Inelastic fine rotational cross-sections of the magnesium monohydroxide (MgOH) molecule by collision with helium (He) atoms are investigated. We illustrate the two-dimensional potential energy surface (2D-PES) for the MgOH–He interacting system. The ab initio 2D-PES is computed using the restricted coupled cluster approach with single, double, and perturbative triple excitation connected to an augmented-correlation consistent-polarized valence quadruple zeta Gaussian basis set. One minimum located at (θ = 0; R = 8.25 bohr) on the side of the hydrogen atom is observed. Inelastic cross-sections are investigated for the 13 first fine rotational levels for a total energy up to 100 cm⁻¹. Propensity rules toward odd ΔN and ΔN = Δj are found.

研究了氢氧化镁（MgOH）分子与氦（He）原子碰撞产生的非弹性精细旋转截面。我们说明了MgOH-He相互作用系统的二维势能面（2D-PES）。在从头2D-PES是使用与连接至增强相关一致极化价四倍ζ电高斯基组单，双，和三微扰激发受限耦合群集方法来计算。观察到一个最小值位于氢原子侧（θ = 0; R = 8.25 bohr）。研究了13个第一精细旋转能级的非弹性横截面，其总能量高达100 cm ^-1。朝向奇数Δ倾向规则Ñ和Δ Ñ =Δ Ĵ中找到。