RT Conference Proceedings
T1 Assessment of New Photosensors for Fast Timing Applications with Large Scintillator Detectors
A1 Fraile, L. M.
A1 Mach, H.
A1 Olaizola, B.
A1 Paziy, V.
A1 Picado, E.
A1 Sánchez, J. J.
A1 Udías, José Manuel
A1 Vaquero López, Juan José
A1 Vedia, V.
AB The measurement of absolute nuclear transition probabilities is a very sensitive tool to study the structure of the atomic nucleus. Direct access to transition rates can be achieved via the lifetime of the nuclear levels de-populated in radioactive decay. The Advanced Time-Delayed (ATD) method, or Fast Timing, is a well-established technique to measure lifetimes down to a few ps. The development of the technique was based on the use of BaF_2 detectors, but a recent major breakthrough occurred with the introduction of LaBr_3(Ce) crystals, uniting excellent time response with much superior energy resolution than BaF_2 crystals. Relatively large LaBr_3(Ce) cylindrical detectors of typically 1.5"×1.5" are employed for fast timing, in combination with fast 2-inch photomultiplier tubes from Photonis such as the linear focused 8-stage XP20D0. Another option for a 2-inch fast phototube is the 8-stage Hamamatsu R9779, whose timing properties have already been tested with small LSO crystals. New possibilities are also offered by novel photosensors such as silicon photomultipliers, which are intrinsically fast. In this work we have investigated the performance of the Hamamatsu R9779 photomultiplier tube, and the viability of CeBr_3 crystals for fast-timing applications.
PB Ieee - The Institute Of Electrical And Electronics Engineers, Inc
SN 978-1-4673-0118-3
SN 1082-3654
YR 2011
FD 2011
LK https://hdl.handle.net/10016/20276
UL https://hdl.handle.net/10016/20276
LA eng
NO Proceedings of: 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). Valencia, Spain, 23-29 October 2011
NO This work was supported in part by Comunidad de Madrid (ARTEMIS S2009/DPI-1802) and the Spanish Ministry of Science and Innovation (grants FPA201O-l7l42 and CSPD-2007-00042, Ingenio2010).
DS e-Archivo
RD 17 jul. 2024