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- W3157465720 abstract "• Lifetime is 9 – 20 and 12 – 22 μs for the A 2 Π 1/2 and A 2 Π 3/2 states, respectively. • B 2 Σ + 1/2 –A 2 Π 3/2 , B 2 Σ + 1/2 –A 2 Π 1/2 and C 2 Π 3/2 –A 2 Π 1/2 transitions are strong. • C 2 Π 3/2 – X 2 Σ + 1/2 , C 2 Π 1/2 – X 2 Σ + 1/2 and C 2 Π 1/2 –A 2 Π 3/2 transitions are the strongest. • b 4 Δ 1/2 –X 2 Σ + 1/2 , b 4 Δ 1/2 –A 2 Π 3/2 and b 4 Δ 1/2 –A 2 Π 1/2 forbidden transitions are the strongest. • Lifetimes are 361 – 553 and 298 – 513 ns for the C 2 Π 1/2 and C 2 Π 3/2 states, respectively. A number of experiments have been performed to measure the transition properties of the low–lying states of boron monosulfide; however, only a few theoretical results have been reported in the literature. Thus, the transition properties of several of the lowest–lying states are investigated herein. The potential energy curves of the Ω states generated from the X 2 Σ + , A 2 Π, B 2 Σ + , C 2 Π, a 4 Σ + , and b 4 Δ states and the transition dipole moments between them were calculated using icMRCI approach. The radiative lifetimes of the first 16 levels were of the order of 9 – 20, 12 – 22, and 1.3 – 6.5 μs for the A 2 Π 1/2 , A 2 Π 3/2 , and B 2 Σ + 1/2 states, respectively; those were approximately 361 – 553 and 298 – 513 ns for the C 2 Π 1/2 and C 2 Π 3/2 states, respectively. The C 2 Π 3/2 – X 2 Σ + 1/2 , C 2 Π 1/2 – X 2 Σ + 1/2 , and C 2 Π 1/2 – A 2 Π 3/2 transitions were the strongest, followed by the B 2 Σ + 1/2 – A 2 Π 3/2 , B 2 Σ + 1/2 – A 2 Π 1/2 , and C 2 Π 3/2 – A 2 Π 1/2 transitions. The transitions from the a 4 Σ + and b 4 Δ states to the X 2 Σ + state were evaluated. The radiative lifetimes of the first 16 levels were of the order of 3.2 – 6.0, 8.9 – 17.3, and 61 – 7644 ms for the a 4 Σ + 3/2 , a 4 Σ + 1/2 , and b 4 Δ 5/2 , respectively; those were approximately 15 – 1430 and 7 – 1006 μs for the b 4 Δ 3/2 and b 4 Δ 1/2 states, respectively. Among these forbidden transitions, the emissions from the b 4 Δ 1/2 – X 2 Σ + 1/2 , b 4 Δ 1/2 – A 2 Π 3/2 , b 4 Δ 1/2 – A 2 Π 1/2 , b 4 Δ 1/2 – X 2 Σ + 1/2 , b 4 Δ 1/2 – A 2 Π 3/2 , and b 4 Δ 1/2 – A 2 Π 1/2 systems were strong. The distribution of the radiative lifetime at a level υ versus the rotational quantum number J was evaluated for the A 2 Π 1/2 , A 2 Π 3/2 , B 2 Σ + 1/2 , C 2 Π 1/2 , and C 2 Π 3/2 states. The radiative lifetimes are 9 – 20, 12 – 22, and 1.3 – 6.5 μs for the A 2 Π 1/2 , A 2 Π 3/2 , and B 2 Σ + 1/2 states, respectively; those were 361 – 553 and 298 – 513 ns for the C 2 Π 1/2 and C 2 Π 3/2 states, respectively; these are of the order 3.2 – 6.0, 8.9 – 17.3, and 61 – 7644 ms for the a 4 Σ + 3/2 , a 4 Σ + 1/2 , and b 4 Δ 5/2 , respectively; those were 15 – 1430 and 7 – 1006 μs for the b 4 Δ 3/2 and b 4 Δ 1/2 states, respectively. The C 2 Π 3/2 – X 2 Σ + 1/2 , C 2 Π 1/2 – X 2 Σ + 1/2 , and C 2 Π 1/2 – A 2 Π 3/2 transitions are strongest, followed by the B 2 Σ + 1/2 – A 2 Π 3/2 , B 2 Σ + 1/2 – A 2 Π 1/2 , and C 2 Π 3/2 – A 2 Π 1/2 transitions. The b 4 Δ 1/2 – X 2 Σ + 1/2 transition is the strongest, followed by the b 4 Δ 1/2 – A 2 Π 3/2 and b 4 Δ 1/2 – A 2 Π 1/2 forbidden transitions. The strong emissions from the A 2 Π 3/2 – X 2 Σ + 1/2 and A 2 Π 1/2 – X 2 Σ + 1/2 systems are mainly in the visible region; only a small number are in the IR and UV regions. The strong emissions from the B 2 Σ + 1/2 – X 2 Σ + 1/2 , C 2 Π 1/2 – A 2 Π 3/2 , C 2 Π 1/2 – A 2 Π 1/2 , C 2 Π 3/2 – A 2 Π 3/2 , and C 2 Π 3/2 – A 2 Π 1/2 systems are located in the UV and visible region; those from the B 2 Σ + 1/2 – A 2 Π 3/2 and B 2 Σ + 1/2 – A 2 Π 1/2 transitions are in the visible region; those from the C 2 Π 3/2 – X 2 Σ + 1/2 and C 2 Π 1/2 – X 2 Σ + 1/2 systems are in the UV region; those from C 2 Π 3/2 – B 2 Σ + 1/2 and C 2 Π 1/2 – B 2 Σ + 1/2 systems are of IR light." @default.
- W3157465720 created "2021-05-10" @default.
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- W3157465720 date "2021-09-01" @default.
- W3157465720 modified "2023-09-24" @default.
- W3157465720 title "Transition properties of X2Σ+, A2Π, B2Σ+, C2Π, a4Σ+, and b4Δ states of boron monosulfide" @default.
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