Evaluation of influence of surface barrier in solid on ion reflection by bipartition model of ion transport

NUCLEAR, HEAVY ION AND ATOMIC PHYSICS

Evaluation of influence of surface barrier in solid on ion reflection by bipartition model of ion transport

YANG Dai-Lun，

WU Zhang-Wen

Nuclear Science and Techniques

Vol.15, No.2

pp.89-94

Published in print 01 Apr 2004

CLC：TL99

39800

The influence of surface barrier of solid upon ion reflection was studied in a few papers of other authors by using the Monte-Carlo simulation. Based on the bipartition model of ion transport, a new analytical theory has been developed instead of the MC simulation, due to important implication of the effect for fusion research. In the present paper we have calculated the number reflection coefficients of H⁺, D⁺, He and T⁺ normally incident on C, Al and Cu for ion energy from several eV to one hundred keV respectively. Our computational results accorded with the MC simulation. The results have shown that the effect of surface barrier on ion reflection becomes evident when the energy of incident ions is lower than one keV. In particular, for the ion energy from several eV to one hundred eV, the discrepancies of number reflection coefficients can increase up to 0.1~0.3, showing this influence to be very important.

Ion reflectionNumber reflection coefficientSurface barrier

References

[1]

Jackson D P. Radiat Eff, 1980, 49: 233

[2]

Eckstein W, Biersack J P. Appl Phys, 1985, A38: 123

[3]

Bottiger J et al. Radiat Eff, 1971, 11: 69

[4]

Littmark U, Gras-Marti A. Appl Phys, 1978, 16: 247

[5]

Urbassek H M, Vicanek M. to be published in Appl Phys A

[6]

Luo Z M. Phys Rev, 1985, B32: 812

[7]

Luo Z M. Phys Rev, 1985, B32: 824

[8]

Luo Z M, Wang S M. Phys Rev, 1987, B36: 1885

[9]

Luo Z M, Hou Q, Teng L J. Nucl Instr Meth Phys Res, 1996, B115: 497-500

[10]

Luo Z M, Hou Q, Teng L J. Nucl Instr Meth Phys Res, 1998, B135: 149-153

[11]

Oen O S, Robinson M T. Nucl Instr Meth, 1976, 132: 647

[12]

Eckstein W, Verbeck H.

Data on light ion reflection, Max-Planck Institut für plasmaphysik report, IPPQ/32, Garching, FRG

, 1979

Baidu Scholar

Google Scholar

[13]

Overbury S H et al. J Nucl Mater, 1980, 93-94: 529

[14]

Thomas E W, Janev R K, Smith J J. Particle reflection from surface―A recommended data base, INDC(NDS)-249, 1991