TY - JOUR AU - Gensemer, S AU - Gould, P AU - Leo, P AU - Tiesinga, Eite AU - Williams, Carl C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 2000-01-01 00:01:00 LA - en M1 - 62 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 2000 TI - Ultracold 87Rb Ground State Hyperfine Changing Collisions in the Presence and Absence of Laser Light ER -