TY - JOUR
T1 - High-energy gamma ray spectrometer for heavy-ion induced experiments
AU - Kubono, S.
AU - Tanaka, M. H.
AU - Kawakami, H.
AU - Sueki, K.
AU - Miyatake, H.
AU - Nomura, T.
AU - Morita, K.
AU - Ishihara, M.
AU - Kato, S.
AU - Konno, C.
AU - Sakaguchi, A.
N1 - Funding Information:
The authors are grateful to T. Fujino, Y. Fuchi and the staff of the machine shop of INS for the goniome- ter, and H. Kawashima for electronic modules. They are also indebted to the cyclotron crew of INS for smooth running of the cyclotron and I. Sugai and J. Tanaka for target preparation. They also thank the manufacturer Horiba Ltd. for the NaI(T1) crystals. This work was supported partly by the Grant-in-Aid for Scientific Research from the Japanese Ministry of Education, Science and Culture.
PY - 1986/10/1
Y1 - 1986/10/1
N2 - A gamma-ray detector system of large NaI(Tl) crystals has been constructed to investigated heavy ion reaction mechanisms and highly excited nuclear structure with heavy ion beams. The NaI(Tl) crystals have as a whole a cross section of hexagonal shape of 30 cm between the parallel sides and a length of 20 cm, and are composed of seven substructures based on a honeycomb shape. This is designed for detection of high energy gamma rays with high resolution, and also for use as an anti-Compton spectrometer for a Germanium detector. A good energy resolution of 2.7 (3.2)% fwhm was obtained for 22.3 MeV gamma rays with 18 (39)% detection effeciency of the full-energy-loss peak with anti-Compton mode (sum mode) operation of the trapezoidal NaI(Tl) crystals. Compton scattering background in a spectrum by a Ge detector was successfully reduced by about 60% in applying the trapezoidal NaI(Tl) crystals for Compton suppression. The performance of the spectrometer is discussed.
AB - A gamma-ray detector system of large NaI(Tl) crystals has been constructed to investigated heavy ion reaction mechanisms and highly excited nuclear structure with heavy ion beams. The NaI(Tl) crystals have as a whole a cross section of hexagonal shape of 30 cm between the parallel sides and a length of 20 cm, and are composed of seven substructures based on a honeycomb shape. This is designed for detection of high energy gamma rays with high resolution, and also for use as an anti-Compton spectrometer for a Germanium detector. A good energy resolution of 2.7 (3.2)% fwhm was obtained for 22.3 MeV gamma rays with 18 (39)% detection effeciency of the full-energy-loss peak with anti-Compton mode (sum mode) operation of the trapezoidal NaI(Tl) crystals. Compton scattering background in a spectrum by a Ge detector was successfully reduced by about 60% in applying the trapezoidal NaI(Tl) crystals for Compton suppression. The performance of the spectrometer is discussed.
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U2 - 10.1016/0168-9002(86)91151-4
DO - 10.1016/0168-9002(86)91151-4
M3 - Article
AN - SCOPUS:27044435361
VL - 251
SP - 74
EP - 80
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
SN - 0168-9002
IS - 1
ER -