University of Tennessee Physics

Dr. Carroll Bingham

Professor
Ph.D., University of Tennessee, 1965

Office: 607 Science and Engineering Building
Phone: 865-974-7802
Fax: 865-974-7843
Web Site: http://web.utk.edu/~bingham
cbingham@utk.edu


EXPERIMENTAL NUCLEAR STRUCTURE

Heavy Ions

Nuclear structure is studied via an active experimental program that is rather varied. The energies and other quantum properties of nuclear states are determined via gamma-ray and charged particle decay spectroscopy, and these data are used to test and clarify various models of nuclei. Much of work involves a study of the interaction of single particle and collective degrees of freedom within interesting nuclei. New information and understanding often comes from the study of nuclei under various form of stress, and we investigate nuclei under two forms of stress: 1) an imbalance of protons and neutrons apparent in nuclei far from beta stability, and 2) centrifugal force resulting from rapid rotation of deformed nuclei.

Nuclei far from stability decay rather quickly via several competing mechanisms. Most of our work has concentrated on nuclei with an excess of protons, and hence, the competing decay mechanisms are electron capture/positron emission, alpha particle emission, and at the limits of nuclear stability, proton emission. The first of these most often populates a number of excited states in the daughter nuclei, which subsequently decay to their ground states via gamma emission and internal conversion. Conversion electron rates are used to observe the difference in angular momentum of the initial and final states. Hence, the observation of gamma rays and conversion electrons provides an excellent tool for the determination of the properties of low-lying nuclear states. Proton radioactivity provides an excellent tool to observe nuclei at the edge of the nuclear stability region, and to measure the angular momentum of the ground states of these exotic nuclei.

Decay studies were carried out for about 20 years at the Holifield Heavy-Ion Research Facility (HHIRF) utilizing the University Isotope Separator (UNISOR). About 10 years ago, a program of proton and alpha decay studies was started at the Argonne National Laboratory Linear Accelerator (ATLAS) utilizing an on-line fragment mass analyzer (FMA). More recently, the decay program was moved to the Recoil Mass Spectrometer (RMS) at the newly-developed Holifield Radioactive-Ion Beam Facility (HRIBF) in Oak Ridge.

Brief Vita

Carrol R. Bingham, Professor of Physics, earned a B.S. in Nuclear Engineering and a M.S. in Applied Physics from North Carolina State University in 1960 and 1962, respectively, and the Ph.D. degree from the University of Tennessee in 1965. After a year of Postdoctoral Research at Oak Ridge National Laboratory (ORNL), he joined the faculty at the University of Tennessee in 1966. Since 1966, he has also held a part-time appointment with the Electronuclear and Physics Divisions at ORNL. He spent a sabbatical appointment at Kernfysisch Versneller Instituut in Groningen, The Netherlands in 1975. He is the author or co-author of approximately 300 research papers in nuclear physics and has been a principal investigator for a DOE research project on Nuclear Spectroscopic Studies since 1975. Since 1991, he has been the University member of the policy council and fiscal director for the Joint Institute for Heavy Ion Research (JIHIR), which is comprised of other members of Vanderbilt University and ORNL. It is supported by the University through the UTK/ORNL Science Alliance Center of Excellence and the other two members of the JIHIR.

Selected Publications

  1. J. A. Vrba, C. R. Bingham, M. W. Guidry, R. E. Neese, E. E. Gross, T. P. Cleary, D. C. Hensley, and E. V. Hungerford, "A Search for Alpha Decay of High Spin Isomers in Rare Earth Nuclei," Phys. Rev. {22}, 755 (1980).
  2. J. A. Bounds, C. R. Bingham, P. Juncar, H. K. Carter, G. A. Leander, R. L. Mlekodaj, E. H. Spejewski, and W. M. Fairbank, Jr., "Role of Deformation in the Intrusion of the h$_{9/2}$ Levels Below the Z=82 Proton Shell," Phys. Rev. Lett. {55}, 2269 (1985).
  3. C. R. Bingham, L. L. Riedinger, L. H. Courtney, Z. M. Liu, A. J. Larabee, M. Craycraft, D. J. G. Love, P. J. Nolan, A. Kirwan, D. Thornley, P. Bishop, A. H. Nelson, M. A. Riley, and J. C. Waddington, "Three Band Crossings in the Yrast Structure of $^{162}$Hf," J. Phys. G: Nucl. Phys. {14}, 177 (1988).
  4. C. N. Davids, P. J. Woods, H. T. Penttila, J. C. Batchelder, C. R. Bingham, D. J. Blumenthal, L. T. Brown, B. C. Busse, L. F. Conticchio, T. Davinson, D. J. Henderson, R. J. Irvine, D. Seweryniak, K. S. Toth, W. B. Walters, and B. E. Zimmerman, "Proton Decay of an Intruder State in 185Bi," Phys. Rev. Lett. {76}, 592 (1996).
  5. C. R. Bingham, J. C. Batchelder, K. Rykaczewski, K. S. Toth, C.-H. Yu, T. N. Ginter, C. J. Gross, R. Grzywacz, M. Karny, S. H. Kim, B. D. MacDonald, J. Mas, J. W. McConnell, P. B. Semmes, J. Szerypo, and William Weintraub, "Identification of a proton emitting isomer in 151Lu," Phys. Rev. C 59, R2984 (1999).
  6. R. Grzywacz, C. H. Yu, Z. Janas, S. D. Paul, J. C. Batchelder, C. R. Bingham, T. N. Ginter, C. J. Gross, J. McConnell, M. Lipoglavsek, A. Piechaczek, D. C. Radford, J. J. Ressler, K. Rykaczewski, J. Shergur, W. B. Walters, E. F. Zganjar, C. Baktash, M. P. Carpenter, R. V. F. Janssens, C. E. Svensson, J. C. waddington, D. Ward, and E. Dragulescu, "In-beam study of the N=Z nucleus 6633As33 using the decay tagging technique," Nuclear Physics A682, 41c, 2001.