4-5 February 2011
RIKEN
Asia/Tokyo timezone

Development of an 8 x 8 array of LaBr3(Ce) pixels for a gaseous Compton gamma-ray camera

5 Feb 2011, 10:00
45m
Nishina Hall (RIKEN)

Nishina Hall

RIKEN

Speaker

Mr Shunsuke Kurosawa (Kyoto University)

Summary

For Mev and sub-MeV gamma-ray astronomy or medical imaging, we have
developed an electron-tracking Compton camera (ETCC) consisting of a
gaseous Time Projection Chamber (TPC) and a scintillator. The TPC
measures the three-dimensional track and energy of a Compton
recoil-electron, while the scintillator measures the energy and position
of the scattered gamma ray. Therefore, the ETCC is able to reconstruct
Compton scattering event-by-event.
Since the angular resolution of the camera depends on an energy
resolution of the scintillator, we have adopted a LaBr3(Ce) that has an
excellent energy resolution. We have developed an 8 x 8 array of the
LaBr3(Ce) pixels with a pixel size of 5.8 mm x 5.8 mm x 15.0 mm (or 20.0
mm) in order to have position sensitivity for gamma rays. The array was
coupled to an 8 x 8 multi-anode PMT (Hamamatsu H8500), and the pixel
size was as the same as the anode size. The energy resolution of the
array reached 5.2±0.6% (FWHM) at 662 keV. Using the LaBr3(Ce) arrays,
the ETCC had an angular resolution of 4.2±0.3 degrees (FWHM) at 662 keV.

Primary author

Mr Shunsuke Kurosawa (Kyoto University)

Co-authors

Dr Atsushi Takada (Kyoto University) Dr D. Joseph Parker (Kyoto University) Dr Hidetoshi Kubo (Kyoto University) Mr Kazuki Ueno (RIKEN) Dr Kentaro Miuchi (Kyoto University) Mr Kiseki Nakamura (Kyoto University) Mr Kojiro Taniue (Kyoto University) Mr Naoki Higashi (Kyoto University) Mr Satoru Iwaki (Kyoto University) Dr Shigeto Kabuki (Kyoto University) Mr Tatsuya Sawano (Kyoto University) Dr Toru Tanimori (Kyoto University) Mr Yoshihiro Matsuoka (Kyoto University) Dr Yuji Kishimoto (Kyoto University)

Presentation Materials