Nuclear Chemistry, Nuclear Structure, Radioactive Decay (including proton decay), Explosive Nucleosynthesis (r-process and rp-process), Nuclear Moments, Exotic Nuclei
Major Recognitions and Honors
My research focuses on the structure and decay of “drip-line” nuclides, that is, nuclides for which the least bound nucleon is about to “drip” off. The overall aim of this research is to uncover and examine the differences in nuclear structure and decay for nuclides in which the last nucleons are not tightly bound. Some of the work will have major implication for nuclear astrophysics as noted below.
Work at Argonne National Laboratory
The recent work in proton decay has proved a rich source of new insight into the location of the proton drip line and the kinds of decay observed for those nuclides. GAMMASPHERE has been used to determine the structure of a number of nuclides near and beyond the proton and neutron drip lines. Studies of nuclei near 68Ni have provided data to support the idea of a new defined region of shape coexistence. Correlating data from ANL, MSU, and ISOLDE has proven of great value. In other studies, deep inelastic reaction data are used to unravel the structure of Zn, Ge, and Se nuclei. Studies using the Fragment Mass Analyzer have centered on nuclei near 100Sn.
Work at the National Superconducting Cyclotron Laboratory at MSU.
The development of the Beta Counting System at the NSCL by Paul Mantica (see below) and Sean Liddick has moved that lab to the forefront of the study of exotic nuclei. As at ANL, recent data have been centered on Co, Ni, and Cu nuclei.
Work at the ISOLDE on-line mass separator at CERN
Following a decade of work at ISOLDE on the structure and decay of neutron-rich nuclei that lie in the path of the astrophysical r-process, new work has centered on nuclei with A < 100 that involve both decay studies and level-lifetime measurements.
Other research interests.
Other interests include study of neutron capture gamma rays for measuring trace element concentrations at NIST, detection of neutrinos for geology and new detection methods for nuclear forensics and radioactivity for national security purposes.
Recent graduate students and their current positions:
Scott H. Faller, Ph. D. 1986 Staff Scientist, Environmental Protection Agency, Las Vegas
John. D. Robertson, Ph. D. 1986 Professor of Chemistry, University of Missouri, FACS
Craig A. Stone, Ph. D. 1987 Associate Professor of Chemistry, San Jose State University
Paul F. Mantica, Ph. D. 1990 Distinguished Professor of Chemistry, Michigan State U., FACS
Brian E. Zimmerman, Ph. D. 1992 Staff Scientist, Nat. Inst. of Standards and Technology
Diana M. Ciurczak, Ph. D. May 1997. Staff Scientist, FBI, Washington, DC.
Joseph Swider Ph. D. May 1998 Analytical Chemist McCrone Associates
Jennifer Jo Ressler, Ph. D. September 2001 Scientist Lawrence Livermore National Laboratory
Jason Shergur, Ph. D. May 2005 Homeland Security official
Nate Hoteling, Ph. D. September 2008, Homeland Security official, Andrews Air Force Base