Six Partners (funded by the European Commission) and five Observers (not funded by the European Commission) participate in the NSF Joint Research Activity. The involvement of each participant in the various tasks is summarised in the following table:

Tasks	Partners	Observers
Development of spin exchange optical pumping stations (SEOP)	P3 - Forschungszentrum Jülich P5 - CCLRC/RAL/ISIS Facility	O1 - Indiana University Cyclotron Facility O2 - NIST/Physics Laboratory/Ionizing Radiation Div. O3 - ORNL, Spallation Neutron Source O4 - HEARO/Neutron Science Laboratory O5 - University of Michigan/Randall Laboratory
Development of metastable exchange optical pumping stations (MEOP)	P1 - Institut Laue-Langevin P4 - Hahn-Meitner Institut P5 - CCLRC/RAL/ISIS Facility P6 - FRM-II, Technical University of München	O1 - Indiana University Cyclotron Facility O2 - NIST/Physics Laboratory/Ionizing Radiation Div. O3 - ORNL, Spallation Neutron Source
Development of polarised 3He containers	P1 - Institut Laue-Langevin P2 - CEA-Grenoble, MDN Laboratory P3 - Forschungszentrum Jülich P4 - Hahn-Meitner Institut P5 - CCLRC/RAL/ISIS Facility P6 - FRM-II, Technical University of München	O1 - Indiana University Cyclotron Facility O2 - NIST/Physics Laboratory/Ionizing Radiation Div. O3 - ORNL, Spallation Neutron Source O4 - HEARO/Neutron Science Laboratory O5 - University of Michigan/Randall Laboratory
Development of magneto-static chambers	P1 - Institut Laue-Langevin P2 - CEA-Grenoble, MDN Laboratory P4 - Hahn-Meitner Institut P5 - CCLRC/RAL/ISIS Facility	O1 - Indiana University Cyclotron Facility O2 - NIST/Physics Laboratory/Ionizing Radiation Div. O3 - ORNL, Spallation Neutron Source O4 - HEARO/Neutron Science Laboratory O5 - University of Michigan/Randall Laboratory