A gas cell for stopping, storing and polarizing radioactive particles
  A radioactive beam of 20Na is stopped in a gas cell filled with Ne gas. The stopped particles are polarized by optical pumping. The degree of polarization that can be achieved is studied. A maximum polarization of 50% was found. The dynamic processes in the cell are described with a phenomenological model. 
A. Sytema, J.E. van den Berg, O. B\"oll, D. Chernowitz, E.A. Dijck,   J.O. Grasdijk, S. Hoekstra, K. Jungmann, S.C. Mathavan...
physics.ins-det nucl-ex