Cooling of PAH cations studied with an electrostatic storage ring

被引：14

作者：

Bernard, Jerome ^{[1
]}

Chen, Li ^{[1
]}

Bredy, Richard ^{[1
]}

Ji, Mingchao ^{[1
]}

Ortega, Celine ^{[1
]}

Matsumoto, Jun ^{[2
]}

Martin, Serge ^{[1
]}

机构：

[1] Univ Lyon 1, CNRS, Inst Lumiere Matiere, UMR5306, F-69622 Villeurbanne, France

[2] Tokyo Metropolitan Univ, Dept Chem, Hachioji, Tokyo 1920397, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2017年 / 408卷

关键词：

Radiative cooling; Polycycling aromatic hydrocarons; Electronic fulorescence; Electrostatic ion storage ring; FLUORESCENCE;

D O I：

10.1016/j.nimb.2017.03.142

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper we discuss the production of molecular PAH cations using an ECR ion source and their subsequent cooling studied with an electrostatic storage ring, the Mini-Ring on a time range up to 10 ms. We show that the ECR ion source can produce high currents of small PAH cation, here naphthalene and anthracene cations. Then, we report experimental result for the cooling of three PAH cations (anthracene, naphthalene and pyrene) stored in our compact electrostatic storage ring (the Mini-Ring). We show that the Poincare recurrent fluorescence plays a major role in the cooling process of those PAH cations. We show that for a given internal energy, the cooling rate is much smaller for pyrene than for anthracene and naphthalene. We conclude that the Poincare recurrent fluorescence is less efficient due to smaller oscillator strength of the D-2-D-0 electronic transition for pyrene. (C) 2017 Published by Elsevier B.V.

引用

页码：21 / 26

页数：6

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