Search

Your search keyword '"Rutte, D"' showing total 3 results
Start Over Author "Rutte, D" Topic nuclear
3 results on '"Rutte, D"'

1. Design, construction, and characterization of a compact DD neutron generator designed for 40Ar/39Ar geochronology

Author

Ayllon, M, Adams, PA, Batchelder, JC, Bauer, JD, Becker, TA, Bernstein, LA, Chong, SA, James, J, Kirsch, LE, Leung, KN, Matthews, EF, Morrell, JT, Renne, PR, Rogers, AM, Rutte, D, Voyles, AS, Van Bibber, K, and Waltz, CS

Subjects
DD neutron generator, MCNP simulations, Ion beam optics, Flux characterization, Geochronology, COMSOL Multiphysics, physics.acc-ph, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences
Abstract

A next-generation, high-flux DD neutron generator has been designed, commissioned, and characterized, and is now operational in a new facility at the University of California Berkeley. The generator, originally designed for 40Ar/39Ar dating of geological materials, has since served numerous additional applications, including medical isotope production studies, with others planned for the near future. In this work, we present an overview of the High Flux Neutron Generator (HFNG) which includes a variety of simulations, analytical models, and experimental validation of results. Extensive analysis was performed in order to characterize the neutron yield, flux, and energy distribution at specific locations where samples may be loaded for irradiation. A notable design feature of the HFNG is the possibility for sample irradiation internal to the cathode, just 8 mm away from the neutron production site, thus maximizing the neutron flux (n/cm2/s). The generator's maximum neutron flux at this irradiation position is 2.58 × 107 n/cm2/s ± 5% (approximately 3 × 108 n/s total yield) as measured via activation of small natural indium foils. However, future development is aimed at achieving an order of magnitude increase in flux. Additionally, the deuterium ion beam optics were optimized by simulations for various extraction configurations in order to achieve a uniform neutron flux distribution and an acceptable heat load. Finally, experiments were performed in order to benchmark the modeling and characterization of the HFNG.

Published
2018

2. Measurement of the 64Zn,47Ti(n,p) cross sections using a DD neutron generator for medical isotope studies

Author

Voyles, AS, Basunia, MS, Batchelder, JC, Bauer, JD, Becker, TA, Bernstein, LA, Matthews, EF, Renne, PR, Rutte, D, Unzueta, MA, and van Bibber, KA

Subjects
DD neutron generator, Medical isotope production, Scandium (Sc) and copper, radioisotopes, Indium, Ratio activation, Theranostics, nucl-ex, Applied Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Geochemistry, Interdisciplinary Engineering
Abstract

Cross sections for the 47Ti(n,p)47Sc and 64Zn(n,p)64Cu reactions have been measured for quasi-monoenergetic DD neutrons produced by the UC Berkeley High Flux Neutron Generator (HFNG). The HFNG is a compact neutron generator designed as a “flux-trap” that maximizes the probability that a neutron will interact with a sample loaded into a specific, central location. The study was motivated by interest in the production of 47Sc and 64Cu as emerging medical isotopes. The cross sections were measured in ratio to the 113In(n,n′)113mIn and 115In(n,n′)115mIn inelastic scattering reactions on co-irradiated indium samples. Post-irradiation counting using an HPGe and LEPS detectors allowed for cross section determination to within 5% uncertainty. The 64Zn(n,p)64Cu cross section for 2.76-0.02+0.01 MeV neutrons is reported as 49.3 ± 2.6 mb (relative to 113In) or 46.4 ± 1.7 mb (relative to 115In), and the 47Ti(n,p)47Sc cross section is reported as 26.26 ± 0.82 mb. The measured cross sections are found to be in good agreement with existing measured values but with lower uncertainty (

Published
2017

3. Possible evidence of nonstatistical properties in the Cl35(n, p)S35 cross section

Author

Batchelder, JC, Chong, S-A, Morrell, J, Unzueta, M Ayllon, Adams, P, Bauer, JD, Bailey, T, Becker, TA, Bernstein, LA, Fratoni, M, Hurst, AM, James, J, Lewis, AM, Matthews, EF, Negus, M, Rutte, D, Song, K, Van Bibber, K, Wallace, M, and Waltz, CS

Subjects
Particle and Plasma Physics, Molecular, Nuclear, Atomic, Nuclear & Particles Physics
Abstract

The Cl35(n,p) and Cl35(n,α) cross sections at incident neutron energies between 2.42 and 2.74 MeV were measured using the Berkeley High Flux Neutron Generator. The cross sections for Cl35(n,p) were more than a factor of 3 to 5 less than all of the values in the neutron absorption data libraries, while the Cl35(n,α) cross sections are in reasonable agreement with the data libraries. The measured energy-differential cross section is consistent with a single resonance with a width of 293(46) keV. This result suggests that, despite the high incident neutron energy, any attempt to model (n,x) cross sections in the vicinity of the N=Z=20 shell gap requires a resolved resonance approach rather than a Hauser-Feshbach approach.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results