Electron transfer mediated decay of alkali dimers attached to He nanodroplets

被引：16

作者：

Ben Ltaief, L. ^{[1
]}

Shcherbinin, M. ^{[1
]}

Mandel, S. ^{[2
]}

Krishnan, S. ^{[3
]}

Richter, R. ^{[4
]}

Pfeifer, T. ^{[5
]}

Bauer, M. ^{[6
]}

Ghosh, A. ^{[6
]}

Mudrich, M. ^{[1
,3
]}

Gokhberg, K. ^{[6
]}

LaForge, A. C. ^{[7
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Indian Inst Sci Educ & Res, Pune 411008, Maharashtra, India

[3] Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India

[4] Elettra Sincrotrone Trieste, I-3414 Trieste, Italy

[5] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[6] Heidelberg Univ, Phys Chem Inst, D-69117 Heidelberg, Germany

[7] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2020年 / 22卷 / 16期

基金：

欧洲研究理事会;

关键词：

HELIUM NANODROPLETS; CHARGE-TRANSFER; PENNING IONIZATION; ENERGY-TRANSFER; ATOMS; IONS; FRAGMENTATION; MOLECULES; DROPLETS;

D O I：

10.1039/d0cp00256a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Alkali metal dimers attached to the surface of helium nanodroplets are found to be efficiently doubly ionized by electron transfer mediated decay (ETMD) when photoionizing the helium droplets. This process is evidenced by detecting in coincidence two energetic ions created by Coulomb explosion and one low-kinetic energy electron. The kinetic energy spectra of ions and electrons are reproduced by simple model calculations based on diatomic potential energy curves, and are in agreement with ab initio calculations for the He-Na-2 and He-KRb systems. This work demonstrates that ETMD is an important decay channel in heterogeneous nanosystems exposed to ionizing radiation.

引用

页码：8557 / 8564

页数：8

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