文章基本信息

标题：High e+/e− Ratio Dense Pair Creation with 10²¹W.cm⁻² Laser Irradiating Solid Targets
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作者：E. Liang ; T. Clarke ; A. Henderson 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep13968
出版社：Springer Nature
摘要：We report results of new pair creation experiments using ~100 Joule pulses of the Texas Petawatt Laser to irradiate solid gold and platinum targets, with intensities up to ~1.9 × 10²¹ W.cm⁻² and pulse durations as short as ~130 fs. Positron to electron (e+/e−) ratios >15% were observed for many thick disk and rod targets, with the highest e+/e− ratio reaching ~50% for a Pt rod. The inferred pair yield was ~ few ×10¹⁰ with emerging pair density reaching ~10¹⁵/cm³ so that the pair skin depth becomes