Effects of highorder deformation on highspin structure in

Effects of high-order deformation on high-spin structure in the heaviest nuclei accessible by spectroscopy experiments 刘红亮 西安交通大学理学院 2012年 8月 兰州 1

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

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

Introduction 252 No R. -D. Herzberg et al. , Phys. Rev. C 65, 014303 (2001). 254 No S. Eeckhaudt et al. , Eur. Phys. J. A 26, 227 (2005). 256 Rf P. T. Greenlees et al. Phys. Rev. Lett. 109, 012501 4(2012).

Introduction Previous theoretical studies 5

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

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

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

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). 9

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

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). 11

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

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

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

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

Thank you! 16