Direct observation of Young's double-slit interferences in vibrationally resolved photoionization of diatomic molecules

被引：106

作者：

Canton, Sophie E. ^{[2
]}

Plesiat, Etienne ^{[1
]}

Bozek, John D. ^{[3
]}

Rude, Bruce S. ^{[4
]}

Decleva, Piero ^{[5
,6
]}

Martin, Fernando ^{[1
,7
]}

机构：

[1] Univ Autonoma Madrid, Dept Quim, E-28049 Madrid, Spain

[2] Lund Univ, Max Lab, S-22100 Lund, Sweden

[3] SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy

[6] CNR, Ist Officina Mat, I-34127 Trieste, Italy

[7] IMDEA Nanociencia, Madrid 28049, Spain

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2011年 / 108卷 / 18期

关键词：

photoelectron spectroscopy; molecular spectroscopy; molecular ionization; density functional theory; quantum chemistry; 2-CENTER INTERFERENCE; H-2; N-2; LOCALIZATION; DISSOCIATION; DIFFRACTION; SYMMETRY;

D O I：

10.1073/pnas.1018534108

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Vibrationally resolved valence-shell photoionization spectra of H(2), N(2) and CO have been measured in the photon energy range 20-300 eV using third-generation synchrotron radiation. Young's double-slit interferences lead to oscillations in the corresponding vibrational ratios, showing that the molecules behave as two-center electron-wave emitters and that the associated interferences leave their trace in the angle-integrated photoionization cross section. In contrast to previous work, the oscillations are directly observable in the experiment, thereby removing any possible ambiguity related to the introduction of external parameters or fitting functions. A straightforward extension of an original idea proposed by Cohen and Fano [Cohen HD, Fano U (1966) Phys Rev 150: 30] confirms this interpretation and shows that it is also valid for diatomic heteronuclear molecules. Results of accurate theoretical calculations are in excellent agreement with the experimental findings.

引用

页码：7302 / 7306

页数：5

共 47 条

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