03/03/2011

LLNL research on new materials for radiation detection highlighted in Innovation

Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov



LLNL researchers Steve Payne and Nerine Cherepy.
Photo by Jacqueline McBride/LLNL

The work of Steve Payne, Nerine Cherepy (both Chemical Sciences Division), and Natalia Zaitseva (Condensed Matter and Materials Division) on developing new materials for radiation detection was highlighted in an article in the February-March issue of Innovation.

Cherepy's team is developing a high-resolution scintillator material that operates at room temperature, is inexpensive, and can be manufactured in large volumes. Team members recently showed that europium-doped strontium iodide has higher conversion efficiency than cerium-doped lanthanum bromide. Small crystals have demonstrated 2.5 percent energy resolution, slightly better than lanthanum bromide detectors. This work was honored with a 2010 R&D 100 award.

Zaitseva's team is developing a material that can effectively separate a signature for neutrons from a strong background of gamma radiation by using pulse-shape discrimination. Team members have surveyed more than 140 organic compounds, all of which have characteristics known to be important for fast-neutron detection. Recently, they have discovered a compound with triple pulse-shape discrimination capabilities that can discriminate fast neutrons from thermal neutrons from gamma radiation. This material may also prove to be an effective antineutrino detector.

Innovation is a bimonthly magazine published by Technology Ventures Corporation in partnership with the DOE. It reports on new technologies, entrepreneurial activity, topics of interest to investors, activity at DOE and national laboratories and issues concerning technology transfer.






Founded in 1952, Lawrence Livermore National Laboratory is a national security laboratory, with a mission to ensure national security and apply science and technology to the important issues of our time. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.