Fragmentation of α- and β-alanine molecules by ions at Bragg-peak energies

被引：41

作者：

Bari, S. ^{[1
]}

Sobocinski, P. ^{[1
]}

Postma, J. ^{[1
]}

Alvarado, F. ^{[1
]}

Hoekstra, R. ^{[1
]}

Bernigaud, V. ^{[2
]}

Manil, B. ^{[2
]}

Rangama, J. ^{[2
]}

Huber, B. ^{[2
]}

Schlathoelter, T. ^{[1
]}

机构：

[1] Univ Groningen, KVI Atom Phys, NL-9747 AA Groningen, Netherlands

[2] UCBN, ENSICAEN, CNRS, CEA,CIRIL, F-14070 Caen 05, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 128卷 / 07期

关键词：

D O I：

10.1063/1.2830032

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：

The interaction of keV He+, He2+, and O5+ ions with isolated alpha and beta isomers of the amino acid alanine was studied by means of high resolution coincidence time-of-flight mass spectrometry. We observed a strong isomer dependence of characteristic fragmentation channels which manifests in strongly altered branching ratios. Despite the ultrashort initial perturbation by the incoming ion, evidence for molecular rearrangement leading to the formation of H-3(+) was found. The measured kinetic energies of ionic alanine fragments can be sufficient to induce secondary damage to DNA in a biological environment. (C) 2008 American Institute of Physics.

引用

页数：6

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