A5105516085- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Radioactive contamination and transfer
- Astronomical and nuclear sciences
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Galaxies: Formation, Evolution, Phenomena
- Radioactivity and Radon Measurements
University of Rome Tor Vergata
2013-2025
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2010-2025
Sapienza University of Rome
2001-2024
Istituto Nazionale di Fisica Nucleare
2010-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2002-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2008-2017
Instituto Bernabeu
2013
Institute of High Energy Physics
2013
Jinggangshan University
2010-2011
Chinese Academy of Social Sciences
2003-2011
The highly radiopure $\simeq$ 250 kg NaI(Tl) DAMA/LIBRA set-up is running at the Gran Sasso National Laboratory of I.N.F.N.. In this paper first result obtained by exploiting model independent annual modulation signature for Dark Matter (DM) particles presented. It refers to an exposure 0.53 ton$\times$yr. collected data satisfy all many peculiarities DM signature. Neither systematic effects nor side reactions can account observed amplitude and contemporaneously several requirements Thus,...
DAMA/LIBRA is running at the Gran Sasso National Laboratory of I.N.F.N. Here results obtained with a further exposure 0.34 ton × yr are presented. They refer to two annual cycles collected one before and after first upgrade occurred on September/October 2008. The cumulative those previously released by former DAMA/NaI now 1.17 yr, corresponding 13 cycles. data confirm previous positive investigating presence Dark Matter (DM) particles in galactic halo means model independent modulation...
We report the complete GNO solar neutrino results for measuring periods III, II, and I. The result III (last 15 runs) is [54.3 + 9.9 - 9.3 (stat.)+- 2.3 (syst.)] SNU (1 sigma) or 10.2 9.6 (incl. syst.)] with errors combined. experiment now terminated after altogether 58 exposure runs that were performed between May 20, 1998 April 9, 2003. combined (I+II+III) [62.9 5.5 5.3 (stat.) +- 2.5 6.0 5.9] in quadrature. Overall, gallium based observations at LNGS (first GALLEX, later GNO) lasted from...
The results obtained with the total exposure of 1.04 ton x yr collected by DAMA/LIBRA-phase1 deep underground at Gran Sasso National Laboratory (LNGS) I.N.F.N. during 7 annual cycles (i.e. adding a further 0.17 exposure) are presented. data give evidence for presence Dark Matter (DM) particles in galactic halo, on basis exploited model independent DM modulation signature using highly radio-pure NaI(Tl) target, 7.5 sigma C.L.. Including also first generation DAMA/NaI experiment (cumulative...
The first model independent results obtained by the DAMA/LIBRA-phase2 experiment are presented.The data have been collected over 6 annual cycles corresponding to a total exposure of 1.13 t yr, deep underground at Gran Sasso National Laboratory (LNGS) I.N.F.N.The apparatus, ≃ 250 kg highly radio-pure NaI(Tl), profits from second generation high quantum efficiency photomultipliers and new electronics with respect DAMA/LIBRA-phase1.The improved experimental configuration has also allowed...
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact this excess on dark matter or neutrino sensitivity these experiments, collective effort has been started share knowledge about individual observations. For this, EXCESS Workshop was initiated. In its first iteration in June 2021, ten rare search collaborations contributed initiative via talks...
The DAMA/NaI experiment (about 100 kg highly radiopure NaI(Tl)) was proposed, designed and realised to effectively investigate in a model independent way the presence of Dark Matter particle component galactic halo by exploiting annual modulation signature. With total exposure 107731 day, collected over seven cycles deep underground at Gran Sasso National Laboratory I.N.F.N., it has pointed out -- 6.3 sigma C.L. an effect which satisfies all peculiarities signature neither systematic effects...
The first results obtained by the DAMA/LIBRA–phase2 experiment are presented. data have been collected over six independent annual cycles corresponding to a total exposure of 1.13 ton × year, deep underground at Gran Sasso National Laboratory. apparatus, about 250 kg highly radio-pure NaI(Tl), profits from second generation high quantum efficiency photomultipliers and new electronics with respect DAMA/LIBRA–phase1. improved experimental configuration has also allowed lower software energy...
