Experimental evidence for Chirality

1. Experimental evidence for Chirality S. Frauendorf IKH, Forschungszentrum Rossendorf, Dresden Germany Department of Physics University of Notre Dame USA

2. In collaboration with J. Meng, PKU V. Dimitrov, ISU F. Doenau, FZR U. Garg, ND K. Starosta, MSU S. Zhu, ANL

3. Consequence of chirality: Two identical rotational bands.

4. The prototype of a chiral rotor Frauendorf, Meng, Nucl. Phys. A617, 131 (1997)

5. Particle – Rotor model: Frauendorf, Meng, Nuclear Physics A617, 131 (1997) Doenau, Frauendorf, Zhang, PRC , in preparation

6. Chiral vibration Dynamical (Particle Rotor) calculation

7. Frozen alignment approximation: They are numbers One dimensional - very well suited for analysis.

8. chiral vibration chiral rotation

10. yrast  yrare  in out out in out in in out

11. Chiral vibration Dynamical (Particle Rotor) calculation

12. chiral regime

14. band 2 band 1 134Pr ph11/2 nh11/2

17. Microscopic moments of inertia Irrotational flow Cranking of the core about the 3 axes

20. 19 19 18 18 17 17 16 16 15 15 14 14 13 13 12 12 11 11 10 10 1 1 2 2

22. C. Vaman et al Phys. Rev. Lett. 92, 032501 (2004)

24. Composite chiral band in S. Zhu et al. Phys. Rev. Lett. 91, 132501 (2003)

25. 13 0.18 26 observed 13 0.21 14 observed predicted 13 0.21 40 13 0.21 14 predicted predicted 45 0.32 26 Chiral sister bands Representative nucleus 31/37

26. Chiral vibrator

27. [8] K. Starosta et al., Physical Review Letters 86, 971 (2001)

28. met for several cases. Energy condition Conclusions Left-right coupling (LRC) displaces the two bands LCR makes the transition rates in the two bands somewhat different. Seen in BM1/BE2. Lifetimes needed. LCR distributes the classical transition strength between intraband and interband transitions. Sensitive to details. Inter/Intra not a good indicator for chirality. B(intra)+B(inter) can be compared with classical strength (from TAC). New regions : A=190, A=162 TSD