IGEX

AcronymDefinition
IGEXInternational GLONASS EXperiment
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References in periodicals archive ?
The GERDA result is consistent with the negative results from IGEX and HdM.
Figure 15 shows the limits set on [sup.76]Ge [T.sup.0v.sub.1/2] as determined by GERDA alone and combining GERDA with HdM and IGEX and on [sup.136]Xe [T.sup.0v.sub.1/2] as obtained by KamLAND-Zen and EXO-200 separately and combined.
Brodzinski et al., "IGEX 76Ge neutrinoless double-beta decay experiment: prospects for next generation experiments," Physical Review D, vol.
Today two large scale projects benefit from the heritage of HDM and IGEX for their ambitious program: GERDA, a mainly European collaboration and MAJORANA, mainly US collaboration.
GERDA and MAJORANA aim at a background reduction of more than one order of magnitude with respect to HDM and IGEX. While both experiments are based on the same technology, the way they plan to achieve their background goal is influenced by the different conclusions of the respective precursors concerning the most relevant background sources.
In IGEX, on the contrary, the background counting rate was ascribed to radioisotopes produced by cosmic ray neutron spallation reactions, which occurred in the detector and cryostat components while they were above ground.
On the contrary, in coaxial HPGe (namely, the kind of detectors employed in the past generation experiments, like HDM and IGEX) the difference in shape is less pronounced and more varied, requiring sophisticate algorithms (as neural network systems) for event classification.
(i) GERDA-I (presently taking data) is going to verify the KHDK claim [81] using the coaxial HPGe enriched detectors inherited from the HDM and IGEX experiments (~18 kg of ~86% enriched Ge) and few new detectors (enriched BEGe diodes, deployed only in June 2012, having a total mass of ~3.6 kg of ~88% enriched Ge).
Extending the GERDA profile likelihood to include HDM and IGEX spectra (i.e., using the sum exposure or the three experiments) the Bayes factor is further reduced to 2 x [10.sup.-4]; that is, model [H.sub.1] is strongly disfavored.