15 research outputs found
S-35 Beta Irradiation of a Tin Strip in a State of Superconducting Geometrical Metastability
We report the first energy loss spectrum obtained with a geometrically
metastable type I superconducting tin strip irradiated by the beta-emission of
S-35. (Nucl. Instr. Meth. A, in press)Comment: Compressed PostScript (filename.ps.Z), 9 pages, 2 figure
Planck scale effects in neutrino physics
We study the phenomenology and cosmology of the Majoron (flavon) models of
three active and one inert neutrino paying special attention to the possible
(almost) conserved generalization of the Zeldovich-Konopinski-Mahmoud lepton
charge. Using Planck scale physics effects which provide the breaking of the
lepton charge, we show how in this picture one can incorporate the solutions to
some of the central issues in neutrino physics such as the solar and
atmospheric neutrino puzzles, dark matter and a 17 keV neutrino. These
gravitational effects induce tiny Majorana mass terms for neutrinos and
considerable masses for flavons. The cosmological demand for the sufficiently
fast decay of flavons implies a lower limit on the electron neutrino mass in
the range of 0.1-1 eV.Comment: 24 pages, 1 figure (not included but available upon request), LaTex,
IC/92/196, SISSA-140/92/EP, LMU-09/9
ORGANIC SHIFTERS FOR COMPOSITE SCINTILLATORS
In this work luminescence properties of different organic shifters are studied. Absorption, photoluminescence and excitation spectra are presented. Photoluminescent spectrum contain emission band with maximum at 436 nm. This peak most effectively excited by light with 420 nm and 310 nm wavelengths
Neutrino properties
Neutrinos have reached the status of being probes to study the structure of other systems. We have not, however, definite answers to the questions associated with its intrinsic properties. The selected topics are organized according to a 'Decamerous', which covers both aspects of neutrino physics. One comes to the conclusion that we are entering an exciting period in this field, with experiments able to establish new phenomena and/or put better limits to some intrinsic properties