In Auger spectroscopy, beam currents are typically _____ in a beam of diameter 0.5mm.$

• A. 5-10 ¬¨¬®¬¨¬µA
• B. 5-20 ¬¨¬®¬¨¬µA
• C. 5-30 ¬¨¬®¬¨¬µA
• D. 5-50 ¬¨¬®¬¨¬µA