26 research outputs found
Development of Mo-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search
We report recent achievements in the development of scintillating bolometers to search for neutrinoless double-beta decay of Mo. The presented results have been obtained in the framework of the LUMINEU, LUCIFER and EDELWEISS collaborations, and are now part of the R\&D activities towards CUPID (CUORE Update with Particle IDentification), a proposed next-generation double-beta decay experiment based on the CUORE experience. We have developed a technology for the production of large mass (1 kg), high optical quality, radiopure zinc and lithium molybdate crystal scintillators (ZnMoO and LiMoO, respectively) from deeply purified natural and Mo-enriched molybdenum. The procedure is applied for a routine production of enriched crystals. Furthermore, the technology of a single detector module consisting of a large-volume (~cm) ZnMoO and LiMoO scintillating bolometer has been established, demonstrating performance and radiopurity that are close to satisfy the demands of CUPID. In particular, the FWHM energy resolution of the detectors at 2615 keV --- near the -value of the double-beta transition of Mo (3034~keV) --- is 4--10~keV. The achieved rejection of -induced dominant background above 2.6~MeV is at the level of more than 99.9\%. The bulk activity of Th (Th) and Ra in the crystals is below 10 Bq/kg. Both crystallization and detector technologies favor LiMoO, which was selected as a main element for the realization of a CUPID demonstrator (CUPID-0/Mo) with 7 kg of Mo
“Dipartimento Senza Fumo”: un intervento di promozione della salute in ambito universitario
Il consumo di tabacco comporta molteplici aspetti, non solo sanitari ma
anche socio-culturali, psicologici ed economici. Promuovere una cultura
libera dal tabacco, quindi, richiede un approccio globale e multifattoriale.
Tenendo conto della normativa vigente a livello nazionale e all’interno
dell’Università Sapienza di Roma, il Dipartimento di Sanità Pubblica e
Malattie Infettive ha sviluppato il progetto “Dipartimento senza fumo”
per promuovere la salute del singolo, della comunità e la salvaguardia
dell’ambiente.
L’obiettivo del presente studio è rendere il Dipartimento di Sanità Pubblica
e Malattie Infettive un luogo libero dal fumo, costituendo un modello
di promozione della salute nel pieno rispetto della normativa vigente,
tutelando la salute e la sicurezza nei luoghi di lavoro e/o di studio
e assicurando il decoro nei luoghi pubblici. Lo studio si propone, inoltre,
di favorire la “Health Literacy” come una delle “missions” universitarie
e di sensibilizzare altri dipartimenti a diventare luoghi liberi dal fumo
First test of an enriched 116 CdWO 4 scintillating bolometer for neutrinoless double-beta-decay searches
Antibodies directed to the insulin receptor. Clinical aspects and applications to the study of insulin action
Recommended from our members
Final results on the 0 νββ decay half-life limit of 100 Mo from the CUPID-Mo experiment
The CUPID-Mo experiment to search for 0νββ decay in 100Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0νββ decay experiment. CUPID-Mo was comprised of 20 enriched Li 2100MoO 4 scintillating calorimeters, each with a mass of ∼ 0.2 kg, operated at ∼ 20 mK. We present here the final analysis with the full exposure of CUPID-Mo (100Mo exposure of 1.47 kg × year) used to search for lepton number violation via 0νββ decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the 100Mo 0νββ decay half-life of T1/20ν> 1.8 × 10 24 year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of 〈 mββ〉 <(0.28-0.49) eV, dependent upon the nuclear matrix element utilized
Final results on the decay half-life limit of Mo from the CUPID-Mo experiment
The CUPID-Mo experiment to search for 0 decay in Mo
has been recently completed after about 1.5 years of operation at Laboratoire
Souterrain de Modane (France). It served as a demonstrator for CUPID, a next
generation 0 decay experiment. CUPID-Mo was comprised of 20
enriched LiMoO scintillating calorimeters, each with a mass of
0.2 kg, operated at 20 mK. We present here the final analysis with
the full exposure of CUPID-Mo (Mo exposure of 1.47 kgyr) used
to search for lepton number violation via 0 decay. We report on
various analysis improvements since the previous result on a subset of data,
reprocessing all data with these new techniques. We observe zero events in the
region of interest and set a new limit on the Mo 0 decay
half-life of T^{0\nu}_{1/2} > 1.8 \times 10^{24} year (stat.+syst.) at 90%
C.I. Under the light Majorana neutrino exchange mechanism this corresponds to
an effective Majorana neutrino mass of \left <
(0.28-- eV, dependent upon the nuclear matrix element utilized
Recommended from our members
New measurement of double-β decays of Mo100 to excited states of Ru100 with the CUPID-Mo experiment
The CUPID-Mo experiment, located at the Laboratoire Souterrain de Modane (France), was a demonstrator experiment for CUPID. It consisted of an array of 20Li2Mo100O4 (LMO) calorimeters, each equipped with a Ge light detector for particle identification. In this work, we present the result of a search for two-neutrino and neutrinoless double-β decays of Mo100 to the first 0+ and 2+ excited states of Ru100 using the full CUPID-Mo exposure (2.71kgyr of LMO). We measure the half-life of 2νββ decay to the 01+ state as T1/22ν→01+=(7.5±0.8(stat.)-0.3+0.4(syst.))×1020yr. The bolometric technique enables measurement of the electron energies as well as the γ rays from nuclear deexcitation and this allows us to set new limits on the two-neutrino decay to the 21+ state of T1/22ν→21+>4.4×1021yr(90% c.i.) and on the neutrinoless modes of T1/20ν→21+>2.1×1023yr(90% c.i.), T1/20ν→01+>1.2×1023yr(90% c.i.). Information on the electrons' spectral shape is obtained, which allows us to make the first comparison of the single and higher state dominance 2νββ decay models for the 01+ excited state of Ru100