TY - JOUR KW - pfc AU - Markus Greiner AU - Cindy Regal AU - Deborah Jin BT - Phys. Rev. Lett. DA - 2005-01 DO - 10.1103/PhysRevLett.94.070403 N1 - JILA Pub. 7382 PY - 2005 EP - 070403 T2 - Phys. Rev. Lett. TI - Probing the excitation spectrum of a Fermi gas in the BCS-BEC crossover regime VL - 94 ER -