Used for studying the properties of cosmic ray muons, subatomic particle produced in the earth’s upper atmosphere but visible all the way down to sea level.  The physical properties under study include muon lifetimes, and muon capture on hydrogen and carbon nuclei.  The Michel electron from muon decay is currently being investigated.


  • Fast rise-time photomultiplier tubes (~1 nanosecond)
  • High Voltage supplies (up to ±3,000 volts)
  • Fast data acquisition equipment including TDCs with resolution down to 50 picoseconds
  • ADCs with sampling rates of 400 MHz

Lab Information

Location: STEM Bldg., Room 130

Contact Us: To speak to someone about this lab or any of our facilities, call us at 928-777-6600 or 800-888-3728, or email

Lab Director: Dr. Darrel Smith