1. 1 Effects of high-order deformation on high-spin structure in the heaviest nuclei accessible by spectroscopy experiments 2012 8

2. 2 Introduction R.-D. Herzberg and P.T. Greenlees, Prog. Part. Nucl. Phys. 61, 674 (2008). The heaviest nuclei accessible by spectroscopy experiments

3. 3 R.-D. Herzberg et al. Nature 442(2006)896 S.K. Tandel et al. Phys. Rev. Lett. 97(2006)082502 Hessberger et al. Eur. Phys. J. A 43(2010)55 R.M. Clark et al. Phys. Lett. B 690(2010)19 2-qp isomer 4-qp isomer JYFL ANL GSI LBNL Introduction

4. 4 R.-D. Herzberg et al., Phys. Rev. C 65, 014303 (2001). S. Eeckhaudt et al., Eur. Phys. J. A 26, 227 (2005). P.T. Greenlees et al. Phys. Rev. Lett. 109, 012501 (2012). 252No 254No256Rf

5. 5 Introduction Previous theoretical studies

6. 6 Introduction R.-D. Herzberg et al., Phys. Rev. C 65, 014303 (2001). S. Eeckhaudt et al., Eur. Phys. J. A 26, 227 (2005). Different rotational behaviors observed in 252No and 254No

7. 7 β 6 deformations I. Muntian et al., Phys. Lett. B 500, 241 (2001). Introduction

8. 8 Model Configuration-constrained calculations of potential-energy surfaces F.R. Xu et al., Phys. Lett. B 435, 257 (1998). Standard liquid drop model Strutinsky shell correction calculated from Woods-Saxon potential and Lipkin-Nogami pairing traced by Nuclear shape parametrization TRIAXIAL H.L. Liu et al., Phys. Rev. C 83, 011303(R) (2011). H.L. Liu et al., Eur. Phys. J. A. 47, 135 (2011).

9. 9 Model Total Routhian surface (TRS) calculation of nuclear rotation A deformation-pairing-frequency self-consistent model W. Satula and R. Wyss, Phys. Scr., T 56, 159 (1995). F.R. Xu et al., Nucl. Phys. A 669, 119 (2000). H.L. Liu et al., Phys. Rev. C 86, 011301(R) (2012).

10. 10 Remarkable and stable β 6 deformations Increased binding due to β 6 deformations Solid lines: Cal. with β 6 Dashed lines: Cal. without β 6 Calculation of multi-quasiparticle state H.L. Liu, F.R. Xu, P.M. Walker, and C.A. Bertulani, Phys. Rev. C 83, 011303(R) (2011).

11. 11 Calculation of multi-quasiparticle state Comparison between exp. and cal. Single-particle levels H.L. Liu, F.R. Xu, P.M. Walker, and C.A. Bertulani, Phys. Rev. C 83, 011303(R) (2011).

12. 12 Calculation of collective rotation H.L. Liu, F.R. Xu, and P.M. Walker, Phys. Rev. C 86, 011301(R) (2012). Calculated kinematic moments of inertia (MOIs)

13. 13 H.L. Liu, F.R. Xu, and P.M. Walker, Phys. Rev. C 86, 011301(R) (2012). Calculation of collective rotation Proton and neutron components of the calculated MOIs

14. 14 H.L. Liu, F.R. Xu, and P.M. Walker, Phys. Rev. C 86, 011301(R) (2012). Calculation of collective rotation Shape changes with rotation

15. 15 Significantly improved description of 254No high-K isomers with β 6 deformation The observed different rotational behaviors of 252No and 254No can be understood in terms of β 6 deformation Summary

16. 16 Thank you!