THE 2S(2)2P3S P-1,3(J)DEGREES-]2S(2)2P(2) AND 2S(2)2P3P LSJ OSCILLATOR-STRENGTHS IN N-II

A comparison between the recent measurements [Musielok et al., Phys. R ev. A53, 3122 (1996)] of the relative oscillator strengths for all lin es in the three multiplets comprising the 2p3s-2p3p transition array i n NII, and theoretical configuration interaction calculations performe d with the CIV3 code [Bell et al., Physica Scripta 52, 240 (1995)] sho ws that, although the agreement between the experimental data and the theoretical results is good for allowed transitions, some unexpected d eviations occur for the intersystem lines. In this work, we show that the previous theoretical work can be improved and some significant dis crepancies with experiment eliminated by increasing the accuracy of th e calculated energy difference between the 2p3s P-3(1)o and P-1(1)o st ates. This is achieved by the inclusion of additional orbitals and con figurations together with adjustment of the diagonal matrix elements o f the Hamiltonian. The new theoretical results for the transitions 2p3 s P-1,3(J)o --> 2p(2) and 2p3p LSJ are compared with other theoretical work and with the experimental data.