TY - JOUR AU - John Cooper BT - Journal of Physics B: Atomic and Molecular Physics DA - Apr-04-1988 DO - 10.1088/0022-3700/19/8/005 PY - 1986 SP - L285 EP - L289 T2 - Journal of Physics B: Atomic and Molecular Physics TI - On radiative modifications of electron-ion cross sections in the vicinity of an excitation threshold VL - 19 SN - 0022-3700 ER -