TY - JOUR AU - E Babcock AU - B Chann AU - T Walker AU - W Chen AU - Thomas Gentile C2 - Physical Review Letters DA - 2006-01-01 00:01:00 LA - en M1 - 96 PB - Physical Review Letters PY - 2006 TI - Limits to the Polarization for Spin Exchange Optical Pumping of 3He UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=102996 ER -