中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Quantum interference effect in collision-induced intramolecular energy transfer within singlet-triplet mixed states
作者: Sha, GH;  Zhang, CH
关键词: singlet-triplet mixed state ;  collisional energy transfer ;  quantum interference ;  double resonance multiphoton ionization
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2004-08-01
DOI: 10.3866/PKU.WHXB200408zk18
卷: 20, 页:1010-1016
收录类别: SCI
文章类型: Review
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The principle of wave-particle duality of quantum mechanics ascertains that any microscopic particle must also exhibit wave properties. The matter wave, or de Broglie wave, was first evidenced by Davisson and Germer in 1927 in the electron diffraction by crystals. In recent years, numerous fascinating examples of the quantum interference effect (QIE) have been discovered in the molecular systems in their excitation, dissociation and ionization by photons as well as in collision processes. Our group was the first to obtain the experimental evidence of QIE in a collision, specifically for the singlet-triplet mixed state of a diatomic species, and to derive an explicit expression for its energy transfer cross-section. In this expression, the interference phase angle (thetast) that describes the phase angle difference between singlet and triplet energy transfer channels is defined and experimentally measured for CO(A (1)Pi, v = 0/ e (3)Sigma(-), v = 1)-M collision system with M = rare gases (He, Ne, Ar), homonuclear diatomics (H-2, N-2, O-2) and heteronuclear diatomics (HCl) via the optical-optical double resonance multiphoton ionization (OODR-MPI) technique. We have also observed QIE in Na-2( A (1)Sigma(u)(+), v = 8 / b(3) Pi(0u), v = 14)-Na collision. More recently, we have carried out quantum scattering calculations of the interference angle based on the first order Born approximation of time dependent perturbation theory. For atom-diatom collision, the anisotropic Lennard-Jones interaction potential was adopted, and for polar diatom-diatom collision, the long-range dipole-dipole interaction proportional to R-3 was shown to be a proper potential for the calculation. All the calculated theta(ST) at T = 77, 253 and 470 K for CO(A Pi(1), v = 0/ e (3)Sigma(-), v = 1)-M, for M = He(theta(ST) = 58degrees similar to 65degrees), Ne (66degrees similar to 69degrees), Ar (72degrees similar to 90degrees) and HCl (101degrees similar to 110degrees), are in good agreement with the experiments. Our calculated differential theta(ST) are in the range of 48degrees similar to 70degrees for CO-He and 93degrees similar to 112degrees for CO-HCl collision for all v and b values that are physically significant. These values are close to those experimental theta(ST)'s obtained in the gas cell, implying that the "average effect" is not serious. The calculation also gives an effective collision time of 0.3 ps for CO - He and 1.5 ps for CO - HCl collision, which explains why the experimental theta(ST) for the former is much smaller than that of the latter. These results show that theta(ST) should provide important information on the singlet-triplet mixed state intermolecular potential, which is difficult to obtain by other experimental or theoretical methods.
关键词[WOS]: MULTIPHOTON IONIZATION SPECTROSCOPY ;  ATOM-DIATOM SYSTEM ;  CO E ;  BEHAVIOR ;  PATHWAYS ;  NA-2
语种: 英语
WOS记录号: WOS:000223283100018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139325
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Sha, GH,Zhang, CH. Quantum interference effect in collision-induced intramolecular energy transfer within singlet-triplet mixed states[J]. ACTA PHYSICO-CHIMICA SINICA,2004,20:1010-1016.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Sha, GH]'s Articles
 [Zhang, CH]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Sha, GH]‘s Articles
 [Zhang, CH]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace