A Note About Beam Depolarization
نویسنده
چکیده
Ionizing radiation increases the nuclear spin relaxation in the target chamber. Also known as “beam depolarization,” it is essentially a two step process. First, the beam ionizes an 3He atom which results in an free electron and an atomic ion 3He+. There is also the possibility that the atomic ion bonds with an neutral 3He atom to form an molecular ion He2 . Second, interactions with 3He ions induce 3He nuclear spin flips. Therefore, the total relaxation rate due to ionization by the beam is given by:
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