Bonn 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 42: Struktur und Dynamik von Kernen VII

HK 42.7: Vortrag

Donnerstag, 18. März 2010, 15:30–15:45, HG II

Investigation of chiral bands in 106AgEvgenia Lieder1,2, •Rainer Lieder1, Rob Bark1, Elena Lawrie1, Kobus Lawrie1, Sifiso Ntshangase1, Simon Mullins1, Paul Papka1, Ntombi Kheswa1, Jie Meng3,4, Bin Qi5, Shuangquan Zhang3, and Zhipan Li31iThemba LABS, Somerset West, South Africa — 2FhG, INT, Euskirchen, Germany — 3PhS, PKU, Beijing, China — 4PhS, BUAA, Beijing, China — 5SDU, Weihai, China

Dipole bands in 106Ag have been studied with the γ-detector array AFRODITE at iThemba LABS, South Africa. A 96Zr(14Nd,4n)106Ag reaction at a beam energy of 71 MeV has been used. The three previously known negative-parity bands in 106Ag have been extended. Bands 1 and 2 were proposed to be chiral partner bands [1]. However, in view of the present results, bands 2 and 3 seem to be better candidates for chiral partner bands since their staggering parameters, B(M1)/B(E2) ratios, kinematic moments of inertia and quasiparticle alignments agree much better than those of bands 1 and 2. Triaxial relativistic mean field (RMF) and particle-rotor model (PRM) calculations support this interpretation. In the potential energy surface of 106Ag, obtained in RMF calculations, two minima have been found in the β2−γ plane. Based on PRM calculations using the deformation parameters of the two minima and a ν h11/2⊗π g9/2−1 particle-hole configuration, bands 2 and 3 may represent partners with chiral vibration at γ ≈ 12. Band 1, located in the other minimum, may be a magnetic dipole band or the partner of a second pair of chiral bands.

[1] P. Joshi et al., Phys. Rev. Lett. 98, 102501 (2007)

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2010 > Bonn