本实验利用TDPAC方法,通过30MeVα粒子束(2μA)引起的~(109)Ag(α,2n)~(111)In核反应产生的~(111)In离子,研究了~(111)In离子在Ag中反冲引起的重离子辐射损伤. 实验结果表明在α粒子剂量率4.2×10~(12)cm~(-2)s~(-1)情况下,即使在室温环境中,仍引起明显的重离子辐射损伤.这些损伤破坏了Ag立方晶体结构的对称性而产生一个高达10~(18)V/cm~2的电场梯度作用于~(111)Cd探针核.并说明其是双空位或空位环俘获~(111)Cd的结果.实验还进行了激光退火效应的研究,指出其与真空热退火相比的优越性.
The radiation damage was studied on ~(111)In nuclei recoil implanted inAg following ~(109)Ag(α,2n)~(111)In reaction by TDPAC method. The Ag foils(20μm) wereirradiated with 30MeV α particles under room temperature, the particle dose ratebeing 4.2×10~(12)cm~(-2)s~(-1). The experimental results indicated that the radiation damagewas severe in Ag even at room temperature. An electric field gradient of 10~(18) V/cm~2which is due to the radiation damage has been put onto the ~(111)Cd probe. The cubic Ag lattice was destroyed and lots of vacancies and interstitials cre-ated in Ag by radiation. The divacancy trapping has been suggested and the laserannealing has been conducted.
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