All time-odd terms included Mixed pairing in the p.p. channel (with two flavors: fit on 120 Sn average pairing gap and local fit on 162 Dy)

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Bandheads of Rotational Bands and Time-Odd Fields

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Bandheads of rotational bands and time odd fields

Bandheads of Rotational Bands and Time-Odd Fields

UTK-ORNL DFT group


Outline

Outline

Work:

  • Large-scale HFB calculations with various Skyrme functionals

  • All time-odd terms included

  • Mixed pairing in the p.p. channel (with two flavors: fit on 120Sn average pairing gap and local fit on 162Dy)

  • Triaxiality effects included

  • Playground:

  • Well-deformed rare-earth nuclei

  • Experimental data is rotational bandheads excitation energy

  • Motivations:

  • Effects of time-odd fields

  • Benchmarking of EFA

Test of the quality of the EFA approximation (163Tb, SIII interaction, 14 deformed shells)


Results

Results

Impact of time-odd fields on (3)

Impact of time-odd fields on q.p. energies

(different schemes)

Impact of time-odd fields on q.p. energies

(systematics)

Triaxiality


Conclusions future plans

Conclusions – Future Plans

  • Time-odd fields negligible for most g.s. properties (including masses, q.p. excitation spectrum, (3), …)

  • BUT… known to play a role in cranking, TDHF, GT resonance, etc.

How to constrain these terms effectively ???

  • Comparison with experiment:

  • Most Skyrme interaction have “wrong” level density  q.p. spectrum good qualitatively but insufficient quantitatively

  • Performing a SVD on odd-even g.s. could be very useful to probe sensitivity of time-odd coupling constants

  • Treatment of pairing is crucial: why not begin with including Coulomb and CM pairing (which are always there irrespective of the p-p functional) ?


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