Since the accident at the Fukushima Daiichi Nuclear Power Plant∼ 10 years ago, various
studies have been conducted focusing on the decontamination of radioactive materials and …

Abstract The Fukushima Daiichi Nuclear Power Plant was severely damaged during the
2011 Great East Japan Earthquake. However, the ongoing decommissioning work has been …

We developed a high-precision color gamma-ray image sensor with fine spatial resolution
that is cost effective, widely applicable, and very sensitive, by using a diced Ce-doped Gd 3 …

We developed a pinhole gamma camera to measure distributions of radioactive material
contaminants and to identify radionuclides in extraordinarily high dose regions (1000 …

After Fukushima's nuclear disaster in Japan, the decontamination operation is successfully
ongoing, and restrictions from some areas were lifted in April 2017. However, the radiation …

We report the development of a monolithic MPPC array, which consists of 3× 3 mm 2
elements arranged as a 4× 4 array manufactured by Hamamatsu applicable to next …

Imaging is an effective way to survey gamma radiation hotspots in nuclear safety, public
health and homeland security applications. The existing gamma imagers either equip a …

The release of radioactive isotopes (mainly 137 Cs, 134 Cs and 131 I) from the crippled
Fukushima Daiichi Nuclear Plant remains a serious problem in Japan. To help identify …

The development of remote and quick radiation imaging methods for high dose-rate
environments is important to accelerate decommissioning of the Fukushima Daiichi Nuclear …

A new type of MeV gamma-ray imaging detector in the energy band from 0.2 to 30MeV,
based on a gaseous time projection chamber with Micro Pixel Chamber (Micro-TPC), is …