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 …

We have developed an omnidirectional gamma-ray imaging Compton camera for
environmental monitoring at low levels of radiation. The camera consisted of only six CsI (Tl) …

After the nuclear disaster in Fukushima, radiation decontamination has become particularly
urgent. To help identify radiation hotspots and ensure effective decontamination operation …

We present experimental protocols for visualizing various low-level gamma radiation
sources in the ambient environment. Experiments were conducted by using a low-cost, high …

Gamma-ray imagers with the potential for visualizing the distribution of radioactive materials
are required in the fields of astrophysics, medicine, nuclear applications, and homeland …

An electron-tracking Compton camera (ETCC) is a detector that can determine the arrival
direction and energy of incident sub-MeV/MeV gamma-ray events on an event-by-event …

We developed an all-sky Compton camera for the detection of sub-MeV gamma rays emitted
by radioactive cesium in high-dose environments. The camera consisted of six NaI (Tl) …

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 …

Abstract The Fukushima Daiichi Nuclear Power Station (FDNPS), operated by Tokyo Electric
Power Company Holdings, Inc., went into meltdown after the large tsunami caused by the …

The Compton camera is a viable and convenient tool used to visualize the distribution of
radioactive isotopes that emit gamma rays. After the nuclear disaster in Fukushima in 2011 …