Experience with NH3 as Target Material for Polarized Proton Targets at the Bonn 2.5 GEV Electron Synchrotron

Polarized target material developments at Bonn and Bochum

“…Very soon after the introduction of NH 3 also its deuterated counterpart ND 3 was investigated with respect to applications as polarized deuteron or neutron target materials. These studies, as well as further investigations into the polarization behavior and the radiation resistance of NH 3 , were performed by W. Meyer et al of the university of Bonn [18]. The samples were frozen either quickly by dropping the liquid ammonia into a liquid nitrogen bath or slowly in form of a crystalline block, which was subsequently crushed into chips of the desired size (1-2mm side length).…”