A5084572976- Particle Detector Development and Performance
- Astrophysical Phenomena and Observations
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- Astronomical Observations and Instrumentation
- Geology and Paleoclimatology Research
- Gamma-ray bursts and supernovae
- X-ray Spectroscopy and Fluorescence Analysis
- Geological and Geophysical Studies
- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
- Radioactive Decay and Measurement Techniques
- Methane Hydrates and Related Phenomena
- Particle Accelerators and Free-Electron Lasers
- Photocathodes and Microchannel Plates
- Electron and X-Ray Spectroscopy Techniques
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Superconducting Materials and Applications
- Geological and Geochemical Analysis
- Advanced X-ray and CT Imaging
- Pulsars and Gravitational Waves Research
Institut de physique du globe de Paris
2017-2024
Université Paris Cité
2021-2024
Centre National de la Recherche Scientifique
2023-2024
Sorbonne Université
2023
Institut des Sciences de la Terre de Paris
2023
Istituto di Astrofisica Spaziale e Fisica cosmica di Palermo
1984-2007
University of Palermo
1982-1986
European Space Research and Technology Centre
1979-1983
In this paper we describe the High Pressure Gas Scintillation Proportion Counter, one of Narrow Field Instrument X–ray astronomy satellite BeppoSAX. Sensitive in 4-120 keV band, HPGSPC will study all astrophysical sources emitting poorly studied hard band. The design and performances instrument are reported together with results on–ground calibration data analysis.
The spectral properties of a sample six low-mass X-ray binaries are studied using data obtained with the Gas Scintillation Proportional Counter (GSPC) on EXOSAT. various continuum models proposed for these sources investigated. Only two-component provide an acceptable fit to data. Two possible model combinations were found: in both cases one component was blackbody other either thermal bremsstrahlung or unsaturated Comptonized spectrum low-energy photons high-energy electrons. characteristic...
Abstract The seismic potential of the Lesser Antilles subduction zone is poorly known and highly debated. Only two damaging earthquakes have been reported in historical period, 1839 1843, but their sources magnitude are still uncertain. Global Navigation Satellite Systems coral data contradict each other, no conclusion has reached on coupling ratio plate interface. Given threat posed by possible occurrence a large megathrust earthquake, it crucial to gain information prehistorical events. We...
The in-orbit performance of the EXOSAT gas scintillation proportional counter spectrometer is presented. background rejection capability in deep orbit examined as well overall detectors response. Typical examples spectra from cosmic X-ray sources show that this new type detector will make a significant advance to field medium energy broad band spectroscopy.
A position sensitive gas scintillation proportional counter is presented for use as a broad band spectrometer in the focal plane of an imaging X-ray telescope. The 7 cm diameter detector has on-axis ~ 2.5 mm and energy resolution 10% 6 keV X-rays. Design improvements are outlined which should provide below 1 at over useful aperture 8 cm. Such detector, can, conjunction with suitable telescope, perform spectral mapping range 0.1 - extended objects such clusters galaxies supernova remnants...
Results are presented on improvements in the performance of medium energy large area gas scintillation proportional counters for use X-ray astronomy. By a suitable choice mixture electron transit time through drift region can be significantly lowered with consequent reduction detector dead time. In addition diffusion is also reduced and this should result an increase background rejection efficiency.
Results are presented on the performance of a large area gas scintillation proportional counter (GSPC) experiment for application as spectrometer in X-ray astronomy. Two such counters will be launched an Aries sounding rocket 1979. This has total collecting 630 cm2, and energy resolution 11% 6 keV X-rays. The intrinsic background rejection capability with aid burst length discrimination was ~ 80% acceptance at keV.
The Indonesian Young Toba Tuff (YTT), classically dated around 74 ka BP, is considered as a short-lived explosive cataclysmic super-eruption. huge amounts of ash and SO2 emitted are likely to have triggered volcanic winter which accelerated the transition last glaciation, may induced human genetic bottleneck. However, global climatic impact YTT or its duration hotly debated. present work offers new interpretation complex eruptive history. Analysing BAR94-25 marine core proximal center...
view Abstract Citations (24) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Time Variability of Gamma Cassiopeiae in X-Rays Frontera, F. ; dal Fiume, D. Robba, N. R. Manzo, G. Re, S. Costa, E. A 22,000 s observation with EXOSAT the X-ray source 4U 0053+60/Gamma reveals oscillations flux a period about 6000 s. The also exhibits chaotic variability time scales down to few tens seconds. This strengthens hypothesis that is neutron star wide orbit...
Results are presented on the development of a position sensitive gas scintillation proportional counter for use in high energy X-ray astronomy. This detector has higher background rejection efficiency and better resolution above 35 keV than conventional scintillators, counters crystal scintillators. These improvements arise directly fran application discrimination technique which makes detection fluorescent Xenon K shell photon emitted most interactions involving photoabsorption genuine...
The High Pressure Gas Scintillation Proportional Counter (HPGSPC), one of the experiments on board Italian-Dutch X-Ray Astronomy Satellite SAX, is a large area (450 cm2), xenon filled (5 atm.), high energy resolution (3% at 60 keV) detector sensitive in range from 4 to 120 keV. In paper we give general description characteristic experiment. Some effort dedicated illustrate correction algorithm required for preserving potentially good full .
The products of eruptive and mass-wasting processes that built island arc volcanoes are better preserved in marine deposits than on land. Holes U1397A U1399A drilled during IODP Expedition 340 provide a 1.5 Ma record the volcanic history Martinique. 14 C dating δ 18 O patterns used to reconstitute chronostratigraphy tephra, volcaniclastic turbidites, events (traced by debris avalanches, debrites, duplication deformation pre-existing sediments), leading new Montagne Pelée Pitons du Carbet...
Experimental results obtained from a new, position sensitive, gas scintillation proportional counter are presented. The counter, for use in X-ray astronomy as focal plane instrument conjunction with grazing incidence imaging telescope, features useful aperture of ~ 7 cm, two-stage region and seven photomultiplier tube Anger camera read-out system. An energy resolution μ 20% FWHM at 1.25 keV (< 10% 6 keV) 900 μm the centre achieved.