TY - JOUR
T1 - The Karlsruhe 4π barium fluoride detector
AU - Wisshak, K.
AU - Guber, K.
AU - Käppeler, F.
AU - Voss, F.
PY - 1990/12/20
Y1 - 1990/12/20
N2 - The Karlsruhe 4π barium fluoride detector is the first spherically symmetric detector made from BaF2 crystals with ∼100% efficiency for gamma-rays up to 10 MeV. It consists of 42 crystals shaped as hexagonal and pentagonal truncated pyramids forming a spherical shell with 10 cm inner radius and 15 cm thickness. All crystals are supplied with a reflector and photomultiplier, thus representing independent gamma-ray detectors. The energy resolution of the individual detector modules is 10-11% at 662 keV and 4-5% at 6.13 MeV gamma-ray energy, while the time resolution as measured with a 60Co source is 400-500 ps. The energy resolution of the sum energy signal of the 4π detector is 14% at 662 keV and 7% at 2.5 MeV gamma-ray energy, the overall time resolution is 500 ps and the peak efficiency 90% at 1 MeV. This is a quite unique combination for a gamma-ray detector that became possible by the recent availability of large barium fluoride crystals.
AB - The Karlsruhe 4π barium fluoride detector is the first spherically symmetric detector made from BaF2 crystals with ∼100% efficiency for gamma-rays up to 10 MeV. It consists of 42 crystals shaped as hexagonal and pentagonal truncated pyramids forming a spherical shell with 10 cm inner radius and 15 cm thickness. All crystals are supplied with a reflector and photomultiplier, thus representing independent gamma-ray detectors. The energy resolution of the individual detector modules is 10-11% at 662 keV and 4-5% at 6.13 MeV gamma-ray energy, while the time resolution as measured with a 60Co source is 400-500 ps. The energy resolution of the sum energy signal of the 4π detector is 14% at 662 keV and 7% at 2.5 MeV gamma-ray energy, the overall time resolution is 500 ps and the peak efficiency 90% at 1 MeV. This is a quite unique combination for a gamma-ray detector that became possible by the recent availability of large barium fluoride crystals.
UR - http://www.scopus.com/inward/record.url?scp=38249016971&partnerID=8YFLogxK
U2 - 10.1016/0168-9002(90)90748-U
DO - 10.1016/0168-9002(90)90748-U
M3 - Article
AN - SCOPUS:38249016971
SN - 0168-9002
VL - 299
SP - 60
EP - 65
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-3
ER -