Frequency shifts of photoassociative spectra of ultracold metastable helium atoms: A new measurement of the -wave scattering lengthJ. Kim, S. Moal, M. Portier, J. Dugué, M. Leduc and C. Cohen-TannoudjiEurophys. Lett., 72 4 (2005) 548-554DOI: https://doi.org/10.1209/epl/i2005-10275-y