Speaker
Prof.
Akira Yoshikawa
(Institute for Materials Research, Tohoku University)
Description
High-light-output and good-energy-resolution scintillators are required in various fields. Ce:LaBr_3 has recently been proposed and showed a high light output of \sim 60,000 ph./MeV; however, it has strongly hygroscopic and a smaller effective-atomic-number of 46.9 than other scintillators with that of more than 50, typically. A Ce:Lu_2SiO_5 (Ce:LSO) scintillator is chemically stable and has a good light output of 30,000 ph./MeV, while Ce:LSO has an intrinsic background from Lu-176 (natural abundance of 2.59\%). Recently, using our own crystal growth technique with prompt and complete cycle of characterization system, we have developed high-light-yield and high-energy-resolution scintillators such as multi-component garnet Ce:(Gd,Lu,Y)_3(Al,Ga)_5O_{12} (LY\sim 65,000 ph/MeV, \Delta E/E<4.0, decay time \sim 90 ns) and Eu:SrI_2 (LY\sim 80,000 ph/MeV, \Delta E/E<4.0, decay time \sim 1.5\mu s), where LY and \Delta E/E are light output and FWHM energy resolution at 662 keV, respectively. In this presentation, we will show the strategy of new scintillator development. These crystals will be introduced together with the design rule, crystal growth capability, luminescent study and the result of performance test.
| quote your primary experiment | scintillator |
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Primary author
Prof.
Akira Yoshikawa
(Institute for Materials Research, Tohoku University)
Co-authors
Dr
Kei Kamada
(IMR, Tohoku Univ.)
Dr
Shunsuke Kurosawa
(IMR, Tohoku University)
Dr
Yuui Yokota
(IMR, Tohoku Univ.)
