Erik Swanberg

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The excitation functions for proton and deuteron induced reactions on natural molybdenum for the production of ⁹⁹Mo were measured. The proton induced reaction was measured in the energy range of 11.3-49.6 MeV, and the deuteron induced reaction was measured in the energy range of 9.7-58.5 MeV. Both beams were generated by the 88" cyclotron located at(More)
T detection of illicit nuclear materials is a major tool in preventing and deterring nuclear terrorism. The detection task is extremely difficult because of physical limitations of nuclear radiation detectors, shielding by intervening cargo materials, and the presence of background noise. We aim at enhancing the capabilities of detectors with algorithmic(More)
The neutron-induced fission cross section of 238 Pu was determined using the surrogate ratio method. The (n,f) cross section over an equivalent neutron energy range 5–20 MeV was deduced from inelastic α-induced fission reactions on 239 Pu, with 235 U(α, α f) and 236 U(α, α f) used as references. These reference reactions reflect 234 U(n,f) and 235 U(n,f)(More)
B. L. Goldblum,1 S. R. Stroberg,1 J. M. Allmond,2 C. Angell,1 L. A. Bernstein,3 D. L. Bleuel,3 J. T. Burke,3 J. Gibelin,4 L. Phair,5 N. D. Scielzo,3 E. Swanberg,1 M. Wiedeking,3 and E. B. Norman1,3,5 1Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA 2Department of Physics, University of Richmond, Virginia 23173,(More)
This paper is the fifth in a series of articles on the basic physics of light yield nonproportionality in scintillators. Here, we compare and contrast the nonproportionality as registered by gamma rays and high-energy electrons. As has been noted in the past, these two types of data have different curve shapes (for plots of the light yield against electron(More)
This paper is the third in a series of articles on the basic physics of nonproportionality in scintillators. Here, we focus on the temperature dependence of six scintillators, NaI(Tl), CsI(Tl), CsI(Na), CeBr<sub>3</sub>, LaBr<sub>3</sub>(Ce), and undoped SrI<sub>2</sub>, and report their nonproportionality curves at -40<sup>&#x00B0;</sup>C,(More)
Due to its wide band gap (2.68 eV) and high stopping power, thallium bromide (TlBr) is being investigated as a room-temperature semiconductor gamma-ray spectrometer. When cooled to -20&#x00B0;C, performance of better than 1% FWHM at 662 keV has been observed on 5&#x00D7;5&#x00D7;5 mm<sup>3</sup> pixelated TlBr detectors. The room-temperature lifetime (under(More)
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