A new detection method in studying penetration depth of low-energy heavy ions in botanic samples

LIU Feng，

WANG Yu-Gang，

XUE Jian-Ming，

WANG Si-Xue，

ZHAO Wei-Jiang

Nuclear Science and Techniques

Vol.12, No.3

pp.169-176

Published in print 01 Aug 2001

CLC：O571.33, TN305

20300

A new detection method has been applied to study the penetration depth of low-energy heavy ions in botanic samples. Highly oriented pyrolytic graphite (HOPG) pieces were placed behind the target samples with certain thickness to receive energetic penetrated ions during the irradiation. After irradiation, statistic number density of protrusion-like damage induced by energetic penetrated ions can be obtained through scanning tunneling microscope (STM) observation on the surfaces of HOPG. The results of test indicate that the detection limit can be as low as 1.0×10⁹ protrusions/cm². With the method, the penetration depth of at least 60µm can be detected in kidney bean slices irradiated by N⁺ ions with dose of 0.3-3×10¹⁷ions/cm².

Low energy ion irradiationTransmissionBotanic sliceSTM observationHOPG (piece)

References

Yu Z L, Deng J G, He J J et al. Nucl Instr Meth, 1991, 59-60B: 705〜713

Linhard J, Scharff M, Schiφtt H E et al. Mat Fys Medd, 1963, 33: 14

Wei Z, Liu Y, Wang G et al. Radiat Res, 1995, 141: 342〜344

Zhu G H, Zhou H Y, Wang X F et al. Nucl Tech (in Chinese), 2001, 24(6): 456~460

Su Y, Li Y.

J Tianjin Normal Univ, 1996. 16(4): 32〜35

Wang X F, Zhou Y N, Zhou H Y et al. Nucl Sci Tech (China), 2001, 12(1): 26〜31

Xue J M, Wang Y G, Liu F et al. Surf Coat Technol, 2000, 128: 139~143

Cortatger R, Claverie A, Chahboun A.

Surf Sci, 1992, 262: 208~218

Wang Y G, Kang Y X, Zhao W J et al. J Appl Phys, 1998, 83(3): 1341~1345

Shedd G M, Russell P E.

J Vac Sci Technol, 1991, A(3): 1261

Zeigler J F, Biersack J P, Littmark U.

Stopping and ranges of ions in matter. New York: Pergamon Press, 1985

Wayne Rabalais J.

Low energy ion-surface interaction. England: John Wiley & Sons Ltd. 1994