Development of the superorruba detector array and the measurement of single particle states in 81Ge

S. Ahn, The University of Tennessee, Knoxville
A. S. Adekola, Rutgers University–New Brunswick
D. W. Bardayan, Oak Ridge National Laboratory
J. C. Blackmon, Louisiana State University
K. Y. Chae, Oak Ridge National Laboratory
K. A. Chipps, Colorado School of Mines
J. A. Cizewski, Rutgers University–New Brunswick
J. Elson, Washington University in St. Louis
S. Hardy, Rutgers University–New Brunswick
M. E. Howard, Rutgers University–New Brunswick
K. L. Jones, The University of Tennessee, Knoxville
R. L. Kozub, Tennessee Technological University
B. Manning, Rutgers University–New Brunswick
M. Matos, Louisiana State University
C. D. Nesaraja, Rutgers University–New Brunswick
P. D. O'malley, Rutgers University–New Brunswick
S. D. Pain, Oak Ridge National Laboratory
W. A. Peters, Oak Ridge Associated Universities
S. T. Pittman, The University of Tennessee, Knoxville
B. C. Rasco, Louisiana State University
M. S. Smith, Oak Ridge National Laboratory
L. G. Sobotka, Washington University in St. Louis
I. Spassova, Oak Ridge Associated Universities


The study of nuclei far from stability elucidates the evolution of nuclear shell structure, and also affects estimates of heavy element nucleosynthesis in supernova explosions. Measurement of transfer reactions in inverse kinematics with radioactive ion beams is a powerful technique for these types of studies. Rare isotope beams often have relatively low intensities, and this places difficult requirements on the detection systems for reaction products. The detectors must provide large solid angle coverage in the laboratory along with good position and energy resolution. The Super ORRUBA detector array has been developed for such measurements and is comprised of 18 double-sided, nonresistive silicon strip detectors. This configuration features low thresholds and improved resolution over detectors employing charge division. As a first implementation of this system, the 80Ge(d,p)81Ge neutron transfer reaction in inverse kinematics was measured at HRIBF at ORNL, to determine the properties of levels in 81Ge. © 2013 AIP Publishing LLC.