Forbidden Transitions in the Ground State Configuration of Doubly Ionized Argon

Table 1

Transition energies, Δ𝐸 (cm⁻¹), line strengths, 𝑆 (a.u.), and transition probabilities, 𝐴_ki (s⁻¹), for forbidden transitions (M1 and E2) of the ground state 3s²3p⁴ configuration for Ar III. In table, 𝑎(𝑏) denotes 𝑎×10^𝑏.

Transitions	Δ𝐸		𝑆		𝐴ki
	This work	Other works	This work	Other works	This work	Other works
M1 transitions
^3P1-^1S0	33734.36	32153.53^a; 32135^d; 32155^e; 30688^g; 30122.89^h	3.36 (−3)	4.48 (−3)^a	3.48	4.02^a; 3.972^d; 3.91^f
^3P2-^1D2	—	14010.0^a; 13972^d; 14010^e; 17305.26^g; 16328.91^h	—	2.16 (−3)^a	—	3.21 (−2)^a; 4.5 (−1)^b; 3.2 (−1)^c; 3.23 (−1)^d; 3.13 (−1)^f
^3P1-^1D2	14914.19	12897.83^a; 12865^d; 12898^e; 17647.36^g; 15275.43^h	4.70 (−3)	7.2 (−3)^a	8.41 (−2)	8.3 (−2)^a; 12 (−2)^b; 8.5 (−2)^c; 8.43 (−2)^d; 8.22 (−2)^f
^3P2-^3P1	1008.28	1112.17^a; 1107^d; 1112^e; 1131.74^g; 1053.41^h	2.50	2.50^a	2.30 (−2)	3.1 (−2)^a; 3.1 (−2)^c; 3.054 (−2)^d; 3.08 (−2)^f
^3P1-^3P0	428.35	458.06^a; 463^d; 458^e; 468.96^g; 449.92^h	2.00	2.00^a	4.23 (−3)	5.19 (−3)^a; 5.2 (−3)^c; 5.354 (−3)^d; 5.17 (−3)^f
E2 transitions
^3P2-^1S0	34742.64	33265.7^a; 33242^d; 33267^e; 31819.69^g; 31176.37^h	4.46 (−3)	9.4 (−3)^a	2.53 (−2)	4.3 (−2)^a; 3.493 (−2)^d; 4.17 (−2)^f
^1D2-^1S0	18820.16	19255.7^a; 19271^d; 19257^e; 14514.43^g; 14847.46^h	0.87 (1)	1.05 (1)^a	2.30	3.10^a; 2.693^d; 2.59^f
^3P2-^1D2	—	14010.0^a; 13972^d; 14010^e; 16328.91^h	—	1.2 (−1)^a	—	1.4 (−3)^a; 2.9(−3)^c; 1.362 (−3)^d; 1.14 (−3)^f
^3P1-^1D2	14914.19	12897.83^a; 12865^d; 12898^e; 15704.55^g; 15275.43^h	1.08 (−2)	1.6 (−2)^a	1.78 (−4)	1.3 (−4)^a; 2.7 (−4)^c; 1.349 (−4)^d; 1.14 (−4)^f
^3P0-^1D2	14485.85	12439.77^a; 12402^d; 12440^e; 14825.51^h	3.17 (−3)	4.3 (−3)^a	4.52 (−5)	2.9 (−5)^a; 7.0 (−5)^b; 5.8 (−5)^c; 2.038 (−5)^d; 2.21 (−5)^f
^3P2-^3P0	1436.63	1570.23^a; 1570^d; 1570^e; 1600.70^g; 1503.41^h	2.46	2.54^a	1.69 (−6)	2.72 (−6)^a; 5.6 (−5)^c; 2.784 (−6)^d; 2.37 (−6)^f
^3P2-^3P1	1008.28	1112.17^a; 1107^d; 1112^e; 1131.74^g; 1053.48^h	5.50	5.7^a	2.14 (−7)	3.6 (−7)^a; 7.4 (−7)^c; 3.617 (−7)^d; 3.13 (−7)^f

aRef. [14], ^bRef. [27], ^cRef. [26], ^dRef. [22], ^eRef. [40], ^fRef. [24], ^gRef. [6], and ^hRef. [37].