Abstract

This is a corrigendum to Denis-Alpizar & Stoecklin (2020). Owing to an interface error in the implementation of the potential energy surface in the Newmat dynamics code, the cross sections and rate coefficients presented in Figs. 3, 4, and 5 and discussed in Sect. 3.2 of Denis-Alpizar & Stoecklin (2020), regarding the dynamics, appear to be significantly wrong and are replaced by the new Figs. 1, 2, and 3, respectively. The new cross sections and rate coefficients are of the same order of magnitude as the previous ones, but the sorting and the structures of the curves associated with different transitions are hardly comparable to the previous ones. As is detailed below, the main conclusions of our original manuscript remain, however, unchanged. The (Kc = 0) propensity rule mentioned in our original manuscript, which results from the fact that H2S is a near oblate symmetric top, remains visible in Figs. 1 and 2 and it still becomes increasingly rigorous as j and the collision energy both increase. The transitions towards the levels the closest in energy to the initial one and associated with the lowest (j = 0 or 1) also give the largest cross sections, as noted previously. Conversely, the conservation of the parity index is not observable anymore for the lowest values of j, but it still appears to give the largest cross sections as j and the collision energy both increase. The comparison of our new results with the only experimental data available for this system appear to be quite a bit more satifactory than before. Indeed, our calculated value for the depopulation rate coefficient rate of the 110 level of H2S at 11.1K is now about 1.75 times larger (3:06 10-11 cm3 molecule-1 s-1) than the one reported by Ball et al. (1999) (1:75 10-11 cm3 molecule-1 s-1), while our previous value was three times larger than the one from their experiment. It is also interesting to see that the value (4:0 10-11 cm3 molecule-1 s-1) which can be obtained from the results of Dagdigian (2020) for the collision of H2S with H2 (5:6 10-11 cm3 molecule-1 s-1) by using the mass scaling (Formula present) is also in fair agreement with our results. If we now revisit in Fig. 3 the comparison we made previously between the H2S + He and H2O + He collisional systems, the temperature dependences are now seen to be similar for these two systems while they used to differ in our previous (Figure present) calculations. This result can be understood by reminding readers that the well depths of the two associated potential energy surfaces (PESs) are very close, while the ratio of the reduced masses of the two systems nearly equals one. Conversely, the magnitudes and the propensity rules are still quite different for some of the transitions as a result of both the differences in the angular anisotropies of the two PESs and in the rotational constants, H2S being a nearly oblate symmetric top while H2O is a good example of an asymmetric top intermediate case. The important conclusion of ou