To obtain such positron microbeam, it is necessary to use objective lenses, which are commonly used in the electron microscopy. We also attempted to form the positron microbeam using a positron beam for the positron diffraction experiment and a SEM optics [6]; [7] ; [8].
Publicly Traded Companies that Benefited from Forced or Slave Labor, 1929-1945 CalPERS
Click the link for more information. , the system gradually died out, to be replaced by the repartimientorepartimiento. , in Spanish colonial practice, usually, the distribution of indigenous people for forced labor. In a broader sense it referred to any official distribution of goods, property, services, and the like.