NSRL works in collaboration with accelerator mass spectrometry (AMS) measurement facilities to provide state-of-the-art radiocarbon preparation and measurement services to the local University and Federal research communities.  The lab also pursues in-house research on applications of 14C dating to climate change studies, calibration of the 14C timescale, and the use of 14C as a geochemical and geophysical tracer in the Earth system.

Photo of Scott Lehman

Scott Lehman

Photo of Chad Wolak

Chad Wolak
Lab Manager

Photo of Patrick Cappa

Patrick Cappa
Research staff

Photo of Steve Morgan

Steve Morgan
Research staff

Photo of Michael Dyonisius

Michael Dyonisius 
Research scientist

  • Colin Lindsay, Postdoctoral Investigator, 2016-2018
  • Nicole Trahan, Postdoctoral Investigator 2012-2014
  • John Knowles, Guest Investigator 2012-2015
  • Sean Bryan, GRA 2010-2014
  • Jocelyn Turnbull, GRA, PRA 1997-2006; now at National Isotope Center, New Zealand
  • Trevor Popp, PRA, now at Niels Bohr Institute, Denmark


Contact & Services

Lab phone: 303 492-0362

Please contact Chad Wolak, Laboratory Manager, 303 492-5019 regarding routine sample submissions.

Chad Wolak packs samples. Photo by Ethan Welty

Chad Wolak packs radiocarbon samples. Photo by Ethan Welty. 



NSRL maintains an active collaboration with the NOAA’s Boulder-based Global Monitoring Division (GMD) aimed at development and use of ultra-precise 14C measurement in CO2 as a quantitative tracer for recently-added, fossil fuel derived CO2 in the atmosphere.

Media stories


Publications by Lehman can be found on his Google Scholar profile.  Those by Dyonisius are included below.