Experimental Studies on Electronic Configuration Mixing for the Even-Parity Levels of Gd I Using Isotope Shifts Recorded in the Visible Region with FTS

Table 4

List of even-parity energy levels with their experimental LIS Δ𝑇^156,160 (cm⁻¹) values encountered in the present studies. Levels, their configuration, term, and 𝐽 values have been taken from [1].

[1]				LIS Δ𝑇^156,160 (cm^−1)			CI (%) [26]			Suggested CI (%)
Configuration	Term	Level (cm^−1)	𝐽	Experimental	Calculated [26]	Sharing rule	f^7s^2p	f^7dsp	f^7d^2p	f^7s^2p	f^7dsp	f^7d^2p
Δ𝑇^156,160(cm^−1) →							(0.19)	(0.11)	(0.01)	(0.19)	(0.11)	(0.01)
4f^76s^26p	^9P	13433.851^$	3	0.190	—	0.190				100	0	0
		13926.311^$	4	0.190	—	0.190				100	0	0
4f^75d6s6p	^11D	17318.942^a,c	6	0.110	0.110	0.110	0.00	99.89	0.08	0.00	99.89	0.08
4f^75d6s6p	^9F	17380.827	2	0.105	0.105	0.105	5.04	94.69	0.25	5.04	94.69	0.25
		17617.767	3	0.110	0.108	0.110	1.96	97.84	0.20	1.96	97.84	0.20
		17973.611	4	0.110	0.110	0.110	0.53	99.22	0.16	0.53	99.22	0.16
		18509.198	5	0.110	0.110	0.110	0.05	99.76	0.20	0.05	99.76	0.20
4f^75d6s6p	^9D	17749.978	2	0.123	0.117	0.123	10.16	88.53	1.27	17.16	82.53	1.27
		17795.267	3	0.108	0.109	0.108	0.77	97.93	1.27	0.77	97.93	1.27
		17930.516^c	4	0.110	0.109	0.110	0.12	98.64	1.20	0.12	98.64	1.20
		18070.257	6	0.104	0.109	0.104	0.00	99.08	0.93	0.00	99.08	0.93
		18083.642^c	5	0.108	0.109	0.108	0.14	98.75	1.06	0.14	98.75	1.06
4f^75d6s6p	^7P	24458.988^b	2	0.111	0.113	0.111	4.24	95.55	0.17	4.24	95.55	0.17
4f^75d6s6p	^7D	24988.884^b,c	4	0.092	0.109	0.092	0.10	99.10	0.78	0.10	81.82	18.01
4f^75d6s6p	^7F	26615.044^a,b	5	0.038	—	0.038	—	—	—	0.00	28.00	72.00
4f^75d6s6p		26866.385	4	0.060	—	0.060	—	—	—	0.07	50.10	49.90
4f^75d6s6p	—	23215.028^c	2	0.061	0.109	0.061	0.10	99.09	0.75	0.53	50.24	49.23
4f^75d6s6p	—	23389.782^c	3	0.060	0.109	0.060	0.07	99.10	0.79	0.07	50.10	49.90
4f^75d6s6p	—	23644.156^c	4	0.067	0.109	0.067	0.02	99.13	0.82	0.02	57.00	42.98
4f^75d6s6p	—	23999.912^c	5	0.068	0.109	0.068	0.00	99.17	0.82	0.20	57.50	42.3
4f^75d6s6p	—	24430.425^c	6	0.068	0.110	0.068	0.00	98.99	0.99	0.20	57.50	42.3
4f^75d6s6p	—	24849.514^b,c	4	0.068	0.110	0.068	0.04	99.19	0.74	0.20	57.50	42.3
4f^75d6s6p	—	25043.649^b,c	5	0.067	0.109	0.067	0.14	98.83	0.98	0.02	57.00	42.98
4f^75d6s6p	—	25376.313^c	7	0.048	0.110	0.048	0.00	99.54	0.45	0.00	38.01	61.99
4f^75d6s6p	—	27425.245^a	4	0.092	—	0.092				0.10	81.82	18.01
4f^75d6s6p?	—	30809.375^c,d	3	0.080	—	0.080				0.00	70.00	30.00
4f^75d^26p	^9G	30505.374^c,d	7	0.010	—	0.010				0.00	0.00	100.0
4f^75d^26p	^9F^#	23103.660^c	1	0.061	0.109	0.061	0.00	99.23	0.76	0.53	50.24	49.23
		30694.874^c,d	2	0.038		0.038				0.00	28.00	72.00
		31135.795^b,c,d	4	0.033	—	0.033				0.05	23.0	76.94
		32091.730^a,b,d	6	0.005	—	0.005				0.00	0.00	100
4f^75d^26p?	^9G?	34836.980	4	0.078	—	0.078				0.16	68.00	31.84
—	^9F?	28504.435^d	7	0.078	—	0.078				0.16	68.00	31.84
—	^9F?	28731.590^d	6	0.042	—	0.042				0.00	31.00	69.00
—	^9F?	29119.955^a	5	0.077	—	0.077				0.16	67.09	32.75
—	^9F?	29426.450^c, d	3	0.067	—	0.067				0.02	57.00	42.98
—	—	30394.640^c	2	0.100	—	0.100				0.10	90.00	09.90
—	—	33704.627^a	3	0.068	—	0.068				0.20	57.50	42.30
—	—	34147.343^a	2	0.084	—	0.084				0.05	74.00	25.95
—	—	36147.130^c	6	0.010	—	0.010				0.00	0.0	100

^aThis level has been encountered in [6]. ^bThis level has been encountered in [7]. ^cThis level has been encountered in [8]. ^dThis level has been encountered in [9]. ^#Term assignment of the level at 23103 cm⁻¹ (𝐽=1) has been taken from [26]. ^$The LIS Δ𝑇^156,160 (cm⁻¹) values of these levels have been derived from Δ𝜎^156,160 reported by Jin et al. [16].