Nano-crystalline oxides of manganese prepared from the radiolysis of aqueous permanganic acid solution at ambient conditions showed structural and compositional changes with variation in absorbed gamma dose. The radiolytically formed nano-oxide was transformed into different micro-structures, phases, shapes and sizes with radiation. This variation was probed using X-ray powder diffraction (XRD), laser Raman spectroscopy (LRS) and transmission electron microscopy (TEM). At lower doses formation of a mixture of nano-oxides of Mn(OH)₂, λ-MnO₂ was detected from XRD analysis. This nano-oxide mixture changed to stable Mn₃O₄ at higher doses. The maximum crystallite size was observed to be ~15 nm. LRS results also supported this inference. This paper presents the detailed study on the phase transitions of the radiolytically formed nano-manganese oxides and the possibility of its use as radiation marker for predicting radiation response.

在环境条件下通过高锰酸水溶液的辐解制备的锰的纳米晶氧化物显示出结构和组成的变化，并随着吸收的伽马剂量的变化而变化。辐射分解形成的纳米氧化物通过辐射转变为不同的微结构、相、形状和尺寸。使用 X 射线粉末衍射 (XRD)、激光拉曼光谱 (LRS) 和透射电子显微镜 (TEM) 探测这种变化。在较低剂量形成Mn(OH) ₂的纳米氧化物混合物时，从XRD分析检测到λ-MnO ₂。这种纳米氧化物混合物变成了稳定的 Mn ₃ O ₄在更高的剂量。观察到最大微晶尺寸为~15 nm。LRS 结果也支持这一推论。本文详细介绍了辐射分解形成的纳米锰氧化物的相变及其用作预测辐射响应的辐射标记的可能性。