Residual activity induced by ion bombardment on insulating samples

In this work we investigate some properties of the residual activity induced by protons impinging on quartz, mylar and other insulating materials. In particular, we discuss the time constant related to the decay of the emitted radiation after the primary ion beam is turned off. This radiation includ...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2005-10, Vol.240 (1-2), p.297-302
Main Authors: Shubeita, S.M., dos Santos, C.E.I., Filho, J.L.R., Giulian, R., Meira, L., Silva, P.R., Amaral, L., Dias, J.F., Yoneama, M.L.
Format: Article
Language:English
Subjects:
Bremsstrahlung
Secondary electron emission
X-ray emission spectra
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Summary:In this work we investigate some properties of the residual activity induced by protons impinging on quartz, mylar and other insulating materials. In particular, we discuss the time constant related to the decay of the emitted radiation after the primary ion beam is turned off. This radiation includes a continuum of bremsstrahlung and, in some cases, characteristic X-rays induced in the process as well. In general, the results indicate the presence of two time constants in the decaying process. Moreover, it appears that the residual activity has a strong dependence on the material specifications and on the conditions of the surface under bombardment. A simple mechanism for this process is suggested.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2005.06.133