Experimental observations and theoretical arguments at Galaxy larger scales have suggested that a large fraction of the Universe is composed by Dark Matter particles. This has motivated DAMA experimental efforts to investigate presence such particles in galactic halo exploiting model independent signature very highly radiopure set-ups deep underground. Few introductory are summarized before presenting review present positive results obtained DAMA/NaI DAMA/LIBRA Gran Sasso National Laboratory...
The long-standing model-independent annual modulation effect measured by the DAMA Collaboration, which fulfills all requirements of a dark matter signature, and new result CoGeNT experiment that shows similar behavior are comparatively examined under hypothesis candidate particle interacting with detectors' nuclei coherent elastic process. ensuing physical regions in plane matter-particle mass versus nucleon cross-section derived for various galactic halo models taking into account impact...
New dedicated high quantum efficiency (Q.E.) photomultipliers (PMTs) have been produced by HAMAMATSU company, tested, selected and installed in the DAMA/LIBRA set-up at Gran Sasso National Laboratory (LNGS) of I.N.F.N.. In this paper results obtained measurements various features these Q.E. PMTs are reported, some performances new configuration shown.
The DAMA-NaI Collaboration has observed a $4\ensuremath{\sigma}$ C.L. model-independent effect investigating the annual modulation signature in counting rate of an NaI(Tl) setup (total exposure 57986 kg day) and implications this have been studied under different model-dependent assumptions. In paper we extend one previous analyses, case WIMP with purely spin-independent coupling, by discussing detail on results uncertainties dark matter galactic velocity distribution. We study systematic...
The channeling effect of low energy ions along the crystallographic axes and planes NaI(Tl) crystals is discussed in framework corollary investigations on WIMP Dark Matter candidates. In fact, modeling this existing implies a more complex evaluation luminosity yield for recoiling Na I ions. present paper related phenomenological arguments are developed possible implications at some extent.
The effect pointed out by A. B. Migdal in 1940's (hereafter named effect) has so far been usually neglected the direct searches for WIMP Dark Matter candidates. This consists ionization and excitation of bound atomic electrons induced recoiling nucleus. In present paper related theoretical arguments are developed some consequences proper accounting this discussed examples practical interest.
Some extensions of the standard model provide dark matter candidate particles which can have a dominant coupling with lepton sector ordinary matter. Thus, such (${\ensuremath{\chi}}^{0}$) be directly detected only through their interaction electrons in detectors suitable experiment, while they are lost by experiments based on rejection electromagnetic component experimental counting rate. These candidates also offer possible source 511 keV photons observed from galactic bulge. In this paper...
In this paper a new search for non-Paulian nuclear processes, i.e. processes normally forbidden by the Pauli Exclusion Principle (PEP), is presented. It has been carried out at Gran Sasso National Laboratory of INFN means highly radiopure DAMA/LIBRA set-up (sensitive mass about 250 kg NaI(Tl)). particular, improved upper limit spontaneous emission rate protons with energy E p ≥ 10 MeV in 23Na and 127I obtained: 1.63 × 10−33 s−1 (90% C.L.). The corresponding on relative strength (δ 2)...
The double-beta decay of $^{116}\mathrm{Cd}$ has been investigated with the help radiopure enriched $^{116}\mathrm{Cd}{\mathrm{WO}}_{4}$ crystal scintillators (mass 1.162 kg) at Gran Sasso underground laboratory. half-life relative to $2\ensuremath{\nu}2\ensuremath{\beta}$ ground state $^{116}\mathrm{Sn}$ was measured highest up-to-date accuracy as ${T}_{1/2}=(2.6{3}_{\ensuremath{-}0.12}^{+0.11})\ifmmode\times\else\texttimes\fi{}{10}^{19}\text{ }\text{ }\mathrm{yr}$. A new improved limit on...
The DAMA experiment using ultra low background NaI(Tl) crystal scintillators has measured an annual modulation effect in the keV region which satisfies all peculiarities of induced by Dark Matter particles. In this paper we analyze terms mirror Matter, exact duplicate ordinary matter from parallel hidden sector, chemical composition is dominated helium while it can also contain significant fractions heavier elements as Carbon and Oxygen. atoms are considered to interact with target nuclei...