text: *ARPES, Angle-resolved photoemission spectroscopy
  *UPS, Ultraviolet photoelectron spectroscopy
  *PES, Photoemission spectroscopy
  *ZEKE, Zero electron kinetic energy spectroscopy
  *AES, Auger electron spectroscopy
  *EDS, Energy-dispersive X-ray spectroscopy, (EDX or EDXRF)
  *PEEM, Photoelectron emission microscopy