103 positron lifetime spa corsist of As-grown Cz Si exponential decay components Plastically ceformed Si positron trapping in open-volume defects leads to long-lived components longer lifetime due to lower electron density 2=320p3 analysis by non-linear fitting:lifetimes r;and (divacancies) intensities Ii 10 positron lifetime spectrum. N()- 73=520cs =2180s (vacancy clusters) trapping coefficient (bulk) K=uCa 411 2 3 Time [ns] trapping rate defect concentration
250 e Aluminum Trapping Model 200 聚乙烯的热弛豫过程 150 200 400 3.0 Temperature() 2.5 铝的热平衡缺陷 su/ 2.0- 15 1.0 0.5 0.0 120 160 200 240 2032 360 Temperture(k)
Positron interactions with condensed matter Backscattered Ps Secondary (-140ns) reemission electrons o-Ps defect trapping ang lao o-Ps defect trapping p-Ps (0.125ns)annihilation or e*free Annihilation (0.5 ns)
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介孔结构和尺寸 a b 理想化的结构 (a)cylindrical pores;(b)voids between packed spheres and schematic boundary structure showing. LNSP closed (latent)pores;(d)ink bottle;(e)funnel;and (f)open pores
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10 10s 6ns syuno) 109 49ns 10 地wM件 1403 102 200 400 600 800 1000 Channel A typical PALS spectrum with three film Ps lifetimes fitted using POSFIT
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