Threshold behaviour in photodetachment into a final state with large negative polarizabilityJ. Rohlén, A. O. Lindahl, H. Hultgren, R. D. Thomas, D. J. Pegg and D. HanstorpEPL, 106 5 (2014) 53001DOI: https://doi.org/10.1209/0295-5075/106/53001