22 research outputs found
Mass discrimination using double-sided silicon microstrip detectors for pions and protons at intermediate energies
Prototype silicon detector modules for the vertex detector of the FINUDA experiment were tested at TRIUMF using pions and protons at 270 and 408 MeV/c in order to study their use for mass discrimination based on energy deposition. The detector modules were constructed using double-sided silicon detectors based on the ALEPH design, read out by VA1 integrated circuits. The test modules and apparatus are described, details of the data analysis are discussed, and the results are presented together with GEANT simulations. Particular attention is given to the detector response for the various particles, with signals ranging from the minimum-ionising pions at 408 MeV/c up to 20 times minimum-ionising for the protons at 270 MeV/c. ( 1999 Elsevier Science B.V. All rights reserved
Correlated pairs from the reaction
Correlated pairs emitted after the absorption of negative kaons
at rest in light nuclei and are
studied. -hyperons and deuterons are found to be preferentially
emitted in opposite directions. The invariant mass spectrum of
shows a bump whose mass is 32516 MeV/c. The bump mass (binding
energy), width and yield are reported. The appearance of a bump is discussed in
the realm of the [] clustering process in nuclei. The experiment was
performed with the FINUDA spectrometer at DANE (LNF).Comment: 13 pages, 5 figures, accepted for publication in Phys. Lett.
The reaction on p-shell nuclei
This letter is concerned with the study of the reaction in p-shell nuclei, i.e., , ,
and . The emission rates are
reported as a function of . These rates are discussed in comparison with
previous findings. The ratio in p-shell nuclei is
found to depart largely from that on hydrogen, which provides support for large
in-medium effects possibly generated by the sub-threshold . The
continuum momentum spectra of prompt pions and free sigmas are also discussed
as well as the missing mass behavior and the link with the
reaction mechanism. The apparatus used for the investigation is the FINUDA
spectrometer operating at the DANE -factory (LNF-INFN, Italy).Comment: 14 pages, 5 figures, accepted for publication in Phys. Lett.
Correlated pairs from the absorption of at rest in light nuclei
Novel data from the absorption reaction in light nuclei
Li and Be are presented. The study aimed at finding
correlations. Regardless of , the pairs are preferentially
emitted in opposite directions. Reaction modeling predominantly assigns to the
direct reactions the emission of the
pairs whose yield is found to range from to .
The experiment was performed with the FINUDA spectrometer at DANE (LNF).Comment: 11 pages, 5 figures, accepted for publication in Phys. Lett.
Endogeneity in the Relation between Poverty, Wealth and Life Satisfaction
This publication concentrates on the complex interplay between poverty, wealth and life satisfaction. Main areas of life are quantified in a multidimensional approach of poverty and wealth: Individual income, current health, occupational autonomy or employment status and also the mentioned life satisfaction. Data used in this publication were made available by the German Socio Economic Panel Study (SOEP) at the German Institute for Economic Research (DIW Berlin), Berlin. A period from 1998-2009 is examined. This study has two main goals: (1) To contribute to the interconnection between poverty, wealth and life satisfaction. (2) Besides, the endogeneity research regarding life satisfaction should be expanded. Reduced form vector-autoregressions (with first differences) were used to answer the questions. Therefore, granger-causality can be supposed. Major findings: An initial rise in life satisfaction can improve income and health, but not job autonomy. However, even the probability of returning from unemployment to employment can increase. Gender-specific differences are discussed.Der Fokus dieser Arbeit liegt auf der komplexen Wechselwirkung zwischen Armut, Reichtum und Lebenszufriedenheit. Die Konzentration gilt zentralen Bereichen des Lebens: Individuelles Einkommen, subjektiver Gesundheitszustand, berufliche Autonomie bzw. Erwerbstätigkeit sowie der angesprochenen Lebenszufriedenheit. Die Daten dieser Publikation beruhen auf Zahlen des Soziooekonomischen Panels (SOEP) am Deutschen Institut für Wirtschaftsforschung (DIW Berlin), Berlin. Es wird ein Zeitraum von 1998-2009 betrachtet. Dadurch wird überwiegend ein Beitrag zur Endogenitätsfrage geleistet und das verzweigte Zusammenspiel dieser Größen abgebildet. Methodisch wird dazu auf Reduced Form Vektorautoregressionen (mit First Differences) zurückgegriffen. Granger-Kausalität kann angenommen werden. Zentrale Ergebnisse: Ein anfänglicher Anstieg der Zufriedenheit erhöht das individuelle Einkommen sowie den Gesundheitszustand, aber nicht die berufliche Autonomie. Hingegen kann sich die Wahrscheinlichkeit erhöhen, dass man von einer Arbeitslosigkeit zurück in die Vollerwerbstätigkeit gelangt. Diskrepanzen zwischen den Geschlechtern werden diskutiert
First Results on 12Lambda-C production at DAPHNE
Lambda-hypernuclei are produced and studied, with the FINUDA spectrometer,
for the first time at an e+e- collider: DAPHNE, the Frascati phi-factory. The
slow negative kaons from phi(1020) decay are stopped in thin (0.2 g/cm^2)
nuclear targets, and Lambda-hypernuclei formation is detected by measuring the
momentum of the outgoing pi^-. A preliminary analysis on 12Lambda-C shows an
energy resolution of 1.29 MeV FWHM on the hypernuclear levels, the best
obtained so far with magnetic spectrometers at hadron facilities. Capture rates
for the ground state and the excited ones are reported, and compared with
previous experiments.Comment: 15 pages, 5 figures. v2: one reference updated. Accepted for
publication in Phys. Lett.