000221299 001__ 221299
000221299 005__ 20181203024336.0
000221299 0247_ $$2doi$$a10.1002/cphc.201600608
000221299 022__ $$a1439-4235
000221299 02470 $$2ISI$$a000388625000024
000221299 037__ $$aARTICLE
000221299 245__ $$aExperimental and Theoretical Studies of Low-Energy Penning Ionization of NH3, CH3F, and CHF3
000221299 260__ $$bWiley-Blackwell$$c2016$$aWeinheim
000221299 269__ $$a2016
000221299 300__ $$a7
000221299 336__ $$aJournal Articles
000221299 520__ $$aWe present results from a joint theoretical and experimental study of the low-energy Penning ionization of NH3, CH3F, and CHF3 by metastable Ne(P-3(2)) and He(S-3(1)) atoms. We combine the merged neutral beams experiment, covering a range of collision energies between 0.1-150K, with multichannel quantum defect theory calculations based on interaction potentials from symmetry-adapted perturbation theory. The three symmetric tops provide several distinct properties that make them interesting targets for cold chemistry studies. Of these three, only NH3 has a lone electron pair that leads to a strong binding with rare gas atoms. The CHF3 molecule has much smaller rotational constants than both NH3 and CH3F, and thus has a considerably higher density of rotational states already at low energies. Their presence opens inelastic collision channels that reduce the observed reactive cross section. We show that this effect dominates the total rate coefficient in heavy molecules already at relatively low collision energies but is much less prominent for lighter molecules
000221299 6531_ $$aCold Chemistry
000221299 6531_ $$aCold Molecules
000221299 6531_ $$aInelastic scattering
000221299 6531_ $$aPenning Ionisation
000221299 700__ $$aJachymski, Krzysztof
000221299 700__ $$aHapka, Michał
000221299 700__ $$0247482$$g239915$$aJankunas, Justin
000221299 700__ $$0243488$$g116115$$aOsterwalder, Andreas
000221299 773__ $$j17$$tChemPhysChem$$q3776
000221299 909C0 $$xU12027$$0252210$$pGR-OST
000221299 909CO $$pSB$$particle$$ooai:infoscience.tind.io:221299
000221299 917Z8 $$x116115
000221299 917Z8 $$x116115
000221299 937__ $$aEPFL-ARTICLE-221299
000221299 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000221299 980__ $$aARTICLE