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Hyperpolarized Instruments



        The principle that enables researchers to generate hyperpolarization in gases (e.g. hyperpolarized 129Xe or 3He) via spin exchange collisions. The collisions are mainly binary collisions that depend on thermal velocity at high pressures and also short-lived van der Waals interactions or three-body collisions that depend on the partial pressure at low pressure.

        The basic structure diagram of the 129Xe hyperpolarizer is shown above.  It features an optical cell used for optical pumping and spin-exchange collisions, collection system, gas supply system, vacuum system.  A computer is used for monitoring and controlling the process.