Quantum interference scattering of aligned molecules:: Bonding in O4 and role of spin coupling

被引：102

作者：

Aquilanti, V ^{[1
]}

Ascenzi, D

Bartolomei, M

Cappelletti, D

Cavalli, S

Vítores, MD

Pirani, F

机构：

[1] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy

[2] Univ Perugia, Ist Tecnol Chim, I-06125 Perugia, Italy

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.82.69

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular beam experiments on collisions between oxygen molecules were performed at low energy and high angular resolution to permit observation of the "glory" interference effect. A novel technique for aligning the rotational angular momentum of the colliding molecules is exploited. Analysis of total scattering cross section data yields for the O-2-O-2 bond an energy of 1.65 +/- 0.08 kJ.mol(-1) for the most stable configuration (parallel molecules) at a distance of 0.356 +/- 0.007 nm. These results indicate that most of the bonding in the dimer comes from electrostatic (van der Weals) farces but chemical (spin-spin) contributions are not negligible. [S0031-9007(98)08079-X].

引用

页码：69 / 72

页数：4

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