An apparatus, system, and methods for polarizing nuclei of a noble gas are disclosed. The disclosed system may include a polarization apparatus configured to polarize a noble gas mixture including xenon-129. The disclosed system also may include separate volumes for (1) saturating the polarizable noble gas mixture with alkali metal vapor, (2) desaturating said noble gas mixture from its alkali metal vapor after polarization is completed, (3) intermediate storage of the resultant polarized noble gas mixture, and (4) transfer of said polarized noble gas mixture to a storage vessel (e.g., a delivery bag). The disclosed system further may include separate reservoirs for (1) the noble gas(es) to be polarized, (2) lightweight gas(es) to displace the noble gas(es), and (3) a heavy inert gas (e.g., such as natural xenon) to push the polarized noble gas(es) into a storage vessel.