[en] The decay of on-line mass-separated ¹¹⁴Rh has been studied by γ spectroscopy. A definite odd parity and a probable I=7 are deduced for the high-spin β-decaying level. The 1116 keV and 1392 keV levels in the ¹¹⁴Pd daughter nucleus are candidates for the bottom of the β band. There is no support for a previously reported very-low-lying 0⁺ level at 871 keV. A K=4 band built on the new level at 1639 keV is proposed. The lowest-lying two-quasiparticle levels in ¹¹⁴Pd are calculated in the framework of the quantum Monte Carlo pairing model using deformed shell model states. The lowest configurations are associated with an oblate minimum of the potential energy

[en] High-spin excited states in the very neutron-rich nucleus ¹¹⁴Rh have been studied by examining the prompt γ rays emitted in the spontaneous fission of ²⁵²Cf with the Gammasphere detector array. A high-spin level scheme of ¹¹⁴Rh has been established for the first time with 13 new levels. The level scheme is proposed to be built on a 7^- state. The existence of a relatively large signature splitting and an yrare band show features which may indicate triaxial deformation. The phenomenon of signature inversion has been observed in ¹¹⁴Rh at I=12 (ℎ/2π). The observed signature inversion of ¹¹⁴Rh is interpreted successfully in terms of the triaxial projected shell model. Theoretical calculations suggest that the negative-parity, yrast band of ¹¹⁴Rh has the two-quasi-particle configuration of πg_9/2 x νh_11/2, consistent with the systematics of odd-odd Rh isotopes. The signature inversion at spin 12 (ℎ/2π) may be attributed to the change of rotational mode, from quasi-particle aligned rotation at low spins to collective rotation at high spins.

[en] This evaluation for A=114 updates one by J. Blachot and G. Maguier. The present evaluation for A=114 is published in update mode (a format recommended by the editors whenever large blocks of information duplicate earlier entries). This update incorporates experimental data which have appeared in the literature since the previous full evaluation. In addition to the publication of new and revised data sets, complete adopted level and gamma-ray information is given for all isobars of A=114. The update, in conjunction with the 1990 evaluation, provides a complete evaluation

[en] The present work describes the measuring of Q_β values of β-instable isotopes of Tc, Ru, Rh and Pd. The mass range A=110 to 117 comprises neutron-rich, short-living isotopes. Due to their small (fission) abundances, few data are known, especially regarding level schemes or gamma radiation. The proton-induced fission and a fast online mass separation was used to produce these nuclides in the IGISOL facility located in Jyvaeskylaein Finland. The β,γ,X coincidence apparatus used during the experiments allows measuring Q_β values as well as γ,X coincidences. The latter represent the basic input data for a calculation of Q_β values out of β,γ coincidences. It is so possible to examine nuclides with incomplete level schemes; similarly, these level schemes can be extended using beta,gamma coincidence data. Twelve Q_β values of neutron-rich Tc to Pd isotopes could be determined, yielding nuclear masses, mass defects and neutron separation energies. Eight of them were determined for the first time; another one could be confirmed. For three more, the error of earlier values could be decreased by a factor of nearly ten. The resulting data are of interest for the review of nuclear mass models, they represent also input in astrophysical network calculations. (orig.)

[en] This evaluation for A = 114 updates one by J. Blachot (2002Bl20), published in Nuclear Data Sheets 97, 593 (2002). Previous: 1995Bl09, 1990Bl05, 1982Bl18. Decay scheme of Tc-114 to Ru-114 seems incomplete. The decay scheme of 6.2-s isomer in I-114 seems very poorly known, and for the 2.1-s activity not well known either. None of these is published in a primary paper.

[en] Beta decay of neutron-rich even-mass 114-118Rh and 116-120Ag isotopes has been studied using on-line mass-separated sources that were produced by applying 25 MeV proton induced symmetric fission of natural uranium at the IGISOL facility. The β-γ and γ-γ coincidence spectroscopy is employed in all cases that enables for the construction of the decay scheme and for the deduction of the decay properties. Systematics for two-quasineutron states in 114,116,118Pd and for three-phonon multiplet in 114,116,118Cd are presented and discussed

[en] The energy levels of even ^110-116Pd nuclei have been studied from β-decays of odd-odd ^110-116Rh isotopes produced at the on-line isotope separator IGISOL. Two β-decaying states with I^π = 1⁺ and I ≥ 4 have been identified in all the cases. New level schemes with preliminary spin assignments have been constructed for ¹¹²Pd, ¹¹⁴Pd and ¹¹⁶Pd. Similarities with the level structures of their Xe isotones have been pointed out. (orig.)

[en] New results on a very neutron-rich ¹¹⁴Ru isotope are discussed. A half-life of 0.57(5) s was determined and six γ-rays were observed to belong to this decay, five of which were placed in the decay scheme of ¹¹⁴Ru. Three conversion coefficients were measured experimentally. The beta feeding pattern of ¹¹⁴Ru has been determined and log ft values are deduced. Q_β values of 1.35(6) and 6.1(2) MeV have been measured for the decay of ¹⁰⁸Ru and ¹¹⁴Ru. Systematics of decay energies of even neutron-rich Ru isotopes are presented and compared to the various mass predictions. Beta strength of ¹¹⁴Ru is discussed in the framework of the deformed single-particle model. (orig.)

[en] Single beta decay transitions in ^114-120Pd are calculated. Theoretical β⁺ and β^- strength distributions, for transitions to 1⁺ states in the nuclei ^114-120Ag and ^114-120Rh, are obtained in the framework of the quasiparticle random phase approximation (QRPA). The effective two-body interaction which is used in the calculations is constructed from the Bonn one-boson-exchange potential (OBEP). Particle-hole and particle-particle like channels of the two-body force are included in the definition of the QRPA matrix equations. Effects associated with the particle number violation of the quasiparticle mean field are accounted for by using a particle-number-projected version of the QRPA formalism. Theoretical strength distributions for the β^- and β⁺ branches are shown and compared with data. (orig.)