[en] New level schemes up to 3 MeV are constructed for ^111,113Cd on the basis of (n, n' γ) and (n, γ) experiments of Baskova et al. More than 40 new levels are introduced in both nuclides in the 1/2-15/2 spin range. Numerous new spin, parity, and multipole mixing ratio values are reported. Antialigned unique-parity states emerging from the coupling of an h_11/2 neutron to core excitations up to 6⁺ spin are identified in both nuclides. The B(E2) values of the 7/2₁^-→11/2₁^- transitions in ^109-119Cd are found to fit a parabola, in contrast to the predictions of the triaxial-rotor-particle model. A group of isolated positive parity states with a decreasing spin sequence, which fulfil the criteria to be intruder states, is also identified. The symmetric particle-plus-rotor model is found to be able to reproduce only a narrow class of levels in ^111,113Cd. States of 9_7/2 and h_11/2 parentage exhibit collective nature, in contrast to those of d_3/2 and d_5/2 parentage. Theoretical reproduction of antialigned states of both parities turned out to be problematic. The disputed location of the lowest-lying photoactivation levels of ¹¹¹Cd is clarified. The binding energy of the last neutron is deduced to be 6975.9(2) keV and 6542.0(2) keV in ¹¹¹Cd and ¹¹³Cd, respectively. (orig.)

[en] Precise K and total internal conversion coefficients for the 1063.6 keV transition as well as γ- and K conversion electron intensity ratios of the 1063.6 and 569.6 keV transitions of ²⁰⁷Pb are derived from earlier measurements. The recommended values are α_K¹⁰⁶³ = 0.0945±0.0022, α_T¹⁰⁶³ = 0.126±0.003, I_γ¹⁰⁶³/Iγ⁵⁶⁹ = 0.758±0.004 and I_e¹⁰⁶³/I_e⁵⁶⁹ = 4.58±0.05. Both internal conversion coefficients deviate slightly from the theoretical values as expected. (orig.)

[en] Sixty-four accurately measured (1σ≤5%) internal conversion coefficients (ICCs) of high multipole-order (E3, M3, E4, M4) gamma-transitions have been compared with the theoretical values of Roesel et al. and Hager and Seltzer. Individual measurements were carefully examined and modified, if necessary. The discrepancies among the experimental values and the Roesel calculations tend to fall within a narrow band and do not reveal any dependence on atomic number, shell or transition energy. However, discrepancies between the experimental data and the calculations of Hager and Seltzer depend on transition energy, viz., increases up to 10% occur when the transition energy approaches the K binding energy. The calculations of Roesel et al. are preferred, and it is proposed that their third and fourth order ICCs are multiplied by factors of 0.975±0.010 and 0.975±0.005 respectively, to give better agreement with the experimental data. The accuracy of the corrected theoretical values is higher than most of the experimental data. This comparison also implies that the recommended source of ICCs and total transition probabilities needs to be reconsidered by the International Nuclear Structure and Decay Data Network. (orig.)

No abstract available

[en] A new approach for the study of ion transport by an in situ radiotracer method is presented. The method is based upon the measurement of the intensity and energy spectrum change of β-radiation during the penetration of labelled species. The applicability of the radiotracer technique is detailed through the measurement of the transport of labeled chloride ions into a PERMAPLEX-A20 anion exchanger membrane. The proposed method is applicable to in situ monitoring of the motion of ions in the membrane (or adsorbent). (author) 17 refs.; 4 figs

[en] A large set of accurately measured E3, M3, E4 and M4 internal conversion coefficients (ICCs) has been compared with various theoretical values. ICCs calculated by considering Dirac-Fock wave functions are found in best agreement with the experimental values, although dependence of their discrepancies on transition energy, multipolarity and parity, as well as on nuclear charge and shell, has been revealed. The ICCs of Roesel et al., after the adjustment of Nemeth and Veres, proved to be the most successful in reproducing the experimental values. The adjusted ICCs of Roesel et al. are recommended and revision of the ICCs and γ-emission probabilities of isomeric transitions in evaluated data compilations such as Nuclear Data Sheets is suggested. Selection from the contradicting K and total ICCs of the 661.66 keV transition of ¹³⁷Ba is proposed. (orig.)

