Threshold behaviour in photodetachment into a final state with large negative polarizability J. Rohlén, A. O. Lindahl, H. Hultgren, R. D. Thomas, D. J. Pegg and D. Hanstorp EPL, 106 5 (2014) 53001 Published online: 02 June 2014 DOI: 10.1209/0295-5075/106/53001