Evidence of transverse wobbling motion in 151Eu

Transverse wobbling was investigated in the 151Eu nucleus by populating the excited states using 148Nd(7Li, 4n)151Eu at a beam energy of 30 MeV. Three new interconnecting transitions have been placed between the two negative parity bands. The M1/E2 character of the interconnecting AI =1 transitions between the negative parity bands was extracted from the mixing ratios using the RDCO and linear polarization method. The spin and parity of the states of different bands have also been assigned. The dominant E2 character of the interlinking transitions between the yrast and first phonon wobbling band and the dominant M1 character between the yrast band and its signature partner band indicate the presence of transverse wobbling in the 151Eu nucleus. It is further demonstrated that the triaxial projected shell model approach describes the observed experimental properties.

Automated summary

Transverse wobbling in the 151Eu nucleus was studied by exciting the excited states using the 148Nd(7Li, 4n)151Eu reaction at a beam energy of 30 MeV. Three new interconnecting transitions were found between the negative parity bands. The M1/E2 character of these transitions was determined using the mixing ratios and the RDCO and linear polarization method, and the spin and parity of different bands were assigned. The dominant E2 character between the yrast and first phonon wobbling band and the dominant M1 character between the yrast band and its signature partner band indicate the presence of transverse wobbling in the 151Eu nucleus. The observed experimental properties were successfully described using the triaxial projected shell model approach.