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论文类型：期刊论文

发表时间：2013-06-01

发表刊物：CHINESE PHYSICS B

收录刊物：SCIE、EI、ISTIC、Scopus

卷号：22

期号：6

ISSN号：1674-1056

关键字：quasiclassical trajectory method; potential energy surface; product polarization; isotope effect

摘要：A new London-Eyring-Polanyi-Sato potential energy surface is employed in this work to study the stereo properties of the O(P-3) + CH4 -> H + CH3O reaction in its rovibrationally ground state using the quasiclassical trajectory method (QCT). Our calculations are performed at a range of collision energies, E-c = 1.5 eV similar to 3.5 eV, and the excitation function obtained by the QCT method accords well with the experimental data. The product rotational polarization is calculated, and the product shows a strong rotational polarization in the centre-of-mass coordinate system. The orientation of the product rotational angular momenta is sensitive to the increase in collision energy, and the alignment of the product rotational angular momenta shows some of the properties of the heavy heavy-light mass combination reactions. In the isotopic substituted reaction study, when the H atoms in methane are replaced by D atoms, the rotational polarization is obviously reduced. The polarization-dependent differential cross section is also studied by this QCT calculation to provide detailed information about the rotational alignment and orientation of the product.