Single-step link of the superdeformed band in143Eu

²⁰⁹Fr has been produced by irradiation of¹⁹⁷Au with¹⁶O,and studied using a He-jet recoil tape transport system.A decay scheme is proposed for the first time,based on X-γ and γ-γ coincidence measurements,which takes account of 20 observed γ-rays. The branching ratio for (EC+β ⁺) decay of²⁰⁹Fr has been estimated to be 3.0±1.5%. Five members of low-lying states in²⁰⁹Rn can be explained with the configuration [(²¹⁰Rn 2⁺)(νf5/2)^?1].     

Scars of discrete rotational bands in hot nuclei

Rotational motion loses its coherence as a function of the nuclear internal excitation energy. The damping process does not proceed in a continuous fashion and scars of discrete rotational bands are found, inbedded in a background of damped rotational states, regardless whether the calculations are carried out using effective or “random” forces. The complexity of the damping mechanism is revealed in the lineshape of the ridges in theγ-γ correlation spectrum.     

On lower semicontinuity in BH and 2-quasiconvexification

It is proved that if , with p > 1, if is bounded in , , and if in then provided is 2-quasiconvex and satisfies some appropriate growth and continuity condition. Characterizations of the 2-quasiconvex envelope when admissible test functions belong to BH^p are provided. Received: 10 October 2001 / Accepted: 8 May 2002 / Published online: 17 December 2002     

Synthesis of 8,9-dihydrodipyrazolo[3,4-b:4′,3′-f][1,5]diazocin-10(1H)-one. A new ring system

8,9-Dihydrodipyrazolo[3,4-b:4′,3′-f][1,5]diazocin-10(1H)-ones 7 were prepared by cyclization of 1-ethyl-N,3-dimethyl-4-acetamido-N-(1-R₁-3-R₂-1H-pyrazol-5-yl)-1H-pyrazole-5-carboxamides 6 by a Bischler-Napieralski cyclization. A complete assignment of the chemical shifts to the carbon atoms of compound 7 was performed by different nmr experiments, such as DEPT and XHDEPT for one? bond C? H correlations and COLOC experiments for long-range C-H correlations.     

Simultaneous Determination of Caffeine and Acetylsalicylic Acid in Pharmaceutical Formulations Using a Boron‐Doped Diamond Film Electrode by Differential Pulse Voltammetry

This work presents a simple, fast and low‐cost method for simultaneous determination of acetylsalicylic acid (ASA), without alkaline hydrolysis and caffeine (CF) in pharmaceutical formulations using a boron‐doped diamond as the working electrode through differential pulse voltammetry. A good repeatability was reached for 20 measurements, with a low relative standard deviation of less than 1.0 %. The calibration curves presented a great linear correlation coefficient for both drugs (R=0.999) with a limit of detection of 1.6×10^?7 mol L^?1 for CF and 2.3×10^?7 mol L^?1 for ASA. The system was validated in comparison with the official method.     

Influence of strain on the Stark effect in InP/GaInP quantum discs

In InP/GaInP quantum discs it is shown that strain induces a type I to type II transition with increasing thickness of the disc. When an external electric field is applied along the cylindrical axis of the disc, the exciton energy exhibits a Stark effect, which for the light hole exciton becomes linear even for a small field value, while for the heavy hole it is more quadratic.     

Chemical cleaning of encrustations on archaeological ceramic artefacts found in different Italian sites

With the aim of contributing to the knowledge of north-Mesopotamian Bronze Age pottery production (3rd millennium BC, early Dynastic and early Akkadian period), the mineralogy of pottery excavated from the site of Tell Beydar (Syria) has been studied in order to make inferences concerning the clay preparation and firing techniques of that period. The fired pottery finds have been classified by archaeologists into three distinct groups on the basis of their aesthetic and visual appearance and their mechanical strength: standard, cooking and “metallic” ware. SR X-ray powder diffraction data have been collected from 100 individual shards as well as from local clays and one unbaked object, an inscribed tablet. The XRD data is supplemented by SEM-EDS, XRF and polarising microscopy studies of 200 polished thin sections. The synthesis of the results from this extensive study quantifies the basic physical characteristics of the ensemble: the standard ware required no specific clay preparation and firing procedures. The body of the cooking ware contains large inclusions which result in a body texture intended to make them resistant to repeated thermal cycles. Both standard and cooking ware are made of a calcareous clay, typical of pottery from the Middle East. The metallic ware, however, are of a much finer quality with a distinctly different mineralogy than the other two groups. PACS 81; 81.05.Je; 81.05.Mh; 82.80.Ej