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Quantal descriptions of Superdeformed states of Ca and Ar

Quantal descriptions of Superdeformed states of Ca and Ar. Makito Oi ( Senshu University, Tokyo) Eiji Ideguchi (CNS, University of Tokyo). Introduction. Superdeformed states in light systems: 40 Ca(8p-8h); 36 Ar(4p-4h); 40 Ar (“4p-4h”) Recently, 42 Ca(4p-4h? 8p-8h?). p 1/2.

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Quantal descriptions of Superdeformed states of Ca and Ar

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  1. Quantal descriptions of Superdeformed states of Ca and Ar MakitoOi (Senshu University, Tokyo) EijiIdeguchi (CNS, University of Tokyo)

  2. Introduction • Superdeformed states in light systems: 40Ca(8p-8h); 36Ar(4p-4h); 40Ar (“4p-4h”) • Recently, 42Ca(4p-4h? 8p-8h?).

  3. p1/2 p1/2 f5/2 f5/2 p3/2 p3/2 f7/2 f7/2 d3/2 d3/2 s1/2 s1/2 d5/2 d5/2 Single-particle model space proton neutron g9/2 g9/2 40 40 28 28 EF 20 20 EF 42Ca 8 8

  4. Self-consistent cranking 42Ca 16 14 12 10 8 6 4 2

  5. Occupation number proton neutron p(4p-4h) x n(4p-2h) proton neutron neutron 42Ca

  6. Quadrupole deformation γ 1o 0o 0.54 Triaxiality β 0.52 −16o Angular momentum Elongation 42Ca 0.46 Angular momentum

  7. Pairing gap energy 42Ca

  8. Backbending plot 42Ca

  9. Moment of inertia 42Ca

  10. Backbending systematics

  11. Conclusion • Rotational band in 42Ca: Cranked HFB calculation • Superdeformation? • 8p-”6”h configuration [4p-4h x (2+2)p-2h ] • Backbendingdue to g9/2 at I=20. • Qtand high-spin experiments.

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