激光增强和抑制冷反应理论：费米子 - 玻色子6Li + 7Li2 <-->(普朗克常量除以2πω0的变体) 6Li7Li + 7Li辐射碰撞

Theory of laser enhancement and suppression of cold reactions: the fermion-boson 6Li+7Li2<-->(variant Planck's over 2pi omega0) 6Li7Li+7Li radiative collision.

作者信息

Li Xuan, Parker Gregory A, Brumer Paul, Thanopulos Ioannis, Shapiro Moshe

机构信息

Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Oklahoma 73019, USA.

出版信息

J Chem Phys. 2008 Mar 28;128(12):124314. doi: 10.1063/1.2899666.

DOI:10.1063/1.2899666

PMID:18376926

Abstract

We present a nonperturbative time-dependent quantum mechanical theory of the laser catalysis and control of a bifurcating A+BC<-->(variant Planck's over 2pi omega(0))ABC*(v)<-->(variant Planck's over 2pi omega(0) )AB+C reaction, with ABC*(v) denoting an intermediate, electronically excited, complex of ABC in the vth vibrational state. We apply this theory to the low collision energy fermion-boson light-induced exchange reaction, (6)Li((2)S)+(7)Li(2)((3)Sigma(u)(+))<-->(variant Planck's over 2pi omega(0))((6)Li(7)Li(7)Li)*<-->(variant Planck's over 2pi omega(0))(6)Li(7)Li((3)Sigma(+))+(7)Li((2)S). We show that at very low collision energies and energetically narrow (approximately 0.01 cm(-1)) initial reactant wave packets, it is possible to tune the yield of the exchange reaction from 0 to near-unity (yield >or=99%) values. Controllability is somewhat reduced at collisions involving energetically wider (approximately 1 cm(-1)) initial reactant wave packets. At these energetic bandwidths, the radiative reactive control, although still impressive, is limited to the 0%-76% reactive-probabilities range.

摘要

我们提出了一种非微扰的含时量子力学理论，用于研究激光催化和控制分支反应A + BC ⇌ （普朗克常量除以2πω₀）ABC*（v）⇌ （普朗克常量除以2πω₀）AB + C，其中ABC*（v）表示处于第v个振动态的ABC的电子激发中间复合物。我们将该理论应用于低碰撞能费米子 - 玻色子光诱导交换反应，即（⁶Li（²S）） + （⁷Li₂（³Σᵤ⁺））⇌ （普朗克常量除以2πω₀）（⁶Li⁷Li⁷Li）*⇌ （普朗克常量除以2πω₀）⁶Li⁷Li（³Σ⁺） + （⁷Li（²S））。我们表明，在非常低的碰撞能和能量上很窄（约0.01 cm⁻¹）的初始反应物波包情况下，有可能将交换反应的产率从0调节到接近100%（产率≥99%）的值。在涉及能量上更宽（约1 cm⁻¹）的初始反应物波包的碰撞中，可控性会有所降低。在这些能量带宽下，辐射反应控制虽然仍然令人印象深刻，但仅限于0% - 76%的反应概率范围。