[en] The diopside, jadeite, aegirine-augite and Sr-rich epidote bearing metagabbro, exhumed in individual tectonic blocks in the Carboniferous subduction zone, was in the Western Carpathians revealed along the northern rim of Gemeric unit in localities of Dobsinsky potok, Ostra, Babina, Sajby, as well as in the southern part of the Gemeric unit in the Zadne Porce locality. The primary gabbro age was dated only in the Zadne Porce locality (ca. 461 Ma). This age was recorded by the zircon, which originated by the replacement of baddeleyite during the magmatic stage, where the 'hot magma' was transported by the mantle plume up to the cooler upper mantle. This magmatic process pre-dated the Paleo-Tethyan oceanic riftogenesis in the Paleo-Gemeric zone of the future Western Carpathians in the Devonian. The primary gabbro was cryptocrystalline (diopside and bytownite were not completely crystallized in the upper mantle) and was in Carboniferous (Mississippian; 348 Ma) transported by the mantle fl ow to the slab of subducted lower crust. It is a reason why the REE and trace elements normalized patterns characterize the gabbro formation in the lower crust. Here in the depth of ca 70 km at ca 1100 grad C the gabbro obtained a solidus coarse-grained texture, being characteristic with its unique mineral composition of Ca/Na/Sr-rich feldspar (decomposed to Sr-rich epidote; SrO content reaches up to 14 wt.%), diopside, bytownite, K feldspar, anortoclase, anthophyllite, kearsutite, Mg chromite-chromite and decomposed pseudobrookite/armalcolite. The Zircon regeneration at ca. 307 Ma records the exhumation in subduction channel, where the gabbro blocks underwent hydratation and metamorphism in several successive steps, passing from the epidote-eclogite facies through the blueschist and finally the pumpellyite-actinolite facies. Here the exhumation of individual blocks has stopped. This high pressure metamorphic and exhumation evolution, revealed in all investigated localities, is designated as M1a. In the Ostra locality, besides the ductile deformation and the origin of mylonites, the exhumation of the metagabbro was accompanied also with the origin of tectonic breccia, consisting of metagabbro fragments within the fi ne-grained matrix of the same mineral composition. In localities of Sajby and Dobsinsky potok, the exhumed metagabbro manifests ductile mylonitic/ultramylonitic fabric. In Permian - 261 Ma, the partially exhumed M1a metagabbro blocks were re-metamorphosed from the pumpellyite- actinolite facies to the amphibolite (Babina, Ostra), or epidote-amphibolite facies (Dobsinsky potok, Ostra-breccia, Sajby, Zadne Porce), and subsequent retrograde greenschist facies. This Permian metamorphism, being a product of the overheating above a hot line, accompanied also with the origin of S-type anatectic granites from diff erent protoliths, is designated as M1b. In localities Dobsinsky potok, Sajby and Zadne Porce, the Permian M1b metamorphism strongly overprints older Carboniferous metamorphic-microstructural evolution of M1a, from which only remnant mineral assemblage was preserved. The evidence of polymetamorphism during the exhumation of the metagabbro, having Ordovician magmatic protolith, have contributed to better understanding of the Variscan evolution of the Western Carpathians. The recent positioning of the metagabbro tectonic blocks on the surface was finalized by the Alpine orogenic processes. (authors)

[en] The diamagnetic cavity is the innermost region of the magnetosphere of an active comet, from which the magnetic field is expelled by the outflowing matter. This phenomenon, first detected around comet 1P/Halley, was extensively studied recently by the Rosetta comet chaser mission. Rosetta observed a surprisingly large diamagnetic cavity around comet 67P/Churyumov–Gerasimenko and revealed an unforeseen structure, rich and highly dynamic. Here we present a simple (1+1)-dimensional analytic MHD model of the diamagnetic cavity, which for the first time explains the unexpected size and variability of the cavity. In this model, inward and outward moving time-dependent solutions emerge, featuring distinct differences, in accordance with observations. The plasma density is enhanced in the entire magnetized region. The density enhancement is more pronounced for weak comets, resulting in a stronger interaction and hence the larger than expected cavity. Space weather effects determine the asymptotic plasma speed, thus driving the variations of the plasma properties observed near the cavity.

[en] Activation methods based on (γ,γ') and (n,γ) processes have been developed for investigating gamma and neutron radiation fields around spent fuel assemblies stored in water. Experiments and practical considerations suggested ¹¹⁵In to be selected as a target material both for gamma and neutron activation. Fission product and transuranium content of irradiated fuel can be traced by these methods. The use of (γ,n) conversion in Be or D provides additional tools for analyzing hard gamma components. Results show the suitability of the methods for reactor operational and safeguards purposes. (author)

[en] Novel passive ND methods for burnup monitoring were developed by application of the activation method. Small indium samples were used for detecting neutron and gamma signatures of spent fuel assemblies of a WWR-SM research reactor. Being sensitive to (thermal) neutrons and (hard) gamma radiation, these detectors can provide relative information on actinide and fission product content, respectively. The counting of gamma intensities from neutron-induced ¹¹⁶In^m and gamma-induced ¹¹⁵In^m allowed monitoring of ^242,244Cm as well as of ¹⁴⁴Ce-¹⁴⁴Pr content, respectively. For short cooling times (10 ... 40 d) the gamma signature is due to ¹⁴⁰Ba-¹⁴⁰La, which enables recording fissile content. Because of a two orders of magnitude sensitivity gain to hard gammas, the use of beryllium photoneutron converter is suggested for monitoring ¹⁴⁴Ce-¹⁴⁴Pr content in the 100 ... 1000 d cooling times interval. Axial and azimuthal neutron and gamma profiles were recorded to detect burnup inhomogeneities. (author)