TY - JOUR AU - Cindy Regal AU - Deborah Jin BT - Physical Review Letters DA - 2003-06 DO - 10.1103/PhysRevLett.90.230404 PY - 2003 EP - 230404 T2 - Physical Review Letters TI - Measurement of Positive and Negative Scattering Lengths in a Fermi Gas of Atoms VL - 90 SN - 0031-9007 ER -