The stability of triaxial superdeformed shape in odd-odd 160-168 Lu isotopes

1. The stability of triaxial superdeformed shape in odd-odd 160-168Lu isotopes Tu Ya

2. Outline • Introduction • The model • Results and discussion • Summery

3. 167Ta Signature splitting、signature inversion、chiral band doublets、wobbling mode 166Hf 168Hf 170Hf 171Hf 172Hf 173Hf 174Hf 175Hf Y.S.Chen et al., Phys. Rev.C 28(1983)2439 R. Bengtssen et al.,Nucl. Phys. A 415(1984)189 K.Starosta et al., Phys. Rev. Lett. 86(2001)971 B.Crowell et al., Phys. Rev. Lett. 72(1994)1164 161Lu 162Lu 163Lu 164Lu 165Lu 167Lu 168Lu Triaxiality Wobbling mode 163 Lu (2001)、161， 165， 167 Lu 、 167 Ta (2009) S.W.Odegard et al., Phys. Rev. Lett. 86(2001)5866 D.J.Hartley et al., Phys. Rev. C 80(2009)041304(R) TSD A~80 andA~160mass region D.G.Sarantites et al., Phys. Rev. C 57(1998)R1 H.Schnack-Petersen et al., Nucl. Phys. A 594(1995)175 Why ? Introduction Nuclearshape

4. The model • Hartree-Fock method • potential energy surface calculation TRS method TES method PTES method CSM PSM

5. The total routhian as a function of deformations, and , for a given q.p. configuration(c.f.) may be calculated by Where ELD is liquid drop model energy Ecorr is the quantal effect correction to the energy, which includes both the shell correction and the pairing correction Erot is the collective rotational energy Last term is the sum of energties of the rotating quasiparticles corresponding to the configuration (c.f.)

6. Results and discussion 1.choice of the configurations Calculated single particle Nilsson diagram

9. 2. TRS for a given configuration The total routhian energy and surfaces of 162Lu with the configuration of

10. 3. TRS for odd-odd Lu isotopes

11. 0.93MeV 1.11MeV Confirmation of the our calculation • Comparison the experimental and previous results with our calculated results • Experimental routhian for TSD1 and TSD3 in 164Lu

12. 4. Discussion Experimental dynamic moments of inertia (J(2)),as a function of rotational frequency for the yrast TSD band in odd-even 161-167Lu and the lowest TSD band in odd-odd 162,164,168Lu isotopes

14. TSD shape remain in these odd-odd Lu isotopes Summary • The configuration dependent three dimensional TRS calculations have been performed for the odd-odd Lu isotopes and the results have been compared with the wobbling Lu nuclei. • The role of the extra neutron added to an odd-A Lu have been investigated. There is the similar stability of the superdeformed triaxial shape in odd-odd Lu isotopes with the odd-A Lu wobbling nuclei.

15. Thank you !