Color center creation in LiF crystals irradiated with 5-and 10-MeV Au ions

被引：30

作者：

Schwartz, K. ^{[1
]}

Sorokin, M. V. ^{[2
]}

Lushchik, A. ^{[3
]}

Lushchik, Ch. ^{[3
]}

Vasilchenko, E. ^{[3
]}

Papaleo, R. M. ^{[4
]}

de Souza, D. ^{[4
]}

Volkov, A. E. ^{[2
]}

Voss, K-O. ^{[1
]}

Neumann, R. ^{[1
]}

Trautmann, C. ^{[1
]}

机构：

[1] GSI Darmstadt, MF, D-64291 Darmstadt, Germany

[2] Kurchatov Inst, Russian Res Ctr, Moscow, Russia

[3] Univ Tartu, Inst Phys, Tartu, Estonia

[4] Pontificia Univ Catolica Rio Grande do Sul, Fac Phys, Porto Alegre, RS, Brazil

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2008年 / 266卷 / 12-13期

基金：

俄罗斯基础研究基金会;

关键词：

ionic crystals; radiation damage; color centers; ion tracks; 5; electrons; electronic excitations of the lattice;

D O I：

10.1016/j.nimb.2008.03.107

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The peculiarities of defect creation in LiF crystals by irradiation with 5- and 10-MeV Au ions have been studied using optical spectroscopy. The crystals were irradiated at room temperature with fluences from 1 x 10(12) to 2 x 10(14) ions/cm(2) at various beam current densities (1-200 nA/cm(2)). The short ion range in LiF allowed measurements for higher absorbed energy densities and high defect volume concentration. The efficiency of single F center and F. and larger aggregate creation depends drastically both on ion fluence and flux (beam current). Color center creation is less effective for 5-MeV Au ions than for 10-MeV Au ions, which produce 8 electrons with energies sufficient for creation of cation excitons (similar to 62 eV). The peculiarities of color center accumulation in LiF crystals under MeV An ion irradiation are considered taking into account the nonlinear kinetics of interstitials (H centers). (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：2736 / 2740

页数：5

共 18 条

[1] RADIATION INTENSITY DEPENDENCE OF FIRST STAGE-F COLOURING IN NACL [J].