Eric B. Norman

Norman conducted multiple experiments involving measurements of cross sections for reactions important for understanding the synthesis of elements in stars. He also led research focused on of the impacts of high temperatures, and densities that occur in various astrophysical environments on the decay rates of key radioactive species such as 26Al, 44Ti, 54Mn,[9] and 176Lu. In another study, he demonstrated reaction rate sensitivity of 44Ti production in massive stars and highlighted the implications of a thick target yield measurement of 40Ca(α, γ)44Ti.

Norman has worked extensively on two aspects of neutrino physics, the solar neutrino problem,[10][11] and searches for neutrinoless double beta decay.[12] In the late 1980s and early 1990s, he led a group at Lawrence Berkeley National Laboratory (LBNL) in its participation in the Sudbury Neutrino Observatory (SNO).[13] His group designed and built the large geodesic structure that supported the nearly 10,000 photomultiplier tubes that were used to observe Cherenkov light from neutrino interactions in the D2O (heavy water) target.[14] He, along with co-workers also designed and built several devices that were used to accurately determine the energy calibration of the detector and also its neutron detection efficiency.[15] SNO ultimately solved the solar neutrino problem by demonstrating that two thirds of the electron-type neutrinos produced through fusion reactions in the Sun oscillate into mu- and/or tau- neutrinos before reaching the Earth. This measurement by the SNO collaboration led to the awarding of the 2015 Nobel Prize in physics and the 2015 Breakthrough Prize in Fundamental Physics.[16]

Since 1998, Norman in collaboration with his group, has been involved in the Cryogenic Underground Observatory for Rare Decays (CUORE).[17] This experiment is designed to search for the neutrinoless double beta decay of 130Te, which can only occur if neutrinos have finite masses and if neutrinos are their own anti-particles.[18] Observation of this decay mode could help to explain the origin of the matter/anti-matter asymmetry of the universe. This experiment is located in the Gran Sasso National Laboratory in Italy and utilizes approximately 1000 5x5x5-cm crystals of TeO2 operated as cryogenic bolometers at a temperature of approximate 10 mK.[19]

In 2002, Norman worked at Lawrence Livermore National Laboratory (LLNL), and became involved in a project focused on screening cargo containers for special nuclear material – that is 235U or 239Pu.[20] While working there, he along with his colleagues devised a scheme using fast neutrons to irradiate the cargo and then to look for high energy beta-delayed gamma rays emitted by fission products as the signature.[21] Subsequently, his group has worked on a number of experiments in nuclear forensics designed to determine the nature and/or origins of a variety of nuclear materials.[22]