Science. 1978 Feb 17;199(4330):765-8. doi: 10.1126/science.199.4330.765.
A proton microprobe capable of focusing proton beams with energies up to 6 million electron volts to a spot size of 2 x 2 square micrometers has been used for chemical analysis of small grains of minerals in lunar samples by proton-induced x-ray emission. The proton microprobe is preferable to the electron microprobe for analyzing trace elements whose concentrations are below the detection limit of the latter and for analyzing objects with numerous major and trace elements with a wide range of atomic numbers. Application of the proton microprobe to biological samples is feasible.
一台能够将能量高达 600 万电子伏特的质子束聚焦到 2x2 平方微米的小点上的质子微探针，已被用于通过质子诱导 X 射线发射对月球样本中的小矿物颗粒进行化学分析。与电子探针相比，质子微探针更适合分析浓度低于后者检测限的微量元素，以及分析具有众多主要和微量元素且原子数范围广泛的物体。质子微探针在生物样品中的应用是可行的。
