The velocity dependence of fast heavy-ion induced desorption of biomolecules
作者:
P. Håkansson,
B. Sundqvist,
期刊:
Radiation Effects
(Taylor Available online 1982)
卷期:
Volume 61,
issue 3-4
页码: 179-193
ISSN:0033-7579
年代: 1982
DOI:10.1080/00337578208229931
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Heavy-ion beams from the Uppsala EN-tandem have been used to induce desorption of ions from samples of glycylglycine, ergosterol and cesium iodide. The experimental technique, involving time-of-flight mass spectroscopy, and the apparatus are described. Secondary ion yields of (M + H)+, M+and Cs+, where M denotes the molecule, have been measured as a function of the atomic number and velocity of the fast primary ions. The results show that the desorption process is connected to the electronic part of the energy loss of the primary ion. A thermal spike model earlier presented to describe sputtering yields from uranium tetrafiuoride1induced by MeV fluorine beams is shown to reproduce some general features of the measured yield distributions.
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