6533b7d4fe1ef96bd126350e

RESEARCH PRODUCT

Signatures of oblate deformation in the ^{111}Tc nucleus

subject

description

Monoisotopic samples of exotic, neutron-rich ${}^{111}$Mo nuclei, produced in the deuteron-induced fission of ${}^{238}$U and separated using the IGISOL3 isotope separator, coupled to the JYFLTRAP Penning trap, were used to perform $\ensuremath{\beta}$- and $\ensuremath{\gamma}$-coincidence spectroscopy of ${}^{111}$Tc. New excited levels in ${}^{111}$Tc populated in ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of ${}^{111}$Mo provide the first indication for an oblate deformation in the mass $A\ensuremath{\approx}110$ region. The wide spin range of levels populated in ${}^{111}$Tc following the decay of ${}^{111}$Mo indicates the existence of two $\ensuremath{\beta}$-decaying levels in ${}^{111}$Mo. The Q${}_{\ensuremath{\beta}}$ value of the ${}^{111}$Mo ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay was determined experimentally for the first time.