9 documents found, page 1 of 1
Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusio...
Gonzalez-Diaz, Diego; Alvarez, V.; Borges, F. I. G.; Camargo, M.; Carcel, S.; Cebrian, S.; Cervera, A.; Conde, C. A. N.; Dafni, T.; Diaz, J.; Esteve, R.
Radiopurity assessment of the tracking readout for the NEXT double beta decay e...
Cebrián, S.; Pérez, J.; Bandac, I.; Labarga, L.; Álvarez, V.; Barrado, A. I.; Bettini, A.; Borges, F. I. G. M.; Camargo, M.; Cárcel, S.; Cervera, A.
An improved measurement of electron-ion recombination in high-pressure xenon gas
Serra, L.; Sorel, M.; Álvarez, V.; Borges, F. I. G.; Camargo, M.; Cárcel, S.; Cebrián, S.; Cervera, A.; Conde, C. A. N.; Dafni, T.; Díaz, J.; Esteve, R.
Ionization and scintillation of nuclear recoils in gaseous xenon
Renner, J.; Gehman, V. M.; Goldschmidt, A.; Matis, H. S.; Miller, T.; Nakajima, Y.; Nygren, D.; Oliveira, C. A. B.; Shuman, D.; Álvarez, V.
Radiopurity control in the NEXT-100 double beta decay experiment: procedures an...
Álvarez, V; Bandac, I.; Bettini, A.; Borges, F. I. G. M.; Cárcel, S.; Castel, J.; Cebrián, S.; Cervera, A.; Conde, C. A. N.; Dafni, T.
Characterization of an energy dispersive X-ray fluorescence imaging system base...
Silva, A. L. M.; Azevedo, C. D. R.; Oliveira, C. A. B.; Santos, J. M. F. dos; Carvalho, M. L.; Veloso, J. F. C. A.An Energy Dispersive X-ray Fluorescence (EDXRF) imaging system based on a Micropattern Gas Detector has already shown good results for di erent applications. An X-ray tube, a pinhole camera and a Micro-Hole and Strip Plate (MHSP) based detector are the main components of the experimental system. The detector uses an MHSP in a Xe atmosphere at 1 bar, acting as a photon counting device, i.e., it is capable to rec...
High-rate operation of the Micro-Hole and Strip Plate gas detector
Veloso, J. F. C. A.; Caldas, C. C.; Oliveira, C. A. B.; Azevedo, C. D. R.; Santos, J. M. F. dos; Breskin, A.; Chechik, R.We report the performance of the Micro-Hole-and-Strip-Plate (MHSP) operated in xenon, under high-flux irradiation of a 30-kV X-ray Cu-tube. Stable operation in pulse-counting mode for gas gains above 104 was measured up to counting rates of 5×105 Hz/mm2. A gain variation of less than 5% was observed for gains of 104, while the energy resolution for 8-keV X-rays degrades from ~16% to ~18%. No visible degradation...
Photoelectron collection efficiency at high pressure for a gamma detector envis...
Azevedo, C. D. R.; Oliveira, C. A. B.; Santos, J. M. F. dos; Veloso, J. F. C. A.Recent developments on gas avalanche detectors based on microstructures operating at high pressure allow fair detection efficiency for hard X- and gamma-rays. A hybrid system combining an assisted scintillation in a highpressure xenon gas medium and two UV photosensors based on microstructures operating face to face, having the xenon medium sandwiched between, is under investigation for imaging purposes. To eva...
Simulation method for position and energy corrections in scintillation detectors
Oliveira, C. A. B.; Azevedo, C. D. R.; Ferreira, A. L.; Veloso, J. F. C. A.The first steps towards a Monte Carlo simulation method for energy and position corrections in a gas scintillator detector are presented. Recent developments on gas avalanche detectors based on microstructures operating a thigh pressure allow fair detection efficiency for hard X- and gamma-rays. A hybrid system combining an assisted scintillation in a high pressure xenon gas medium and two UV photosensors based...