K=0 M1 Excitation Strength of the Well-Deformed Nucleus ^{164}Dy from K Mixing. Academic Article uri icon

abstract

  • The size of a K=0 M1 excitation strength has been determined for the first time in a predominantly axially deformed even-even nucleus. It has been obtained from the observation of a rare K-mixing situation between two close-lying J^{}=1^{+} states of the nucleus ^{164}Dy with components characterized by intrinsic projection quantum numbers K=0 and K=1. Nuclear resonance fluorescence induced by quasimonochromatic linearly polarized -ray beams provided evidence for K mixing of the 1^{+} states at 3159.1(3) and 3173.6(3)keV in excitation energy from their -decay branching ratios into the ground-state band. The K=0 transition strength of B(M1;0_{1}^{+}1_{K=0}^{+})=0.008(1)_{N}^{2} was inferred from a mixing analysis of their M1 transition rates into the ground-state band. It is in agreement with predictions from the quasiparticle phonon nuclear model. This determination represents first experimental information on the M1 excitation strength of a nuclear quantum state with a negative R-symmetry quantum number.

published proceedings

  • Phys Rev Lett

altmetric score

  • 1

author list (cited authors)

  • Beck, T., Werner, V., Pietralla, N., Bhike, M., Cooper, N., Friman-Gayer, U., ... Zilges, A.

citation count

  • 5

complete list of authors

  • Beck, T||Werner, V||Pietralla, N||Bhike, M||Cooper, N||Friman-Gayer, U||Isaak, J||Jolos, RV||Kleemann, J||Papst, O||Tornow, W||Bernards, C||Crider, BP||Ilieva, RS||Löher, B||Mihai, C||Naqvi, F||Pascu, S||Peters, EE||Prados-Estevez, FM||Ross, TJ||Savran, D||Vanhoy, JR||Zilges, A

publication date

  • August 2020