摘要 : We report the use of photoassociative spectroscopy to determine the ground-state .s-wave scattering lengths for the main bosonic isotopes of strontium, ~(86)Sr and ~(88)Sr. Photoassociative transitions are driven with a laser red ... 展开 We report the use of photoassociative spectroscopy to determine the ground-state .s-wave scattering lengths for the main bosonic isotopes of strontium, ~(86)Sr and ~(88)Sr. Photoassociative transitions are driven with a laser red detuned by up to 1400 GHz from the ~1S_0-~1P_1 atomic resonance at 461 nm. A minimum in the transition amplitude for ~(86)Sr at -494 ± 5 GHz allows us to determine the scattering lengths 610a_0 < a_(86) < 2300a_0 for ~(86)Sr and a much smaller value of -1a_0 < a_(88) < 13a_0 for ~(88)Sr. 收起