Low-energy ions interacting with anthracene molecules and clusters

详细信息	查看全文 | 推荐本文 |

• 作者：P. Rousseau^a ; ^b ; ^c ; ^d ; ^{prousseau@ganil.fr} ; A. Ł ; awicki^a ; ^b ; ^c ; ^d ; A.I.S. Holm^e ; M. Capron^a ; ^b ; ^c ; ^d ; R. Maisonny^a ; ^b ; ^c ; ^d ; S. Maclot^a ; ^b ; ^c ; ^d ; E. Lattouf^a ; ^b ; ^c ; ^d ; H.A.B. Johansson^e ; F. Seitz^e ; A. M&#233 ; ry^a ; ^b ; ^c ; ^d ; J. Rangama^a ; ^b ; ^c ; ^d ; H. Zettergren^e ; S. Ros&#233 ; n^e ; H.T. Schmidt^e ; J.-Y. Chesnel^a ; ^b ; ^c ; ^d ; A. Domaracka^a ; ^b ; ^c ; ^d ; B. Manil^f ; L. Adoui^a ; ^b ; ^c ; ^d ; H. Cederquist^e ; B.A. Huber^a ; ^b ; ^c ; ^d
• 关键词：PAH ; Clusters ; Ion collisions ; Ionization ; Fragmentation
• 刊名：Nuclear Instruments and Methods in Physics Research Section B ; Beam Interactions with Materials and Atoms
• 出版年：2012
• 期刊代码：42_0168583x
• 类别：ph
• 出版时间：15 May, 2012
• 卷：279
• 期：Complete
• 页码：140-143
• 文件大小：547 K

摘要

The interaction of slow ions with a small polycyclic aromatic hydrocarbon, namely anthracene (Cb>14b>Hb>10b>), is studied in the gas-phase either with the isolated molecule or with a pure cluster target. We discuss the ionization and fragmentation of the molecule with respect to the projectile charge state, i.e. for singly charged He⁺ ions and for multiply charged Xe²⁰⁺ ions. For the isolated Cb>14b>Hb>10b>, single or multiple ionization of the molecule occurs under ion impact. The (multi) cation relative yields are compared with those obtained by other ionization methods (electron and fs-laser). The molecular dissociation occurs by loss of hydrogen and small hydrocarbon molecules, leading to the formation of Cb>nb>Hb>xb> cations. The interaction of Xe²⁰⁺ with Cb>14b>Hb>10b> clusters gives surprising results, i.e. the emission of hotter monomer compared to the interaction with He⁺.