TY - JOUR AU - D. Gregory AU - Gordon Dunn AU - R. Phaneuf AU - D. Crandall BT - Physical Review A DA - Jan-08-1979 DO - 10.1103/PhysRevA.20.410 PY - 1979 SP - 410 EP - 420 T2 - Physical Review A TI - Absolute cross sections for 2s-2p excitation of N4+ by electron impact VL - 20 SN - 0556-2791 ER -