Tilted axis rotation, candidates for chiral bands, and wobbling motion in 138 Nd

摘要: High-spin states in ${}^{138}$Nd were investigated using the reaction ${}^{94}$Zr(${}^{48}\mathrm{Ca},4n$), detecting coincident $\ensuremath{\gamma}$ rays with gasp spectrometer. A rich level scheme was constructed including four bands of negative parity at low spins, eight dipole transitions, and quadrupole transitions medium spins. The cranked shell model tilted-axis cranking are used to assign configurations observed bands, where zero pairing is assumed. For selected case finite also considered. consistent notation for configuration assignment that applies both introduced. interpreted as rotation around short long principal axes (quadrupole bands), well a tilted axis (dipole bands). have an intermediate character, between magnetic collective electric rotation. pair identified candidates chiral partners. possible existence wobbling mode deformation spins discussed. interpretation multitude strongly supports stable triaxial ${}^{138}$Nd.