| Original Articles |
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Deep Penetration of Charged Particles in Biological Samples |
| WANG Rui-Jin1;XIA Yue-Yuan2;MU Yu-Guang1;ZHAO Ming-Wen1;MA Yu-Chen1;LIU Xiang-Dong2;ZHANG Jian-Hua2 LIU Ji-Tian2;YU Zeng-Liang3 |
| 1Department of Optoelectronics and Information Engineering, Shandong University, Ji’nan 250100
2Department of Physics, Shandong University, Ji’nan 250100
3Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
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| Cite this article: |
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WANG Rui-Jin, XIA Yue-Yuan, MU Yu-Guang et al 2001 Chin. Phys. Lett. 18 208-210 |
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Abstract Experimental evidence of abnormally deep penetration in some botanical targets by low-energy ion beams is presented. The energy spectra of 818 keV He+ ions penetrating a 70μm thick seed coat of maize, fruit peel of grape and of tomato all have a common feature. The leading edges of these broad spectra indicate that some of the penetrating ions pass through the thick targets easily and only lose a small fraction of their initial incident energy. Rutherford backscattering spectrometry and electron microprobe measurements are used to determine the argon concentration in multilayer samples of the seed coat of maize implanted by 200 keV Ar+ ions. The results show that about 10% of the Ar+ ions can penetrate deeper than ~ 100μm in these samples.
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34.50.Bw
87.50.-a
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Published: 01 February 2001
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| PACS: |
34.50.Bw
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(Energy loss and stopping power)
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87.50.-a
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(Effects of electromagnetic and acoustic fields on biological systems)
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