A HIGH-RESISTIVITY PHASE INDUCED BY SWIFT HEAVY-ION IRRADIATION OF BI - A PROBE FOR THERMAL SPIKE DAMAGE

被引:162
作者
DUFOUR, C
AUDOUARD, A
BEUNEU, F
DURAL, J
GIRARD, JP
HAIRIE, A
LEVALOIS, M
PAUMIER, E
TOULEMONDE, M
机构
[1] ECOLE POLYTECH,LSI,F-91128 PALAISEAU,FRANCE
[2] ISMRA UNIV,LERMAT,CNRS,URA 1317,F-14050 CAEN,FRANCE
[3] COMPLEXE SCI RANGUEIL,PHYS SOLIDES LAB,F-31077 TOULOUSE,FRANCE
[4] COMPLEXE SCI RANGUEIL,SERV NATL CHAMPS MAGNET PULSE,F-31077 TOULOUSE,FRANCE
关键词
D O I
10.1088/0953-8984/5/26/027
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Pure bismuth samples were irradiated at 20 K with swift heavy ions from O-18 to U-238 in the GeV range. The rate of the induced damage was deduced from in situ electrical resistance measurements. Above a threshold in the electronic stopping power S(e) equal to 24 keV nm-1, the damage is due to electronic slowing down. Above 30 keV nm-1, the electronic slowing down is efficient enough to induce latent tracks attributed to the appearance of a high-resistivity phase. The induced latent tracks radii can be up to 21.9 nm for S(e) = 51 keV nm-1 which is the largest value reponed so far for non-radiolytic materials. The evolution with S(e) of the latent tracks radii is calculated on the basis of the thermal spike model, assuming a malistic value for the electron-phonon coupling constant. A rather good agreement is obtained which supports the idea that the thermal spike could be operative in the observed radiation damage.
引用
收藏
页码:4573 / 4584
页数:12
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