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

2. Outline Introduction The model Results and discussion Summery

3. Introduction Why ? Triaxiality Wobbling mode TSD Signature splitting 、 signature inversion 、 chiral band doublets 、 wobbling mode 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 Nuclear shape A~80 and A~160 mass region D.G.Sarantites et al., Phys. Rev. C 57(1998)R1 H.Schnack-Petersen et al., Nucl. Phys. A 594(1995)175 163 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) 175 Hf 174 Hf 161 Lu 162 Lu 163 Lu 164 Lu 167 Lu 165 Lu 168 Lu 166 Hf 168 Hf 170 Hf 171 Hf 173 Hf 172 Hf 167 Ta

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 E LD is liquid drop model energy E corr is the quantal effect correction to the energy, which includes both the shell correction and the pairing correction E rot 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 162 Lu with the configuration of

10. 3. TRS for odd-odd Lu isotopes

11. Experimental routhian for TSD1 and TSD3 in 164 Lu Comparison the experimental and previous results with our calculated results Confirmation of the our calculation 0.93MeV1.11MeV

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- 167 Lu and the lowest TSD band in odd-odd 162,164,168 Lu isotopes

14. 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. TSD shape remain in these odd-odd Lu isotopes There is the similar stability of the superdeformed triaxial shape in odd-odd Lu isotopes with the odd-A Lu wobbling nuclei. The role of the extra neutron added to an odd-A Lu have been investigated.

15. Thank you !