"EMMA, the ISAC-II Recoil Mass Spectrometer"

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EMMA (ElectroMagnetic Mass Analyser) is a recoil mass spectrometer for TRIUMF's ISAC-II facility. ISAC-II will provide intense beams of radioactive ions with masses up to 150 atomic mass units to international scientists studying nuclear structure and nuclear astrophysics at Canada's national subatomic physics lab. The energies of these beams will depend on the specific nuclei being accelerated, but typical top speeds will range from 10-20% of the speed of light. At these energies, different types of nuclear reactions can be studied to learn about the structure of exotic nuclei and the nuclear reactions that produce the chemical elements in stars and stellar explosions. In order to learn about the properties of these nuclei and measure the rates of reactions that produce the chemical elements in stars, it is first necessary to identify the products of these reactions. An atomic nucleus can be uniquely identified by measuring its charge and its mass. The charge of a nucleus is simply the number of protons it contains, while its mass is the sum of the number of neutrons and protons that make it up.