Radio-quiet neutron star Radio-quiet neutron star A radio-quiet neutron star is a neutron star that does not seem to emit radio emissions, but is still visible to Earth through electromagnetic radiation at other parts of the spectrum, particularly x-rays and gamma rays. Most detected neutron stars are pulsars, and emit radio-frequency electromagnetic radiation. About 700 radio pulsars are listed in the Princeton catalog, and all but one emit radio waves at the 400 MHz and 1400 MHz frequencies. That exception is Geminga, which is radio quiet at frequencies above 100 MHz, but is a strong emitter of X-rays and gamma rays. In all,
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