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Development of microwave cavities for measurement of muonium hyperfine structure at J-PARC
K. S. Tanaka, M. Iwasaki, O. Kamigaito +16
The MuSEUM collaboration is planning measurements of the ground-state hyperfine structure (HFS) of muonium at the Japan Proton Accelerator Research Complex (J-PARC), Materials and…
First On-Site True Gamma-Ray Imaging-Spectroscopy of Contamination near Fukushima Plant
Dai Tomono, Tetsuya Mizumoto, Atsushi Takada +5
We have developed an Electron Tracking Compton Camera (ETCC), which provides a well-defined Point Spread Function (PSF) by reconstructing a direction of each gamma as a point and r…
Establishment of Imaging Spectroscopy of Nuclear Gamma-Rays based on Geometrical Optics
Toru Tanimori, Yoshitaka Mizumura, Atsushi Takada +16
Since the discovery of nuclear gamma-rays, its imaging has been limited to pseudo imaging, such as Compton Camera (CC) and coded mask. Pseudo imaging does not keep physical informa…
Enhancement of muonium emission rate from silica aerogel with a laser ablated surface
G. A. Beer, Y. Fujiwara, S. Hirota +24
Emission of muonium () atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation was used to create hole-like regions with dia…
The K1.8BR spectrometer system at J-PARC
Keizo Agari, Shuhei Ajimura, George Beer +81
A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate interactions and -nuclear bo…