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The ortho-to-para ratio of H<sub>2</sub>Cl<sup>+</sup>: Quasi-classical trajectory calculations and new simulations in light of new observations
Multi-hydrogenated species with proper symmetry properties can present different spin configurations, and thus exist under different spin symmetry forms, labeled as para and ortho for two-hydrogen molecules. We investigated here the ortho-to-para ratio (OPR) of H$_2$Cl$^+$ in the light of new observations performed in the z=0.89 absorber toward the lensed …