817 research outputs found
Spectroscopy of electron-induced fluorescence in organic liquid scintillators
Emission spectra of several organic liquid-scintillator mixtures which are
relevant for the proposed LENA detector have been measured by exciting the
medium with electrons of ~10keV. The results are compared with spectra
resulting from ultraviolet light excitation. Good agreement between spectra
measured by both methods has been found.Comment: 6 pages, 7 figure
Fluorescence decay-time constants in organic liquid scintillators
The fluorescence decay-time constants have been measured for several
scintillator mixtures based on phenyl-o-xylylethane (PXE) and linear
alkylbenzene (LAB) solvents. The resulting values are of relevance for the
physics performance of the proposed large-volume liquid scintillator detector
LENA (Low Energy Neutrino Astronomy). In particular, the impact of the measured
values to the search for proton decay via p -> K+ antineutrino is evaluated in
this work.Comment: 7 pages, 5 figure
Low energy neutrino astronomy with the large liquid scintillation detector LENA
The detection of low energy neutrinos in a large scintillation detector may
provide further important information on astrophysical processes as supernova
physics, solar physics and elementary particle physics as well as geophysics.
In this contribution, a new project for Low Energy Neutrino Astronomy (LENA)
consisting of a 50kt scintillation detector is presented.Comment: Proccedings of the International School of Nuclear Physics, Neutrinos
in Cosmology, in Astro, Particle and Nuclear Physics, Erice (SICILY) 16 - 24
Sept. 200
The -cleus experiment: A gram-scale fiducial-volume cryogenic detector for the first detection of coherent neutrino-nucleus scattering
We discuss a small-scale experiment, called -cleus, for the first
detection of coherent neutrino-nucleus scattering by probing nuclear-recoil
energies down to the 10 eV-regime. The detector consists of low-threshold
CaWO and AlO calorimeter arrays with a total mass of about 10 g and
several cryogenic veto detectors operated at millikelvin temperatures.
Realizing a fiducial volume and a multi-element target, the detector enables
active discrimination of , neutron and surface backgrounds. A first
prototype AlO device, operated above ground in a setup without
shielding, has achieved an energy threshold of eV and further
improvements are in reach. A sensitivity study for the detection of coherent
neutrino scattering at nuclear power plants shows a unique discovery potential
(5) within a measuring time of weeks. Furthermore, a site
at a thermal research reactor and the use of a radioactive neutrino source are
investigated. With this technology, real-time monitoring of nuclear power
plants is feasible.Comment: 14 pages, 19 figure
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