This white paper discusses the current landscape and prospects for experiments sensitive to
particle dark matter processes producing photons and cosmic rays. Much of the gamma-ray …

MeV gamma-rays provide a unique window for the direct measurement of line emissions
from radioisotopes, but observations have made little significant progress since COMPTEL …

Imaging of nuclear gamma-ray lines in the 1–10 MeV range is far from being established in
both medical and physical applications. In proton therapy, 4.4 MeV gamma rays are emitted …

Considerable amounts of radioactive substances (mainly 137 Cs and 134 Cs) were
released into the environment after the Japanese nuclear disaster in 2011. Some restrictions …

The observation of a radioactively powered kilonova AT 2017gfo associated with the
gravitational wave event GW170817 from a binary neutron star merger proves that these …

The discovery of a binary neutron star merger (NSM) through both its gravitational wave and
electromagnetic emission has revealed these events to be key sites of r-process …

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 …

Novae and supernovae play a key role in many fields of Astrophysics and Cosmology.
Despite their importance, an accurate description of which objects explode and why and …

In gamma-ray astronomy, the 1–10 MeV range is one of the most challenging energy bands
to observe owing to low photon signals and a considerable amount of background …

To propose a novel monitoring method for the quantitative visualization of 3D distribution of
a radioactive plume in the vicinity of release point and source term estimation of released …