Based on the selection of appropriate active space and basis sets, and consideration of various physical effects (scalar relativistic effect, core-valence electron correlation, complete basis set limit and spin-orbit coupling effect), the precise ionization energies of X
3Σ
-/a
1Δ/b
1Σ
+/A
3Π/ c
1Π(OH
+)←X
2Π(OH), as well as the potential energy curves of 14 Λ-S and 27 Ω states of OH
+are obtained by using the optimized icMRCI + Q method. The transition dipole moments between six Ω states[X
3Σ
0+
-, X
3Σ
1
-, (1)2, (2)2, (2)1, and (1)0
-] are obtained by using the all electron icMRCI/cc-pCV5Z + SOC theory. The ionization energies, spectroscopic and vibrational-rotational transition data obtained in this paper are in good agreement with the existing measurements. We found that: 1) The radiation lifetimes of (1)2(
υ' = 0-6,
J' = 2, +) gradually decrease with increasing
υ', while the radiation widths correspondingly increase; the spontaneous emissions of (1)2(
υ' = 0-6,
J' = 2, +)- X
3Σ
1
-(
υ′′, J′′ = 1, -) are weak. 2) The radiation lifetimes of (2)2
1st well(
υ' = 0-2,
J' = 2, +), (2)1(
υ' = 0-9,
J' = 1, +), and (1)0
-(
υ' = 0-8,
J' = 0, +) all gradually increase as
υ' increases, concurrently, their radiation widths narrow with increasing
υ'; the spontaneous emissions of (2)2
1st well(
υ' = 0-2,
J' = 2, +)- X
3Σ
1
-(
υ′′, J′′ = 1, -), (2)1(
υ' = 0-9,
J' = 1, +)- (
υ′′, J′′ = 1, -), and (1)0
-(
υ' = 0-8,
J' = 0, +)- X
3Σ
1
-(
υ′′, J′′ = 1, -) are strong. 3) The radiation lifetimes of (2)2
1st well(
υ' = 0-2, +), (2)1(
υ' = 0-9, +), and (1)0
-(
υ' = 0-8, +) all gradually increase with the increase of
J'. The datasets presented in this paper, including the potential energy curves of 14 Λ-S and 27 Ω states, 7 pairs of transition dipole moments between the 6 Ω states [X
3Σ
0+
-, X
3Σ
1
-, (1)2, (2)2, (2)1, (1)0
-], and distributions of the radiative lifetime varying as the
J' of the (2)21st well(
υ' = 0 - 2, +), (2)1(
υ' = 0-9, +), and (1)0
-(
υ' = 0-8, +) states, are openly available at https://www.doi.org/10.57760/sciencedb.j00213.00058. (Data private access link https://www.scidb.cn/s/B7buIr)
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