Table 4: Fine structure energy levels (in Rydbergs) for the current calculation and the work of Bhatia & Landi (2007), along with the observed values from NIST.

	LS state	J-value	J-index	NIST	This work	Bhatia
1	2s2 1S	0	1	0.0000	0.0000	0.0000
2	2s2p 3P	0	2	1.2804	1.2962	1.2880
		1	3	1.2906	1.3071	1.2989
		2	4	1.3131	1.3293	1.3230
3	2s2p 1P	1	5	2.4758	2.5632	2.5457
4	2p2 3P	0	6	3.3339	3.4624	3.3727
		1	7	3.3458	3.3741	3.3853
		2	8	3.3656	3.3954	3.4063
5	2p2 1D	2	9	3.6915	3.7737	3.7742
6	2p2 1S	0	10	4.5530	4.6524	4.6851
7	2s3s 3S	1	11	13.9647	13.9704	13.9410
8	2s3s 1S	0	12	14.1983	14.2070	14.1799
9	2s3p 1P	1	13	14.5220	14.5346	14.5096
10	2s3p 3P	0	14	14.5575	14.5603	14.5315
		1	15	14.5575	14.5637	14.5351
		2	16	14.5575	14.5690	14.5405
11	2s3d 3D	1	17	14.8631	14.9139	14.8462
		2	18	14.8643	14.9151	14.8475
		3	19	14.8657	14.9169	14.8495
12	2s3d 1D	2	20	15.0776	15.1261	15.0878
13	2p3s 3P	0	21	15.5839	15.6021	15.5745
		1	22	15.5941	15.6128	15.5854
		2	23	15.6182	15.6370	15.6102
14	2p3s 1P	1	24	15.8837	15.8724	15.8453
15	2p3p 1P	1	25	15.9300	15.9550	15.9192
16	2p3p 3D	1	26	15.9970	16.0247	15.9870
		2	27	16.0061	16.0362	15.9986
		3	28	16.0289	16.0586	16.0214
17	2p3p 3S	1	29	16.1329	16.1608	16.1258
18	2p3p 3P	0	30	-	16.2188	16.1962
		1	31	16.2086	16.2288	16.2064
		2	32	16.2205	16.2414	16.2198
19	2p3d 1D	2	33	16.3084	16.3581	16.2968
20	2p3d 3F	3	34	-	16.3676	16.2843
			35	-	16.3684	16.2660
		4	36	-	16.3857	16.3029
21	2p3p 1D	2	37	16.3652	16.4129	16.3892
22	2p3d 3D	1	38	16.4695	16.5033	16.4619
		2	39	16.4744	16.5079	16.4669
		3	40	16.4835	16.5166	16.4764
23	2p3d 3P	2	41	16.5415	16.5892	16.5382
		1	42	16.5505	16.5972	16.5461
		0	43	16.5553	16.6014	16.5501
24	2p3p 1S	0	44	-	16.7044	16.6815
25	2p3d 1F	3	45	16.7189	16.7879	16.7492
26	2p3d 1P	1	46	16.7815	16.8213	16.7998