[en] Soil production and denudation are important and opposing processes that ultimately determine soil formation trajectories and, thus, the landscape. High mountainous areas are geomorphologically active environments and are strongly shaped by the redistribution of sediments and soils. With global warming and the subsequent retreat of glaciers, these processes become increasingly important. New areas having fresh and mostly unweathered glacial till is exposed and soils start to form. The dynamics of soil production and denudation in these high-mountainous landscapes are, however, not yet fully understood. We therefore aimed at exploring the relationship between soil production and denudation at different stages of soil development. This was done by comparing a calcareous and a siliceous soil chronosequence in the central Swiss Alps over the last about 14 kyr. We calculated element mass balances to determine weathering rates and measured short- and long-term erosion rates based on meteoric 239+240Puand10Be. In both chronosequences, the erosion rates were highest in the young soils (on average 5−10 t ha-1 a-1 soil loss). Erosion rates decreased markedly after 3−5 ka of soil development (on average 1−2.5 t ha-1a-1 soil loss) to reach a more or less stable situation after 10−14 ka (on average 0.3–2 t ha-1a-1). Chemical weathering and soil production rates also decreased over time, particularly on the calcareous soil sequence. Depending on the relief and vegetational development, it takes up to 10 ka to reach soil and slope stability. Despite the very high erosion rates, particularly at the start of soil formation, mineral dissolution and transformation reactions are detected and a high rate of organic matter accumulation is measured. Soil production rates reach under such conditions extreme values. In the early stages of soil development, the parent material mainly drives soil formation while at later stages the vegetation becomes more dominant as it promotes surface stability, complex hydrological pathways and chemical weathering that determine water drainage and retention dynamics.

[en] This work is about the experimental study of the efficiency to detect Na (T1) from the well by standard calibration: 241 Am, 57Co, 22 Na, 137 Cs, 54 Mn. The theoretical model was determined to verify the curve obtained in the practice. The efficiency and the use was calculated by the determination of the flux for an experimental nuclear reactor 10 KW

[en] Results obtained in the frame of CERN SPS heavy ion program by experiments involving italian participation and projects for future experiments are presented. The WA97/NA57 Collaboration observed a strangeness production enhancement measuring Λ, Ξ, Ω yields in Pb-Pb collisions. NA50 observed a threshold effect in the anomalous charmonium suppression. Both effects are not accounted for in a purely hadronic scenario, while they find a natural explanation in the formation of a deconfined state of quarks and gluons. The program of experiment NA60, which will probably conclude the CERN SPS activity in the forthcoming years, and of ALICE, which will start data taking in the LHC era, are also highlighted. (author)

[en] Data on the (K^-,π^-) reaction on ²⁷Al and ¹²C are reanalyzed to yield relative angular distributions. Interpretations are given for spectra of the ²⁷Al and ¹²C hypernuclei

[en] Pivoting joints allowing rotation of light guides were developed. Principal features are described. (Auth.)

No abstract available

[en] This chapter describes an experiment in which the Low-Energy Antiproton Ring (LEAR) is used to produce antineutron's in a liquid hydrogen target via the charge exchange reaction p anti p →n anti n. The experiment has been designed in order to measure antineutron production at 0⁰ and to investigate the new physical possibilities offered by antineutron induced reactions. The antineutron momentum is measured by time of flight (TOF) between antiproton arrival at the target and antineutron interaction in the calorimeter. A simple simulation program has been set up to compute the correlation between TOF and antineutron momentum

[en] The strangeness exchange reaction (K^-, π^-) was studied on targets of ¹²C, ¹⁶O and ²⁷Al. The experiment was performed at 390 MeV/c incident K^- momentum and with the π^- emitted in the forward direction (0/20)sub(lab)sup(deg). Formation of various hypernuclear states is observed, corresponding mainly to excited levels. Angular distributions in the forward direction are presented. The results are discussed in the framework of the current theoretical models proposed to describe strangeness exchange reactions and hypernuclear excited states

No abstract available

[en] The authors performed a test of a SCG1-C scintillator glass (Ohara Optical Glass Manufactoring Co., Ltd) at the CERN SC with electrons at energies from 100 to 300 Mev. The block surface was 15 x 15 cm² and its length was 43.5 cm. corresponding to 10 radiation lengths. The energy resolution of the SCG1-C block was measured at five momentum values