SSNET 6-12 November 2016 Magnetic dipole moment of chiral bandhead in 128 Cs E. Grodner Faculty of Physics, University of Warsaw J. Srebrny HIL, University of Warsaw Zakład Fizyki Jądrowej HIL (WARSAW) LNL INFN (ITALY) IPN (ORSAY) NIPNE (ROMANIA)
Nuclear chirality - observables SSNET 6-12 November 2016
Nuclear chirality - observables Cs, La SSNET 6-12 November 2016 Lifetime results from the DSA experiments – warsaw cyclotron Partner bands populated in fusion evaporation reaction M1 interband transitions yrast->side observed in 126 Cs Energy separation in Cs Isotopes around 150 keV configuration E.G. et al., 128 Cs as the best example revealing the chiral symmetry breaking phenomenon Phys. Rev. Lett. 97 (2006) 172501
Nuclear chirality - observables Cs, La SSNET 6-12 November 2016
EAGLE SSNET 6-12 November 2016 J.Mierzejewski et al., Nucl. Instr. and Meth. A 659, 84 (2011);
SSNET 6-12 November 2016 E.G. et al., 128 Cs as the best example revealing the chiral symmetry breaking phenomenon Phys. Rev. Lett. 97 (2006) 172501 E.G. et al., Partner bands of 126 Cs – first observation of chiral electromagnetic selection rules Phys. Lett. B703 (2011) 45 Is there an observable more directly realted to the geommetry of the three angular momenta vectors?
G-factor (3-components) SSNET 6-12 November 2016
SSNET 6-12 November 2016 Chiral configuration intermediate value of g-factor
SSNET 6-12 November 2016 Planar (non-chiral) configuration maximum value of g-factor
SSNET 6-12 November 2016 Opposite planar (non-chiral) configuration minimum value of g-factor
SSNET 6-12 November 2016
G-factor and handedness SSNET 6-12 November 2016
G-factor and handedness SSNET 6-12 November 2016
measurement, TDPAD SSNET 6-12 November 2016 How to measure g ? Initial spin alignment. Angular distribution of the gamma radiation External magnetic field B… ... Interacts with the magnetic moment TANDEM, ALTO facility Spin precession ORSAY TDPAD method
measurement, TDPAD SSNET 6-12 November 2016 How to measure g ? Initial spin alignment. Angular distribution of the gamma radiation External magnetic field B… ... Interacts with the magnetic moment TANDEM, ALTO facility Spin precession ORSAY TDPAD method
TDPAD requirements SSNET 6-12 November 2016 TDPAD requirements Timing HPGe Strong external field B Pulsed beam Long level lifetime (around 100ns)
External B-field – GAMIPE chamber SSNET 6-12 November 2016 GAMIPE chamber NIPNE (Rromania) Fe Poles, 300% B field amplification
Oscillating intensities SSNET 6-12 November 2016
Quantum coupling 3 angular momenta SSNET 6-12 November 2016 SINGLE-COUPLING SCHEMES
Quantum coupling 3 angular momenta SSNET 6-12 November 2016 SINGLE-COUPLING SCHEMES
g=0.59 SSNET 6-12 November 2016 g=0.5980(5)
No planar solutions? SSNET 6-12 November 2016 Quantum single-coupling schemes Always maximally chiral ?!
No planar solutions? SSNET 6-12 November 2016 Quantum single-coupling schemes Always maximally chiral ?! 2010 -> 2016
Did we choose a special set of coupling? SSNET 6-12 November 2016
Did we choose a special set of coupling? SSNET 6-12 November 2016
Closer to semi-classical picture SSNET 6-12 November 2016
CONCLUSION: non-chiral configuration! SSNET 6-12 November 2016 j p x j n x R=0 g=0.5 j p x j n x R=2 g=0.65 j p x j n x R=4 g=0.80 Eksperyment g=0.59 The chiral bandhead is NON- CHIRAL
SSNET 6-12 November 2016 M.Kowalczyk, M.Kisieliński , J.Srebrny , L. Próchniak ŚLCJ WARAW UNI. E.Grodner INFN PADOVA C. Ur, F. Recchia AKSARAY, INFN S. Aydin IPN ORSAY G. Georgiev, E. Fiori, R. Lozeva NIPNE M. Bujor ZFJ Ch. Droste ZTJA G. Rohoziński ŚLCJ L.Próchniak Beihang UNI. J. Meng, Q. B. Chen ,S. Zhang,L. F. Yu , P. Zhao
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