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https://loreandordure.com/2024/03/19/20…

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Collisional excitation of propyne (CH$_3$CCH) by He atoms
M. Ben Khalifa, B. Darna, J. Loreau
https://arxiv.org/abs/2402.17491 https://

Collisional excitation of propyne (CH$_3$CCH) by He atoms
A detailed interpretation of the detected emission lines of environments in which propyne (or methyl acetylene, CH$_3$CCH) is observed requires a knowledge of its collisional rate coefficients with the most abundant species in the interstellar medium, He or H$_2$. We present the first three-dimensional potential energy surface (3D-PES) for the CH$_3$CCH-He molecular complex, study the dynamics of the collision, and report the first set of rate coefficients for temperatures up to 100 K for the c…