Quantal descriptions of superdeformed states of ca and ar
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Quantal descriptions of Superdeformed states of Ca and Ar PowerPoint PPT Presentation


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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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Quantal descriptions of Superdeformed states of Ca and Ar

MakitoOi (Senshu University, Tokyo)

EijiIdeguchi (CNS, University of Tokyo)


Introduction

  • Superdeformed states in light systems:

    40Ca(8p-8h); 36Ar(4p-4h); 40Ar (“4p-4h”)

  • Recently, 42Ca(4p-4h? 8p-8h?).


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


Self-consistent cranking

42Ca

16

14

12

10

8

6

4

2


Occupation number

proton

neutron

p(4p-4h) x n(4p-2h)

proton

neutron

neutron

42Ca


Quadrupole deformation

γ

1o

0o

0.54

Triaxiality

β

0.52

−16o

Angular momentum

Elongation

42Ca

0.46

Angular momentum


Pairing gap energy

42Ca


Backbending plot

42Ca


Moment of inertia

42Ca


Backbending systematics


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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