[en] Complete text of publication follows. The on-line nuclear orientation technique was used to study the structures of ¹⁸⁶Pt populated following the decay of ¹⁸⁶Au (T_1/2 = 10.7 min). The orientation of gold nuclei was produced using the hyperfine field in a ferromagnetic host at a low temperature (∼ 15 mK) which was achieved in a ³He-⁴He dilution refrigerator. The directional distributions of γ-rays were measured by high resolution Ge(Li) detectors. With these measurements unique spin-parity assignments were made to most of the populated levels in ¹⁸⁶Pt and the multipole mixing ratios of many mixed transitions were obtained. The structure of ¹⁸⁶Pt was examined using the neutron-proton interacting boson approximation (IBA-2). The energy levels were fitted, and the mixing ratios of some selected transitions were calculated and compared with the experimental results. The set of model parameters indicates that ¹⁸⁶Pt has a structure intermediate between the γ-soft, O(6), and rotational, SU(3), limits of the IBA. (author)

[en] The low temperature nuclear orientation facility KOOL was used for a systematical study of the very neutron-deficient Au isotopes where the on-line technique is compulsory due to the short lifetimes involved. The measurement of the magnetic moment of the 4.6 min ¹⁸⁹Au 11/2^- isomer, a preliminary result on the same state in tsub(1/2) = 0.9 sec ¹⁹¹Au and the moment value of the tsub(1/2) = 10.7 min ¹⁸⁶Au 3^- ground state is reported. Several spins and mixing ratios in ¹⁸⁹Pt, ¹⁸⁶Pt and ¹⁹¹Au have been determined as well

[en] Gamma-gamma and gamma-electron coincidence data have been taken for the transitions observed in the decay of ¹⁸⁶Au to ¹⁸⁶Pt. Sources of ¹⁸⁶Au were produced by the ¹⁸¹Ta(¹²C,7n) reaction at the Holifield Heavy Ion Research Facility and mass separated using UNISOR. We identify several electric monopole (E0) transitions. Of particular interest is a pure E0 transition between two 3⁺ states. These states are members of two coexisting low-lying K^π = 2⁺ bands. The results will be discussed in the context of shape coexistence and nuclear deformation

[en] We report the first on-line measurements of quadrupole-interaction-resolved nuclear magnetic resonance on oriented nuclei. The 10-min ¹⁸⁶Au activity was obtained as daughter after cold implantation of mass-separated ¹⁸⁶Hg into a hcp Co single crystal at the NICOLE facility at ISOLDE-3 (CERN). The quadrupole interaction of ¹⁸⁶AuCo(hcp) was fully resolved, and the spectroscopic quadrupole moment of ¹⁸⁶Au was determined to be Q=+3.12(20) b. This implies β₂=+0.246(16), proving the large prolate deformation of the ¹⁸⁶Au ground state

[en] The high-spin level structure of ¹⁸⁶Au is re-investigated by means of in-beam γ-ray spectroscopy via the ¹⁷²Yb(¹⁹F, 5nγ)¹⁸⁶Au reaction. The oblate bands previously reported are revised and extended to higher-spin states. A new I^π = (20⁺) excited state has been identified and assigned to the πh_11/2^-1 ⊗νi_13/2^-2h_9/2^-1 configuration. The total Routhian surface and cranked shell model calculations suggest that the πh_11/2^-1 ⊗νi_13/2^-2h_9/2^-1 band in ¹⁸⁶Au has a non-axial deformation. (authors)

[en] The nuclear spins of some neutron deficient gold isotopes have been measured using the atomic-beam magnetic resonance method. The following results have been obtained:¹⁸⁶Au (10.7 min)I=3, ¹⁸⁷Au(8.5 min)I=1/2, ¹⁸⁸Au(8.8 min)I=1 ¹⁸⁹Au(28.3 min)I=1/2 and sup(189m)Au(4.6 min)I=11/2. The spins of these typical transitional nuclei are discussed briefly in terms of various nuclear models. (Auth.)

No abstract available

[en] Low-spin states of ¹⁸²Ir populated through the β⁺/EC decay of ¹⁸²Pt were studied using the ISOCELE facility. A low-spin level scheme has been established. Using a semi-microscopic rotor-plus-two-quasiparticle model developed in the context of the HF+BCS approximation the influence of the V_p-n interaction on the relative energy location of excited states has been studied and the low-spin states located at low energy in ¹⁸²Ir have been identified. The α-decay energy of ¹⁸⁶Au has been corrected to 4907±16 keV. (author) 62 refs.; 13 figs.; 2 tabs

[en] The transitional doubly-odd iridium nuclei with A = 184 and 186 have been studied from the β⁺/EC decay of the corresponding platinum isotopes using the on-line mass separator ISOCELE. Configurations can be reasonably Attributed to the low-lying states of /sup 184/Ir in agreement with results already known. On the other hand an E3 transition observed in /sup 186/Ir suggests that the known long-lived 1.7h 2^- state is located at 137.5 keV above the 16h 5⁺ state, raising questions about structure of this latter state

[en] Hyperfine structure HFS have been recorded for Au with A=191 and 186 using PILIS II (Post-ISOCELE Laser Isobar Separation) apparatus. The quadrupole moment values obtained yield decisive information on gold nuclear shape