标题： 水和水溶液中准自由态和气泡态正电子素的形成 显示英文标题

标题： Formation of quasi-free and bubble positronium states in water and aqueous solutions

摘要： 结果表明，在水溶液中正电子首先以准自由态形成正电子素原子，约50-100皮秒后，正电子素定域于纳米气泡中。 NaNO3 水溶液的湮灭谱分析表明，水合电子不参与正电子素（Ps）的形成。 显示英文摘要

摘要： It is shown that in aqueous solutions a positronium atom is first formed in the quasi-free state, and, after 50-100 ps, becomes localized in a nanobubble. Analysis of the annihilation spectra of NaNO3 aqueous solutions shows that the hydrated electron is not involved in the positronium (Ps) formation.