Abstract
The nucleus Gd154 is located in a region of the nuclear chart where rapid changes of nuclear deformation occur as a function of particle number. It was investigated using a combination of γ-ray scattering experiments and a γγ-coincidence study following electron capture decay of Tbm154. A novel decay channel from the scissors mode to the first excited 0+ state was observed. Its transition strength was determined to B(M1;1+sc→0+2)=0.031(4)μ2N. The properties of the scissors mode of Gd154 imply a much larger matrix element than previously thought for the neutrinoless double-β decay to the 0+2 state in such a shape-transitional region. Theory indicates an even larger effect for Nd150.
Original language | English |
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Article number | 172501 |
Journal | Physical Review Letters |
Volume | 111 |
Issue number | 17 |
DOIs | |
Publication status | Published - 1 Oct 2013 |
Keywords
- beta-decay
- nuclei
- neutrinos