No abstract available

[en] The higher-lying states in ²⁰⁵Pd (E/sub x/ > or = 2.57 MeV) are examined by means of the ²⁰⁴Pb(d, p) transfer reaction at incident energies of 13.0 and 20.0 MeV. In order to extract a reliable set of spectroscopic factors, a consistent set of distorted-wave Born approximation parameters is derived from analyses of new ²⁰⁸Pb(d, p) data at E/sub d/ = 13.0 MeV, and by reanalysis of earlier ²⁰⁶/sub,/²⁰⁸Pb(d, p) data. By avoiding proton optical parameters based on data in an energy region later found to contain resonances, and by using a deuteron potential which corrects for deuteron breakup, ²⁰⁸Pb(d, p) spectroscopic factors consistent to +- 15% are obtained. The improved distorted-wave Born approximation parameters are used to assign orbital angular momentum (l/sub n/) values to a majority of 110 new levels in ²⁰⁵Pb, most of them heretofore unknown. Significant fractions of the 1i₁₁/₂ and the 1j₁₅/₂, and the majority of the 2g₉/₂, 3d₅/₂, 4s₁/₂, 2g₇/₂, and 3d₃/₂ single-particle strengths are located. These strengths are found to be concentrated about the energy centroids. A previous theoretical calculation of spectroscopic strengths compares poorly with the experimental values

No abstract available

[en] Inelastic scattering of deuterons from a radioactive target of ²⁰⁵Pb have been measured at deuteron energies of 14 and 17 MeV. The reaction products were analysed in the Niels Bohr Institute multiangle spectrograph. Multiplets associated with the couplings of the single-neutron hole states to 3^- and 2⁺ core states were populated in the reaction. The multiplet associated with the 3^- state contains at least eleven members. The total L=3 strength observed is the same as for the neighbouring even nuclei with a spread of less than 230 keV. The L=2 strength is distributed over a larger energy interval and strongly influenced by mixing and blocking effects. The measured angular distributions were analyzed with standard DWBA calculations and deformation parameters βsub(L)² were deduced. (Auth.)

[en] The s-process production ratio of ²⁰⁴Pb and ²⁰⁵Pb, which is of importance for the ²⁰⁵Pb-²⁰⁵Tl chronometry, is calculated in two schematic s-process models. Special emphasis is put on the role of the bound-state β^--decay of ²⁰⁵Tl which has been totally overlooked in previous studies. It is shown that the ²⁰⁵Pb production under certain s-process conditions might be large enough to justify a renewed search for extinct ²⁰⁵Pb in meteorites. The influence of uncertainties in the input quantities (electron capture Q-value and ft values) on the results is also discussed. (orig.)

[en] The spectrum of ²⁰⁵Pb is studied with ²⁰⁴Pd(d, p) transfer reaction at incident energies of 13.0 and 20.0 MeV. Angular distributions are obtained for 15 of the known single-hole fragments in ²⁰⁵Pb below an excitation energy of 2.56 MeV. Spectroscopic strengths are extracted and these results compared with three theoretical calculations. Two of these reproduce the total spectroscopic strengths and centroid energies for the neutron hole states rather well

No abstract available

[en] Lorex experiment provides the method for solar neutrino flux measurement on the basis of the ²⁰⁵Tl(ν,e^-)²⁰⁵Pb reaction in the lorandite mineral samples from Allchar, using AMS techniques. Multiple energy loss technique is relevant for identification of ²⁰⁵Pb ions and long living ¹⁰Be, ²⁶Al, ³⁶Cl and ⁵³Mn nuclei in geological samples prepared from Iorandite and monitoring minerals such as realgar and marcasite. The results of the study of the effective charge distributions and differences in isobar energy losses as well as their comparison with energy-loss straggling in the gases relevant for isobar separation are reported

[en] Possible signatures of the presence of nuclear six-quark bags are discussed. 8 refs., 1 tab

[en] Abstract only