Table 5: The measured and calculated oscillator strength (f-values) of the 2s2p² ⁴P $\to$ 2s2pnd ⁴P, ⁴D transitions for N²⁺, O³⁺, and F⁴⁺. Exp: present experimental data; RM: R-matrix calculation by Fernley et al. (1999); MCDF: Multi-Configuration Dirac-Fock calculations performed as part of the present work (N²⁺ and F⁴⁺) or by Champeaux et al. (2003, O³⁺).
Transition Oscillator strength Ratio

ion n Exp RM MCDF $\frac{{\rm Exp}}{{\rm RM}}$ $\frac{{\rm Exp}}{{\rm MCDF}}$

N²⁺ 5 0.004126 0.0740 0.08717 0.06 0.05

6 0.003079 0.0238 0.05555 0.13 0.06

7 0.002656 0.0205 0.02146 0.13 0.12

8 0.001437 0.0138 0.01947 0.10 0.07

9 0.001076 0.0096 0.00925 0.11 0.12

O³⁺ 5 0.002695 0.0704 0.06270 0.04 0.04

6 0.002388 0.0374 0.03037 0.06 0.08

7 0.002501 0.0223 0.01630 0.11 0.15

8 0.002241 0.0145 0.00955 0.15 0.23

9 0.001998 0.0100 0.00571 0.20 0.35

10 0.001206 0.0070 0.00566 0.17 0.21

F⁴⁺ 6 0.004945 0.0724 0.04480 0.07 0.11

7 0.002717 0.0379 0.02566 0.07 0.11

8 0.002055 0.0227 0.01642 0.09 0.13

9 0.002247 0.0151 0.03253 0.15 0.07

**Table 5:** The measured and calculated oscillator strength (f-values) of the 2s2p² ⁴P $\to$ 2s2pnd ⁴P, ⁴D transitions for N²⁺, O³⁺, and F⁴⁺. Exp: present experimental data; RM: R-matrix calculation by Fernley et al. (1999); MCDF: Multi-Configuration Dirac-Fock calculations performed as part of the present work (N²⁺ and F⁴⁺) or by Champeaux et al. (2003, O³⁺).
Transition	Oscillator strength	Ratio
ion	n	Exp	RM	MCDF	$\frac{{\rm Exp}}{{\rm RM}}$	$\frac{{\rm Exp}}{{\rm MCDF}}$
N²⁺	5	0.004126	0.0740	0.08717	0.06	0.05
	6	0.003079	0.0238	0.05555	0.13	0.06
	7	0.002656	0.0205	0.02146	0.13	0.12
	8	0.001437	0.0138	0.01947	0.10	0.07
	9	0.001076	0.0096	0.00925	0.11	0.12
O³⁺	5	0.002695	0.0704	0.06270	0.04	0.04
	6	0.002388	0.0374	0.03037	0.06	0.08
	7	0.002501	0.0223	0.01630	0.11	0.15
	8	0.002241	0.0145	0.00955	0.15	0.23
	9	0.001998	0.0100	0.00571	0.20	0.35
	10	0.001206	0.0070	0.00566	0.17	0.21
F⁴⁺	6	0.004945	0.0724	0.04480	0.07	0.11
	7	0.002717	0.0379	0.02566	0.07	0.11
	8	0.002055	0.0227	0.01642	0.09	0.13
	9	0.002247	0.0151	0.03253	0.15	0.07

Source LaTeX | All tables | In the text

	1 Introduction
	2 Experimental
	3 MCDF calculations
	4 Results
	5 Concluding remarks
	References