Radio-quiet neutron star ten bodies have been proposed as rotation-powered neutron stars that are not visible as radio sources, but are visible as x–ray and gamma ray sources. Indicators that they are indeed neutron stars include them having a high x-ray to lower frequencies emission ratio, a constant x-ray emission profile, and coincidence with a gamma ray source. Quark stars, theoretical neutron star-like objects composed of quark matter, may be radio quiet, according to some theories. More plausibly, however, radio-quiet neutron stars may simply be pulsars which do not pulse in our direction. As pulsars spin, it is theorized they emit radiation from
Canadian Neutron Beam Centre suite of 6 beamlines at the CNBC. The neutron beam laboratory known as Canadian Neutron Beam Centre was transferred from AECL to the National Research Council in 1997. The NRU reactor, closed in March 2018, was a multi-purpose research reactor that supported science and industry in three areas simultaneously: 1. It was Canada's only major neutron source, supplying neutrons for the CNBC. 2. It was Canada's only major materials testing reactor, supporting nuclear energy research and development. 3. It was one of the two largest global producers of medical radioisotopes. Canadian Neutron Beam Centre The NRC Canadian Neutron Beam Centre