Photofission in uranium by nuclear reaction gamma-rays

Morse, D.H.; Antolak, Arlyn J.; Doyle, B.L.

doi:10.1016/j.nimb.2007.04.271

Cited by 11 publications

(4 citation statements)

References 6 publications

(6 reference statements)

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“…Fission is one of the most studied reactions [1][2][3][4][5][6]. It involves all the nucleons inside the nucleus, and many different processes take place before the excited nucleus fissionate.…”

Section: Monte Carlo Simulation Of Heavy Nucleimentioning

confidence: 99%

Monte Carlo Simulation of Heavy Nuclei Photofission at Intermediate Energies

Andrade-II¹,

Freitas²,

Tavares³

et al. 2009

AIP Conference Proceedings

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A detailed description of photofission process at intermediate energies (200 to 1000 MeV) is presented. The study of the reaction is performed by a Monte Carlo method which allows the investigation of properties of residual nuclei and fissioning nuclei. The information obtained indicate that multifragmentation is negligible at the photon energies studied here, and that the symmetrical fission is dominant. Energy and mass distributions of residual and fissioning nuclei were calculated.

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Section: Monte Carlo Simulation Of Heavy Nucleimentioning

confidence: 99%

Monte Carlo Simulation of Heavy Nuclei Photofission at Intermediate Energies

Andrade-II¹,

Freitas²,

Tavares³

et al. 2009

AIP Conference Proceedings

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“…1,3 The design goals for the first test generator include a time-averaged beam current of ~1 A at an acceleration voltage of 180 kV and the capability of pulsed operation at 500 Hz and 20 µs pulse length for a duty factor of 1%. The analogous design goals for neutron source operation include the same pulsing scheme with a 1% duty factor, but at a significant lower time-averaged current of 100 mA for the generation of 10 11 n/s via the D(d,n) 3 He reaction. RF-driven ion sources have been shown to be capable of producing high extracted beam current with atomic ion species exceeding 90%.…”

Section: Coaxial Gamma/neutron Source Conceptmentioning

confidence: 99%

“…Pulsing the photon/neutron interrogation source makes it possible to take advantage of the full range of prompt & delayed neutron and gamma fission signatures. 3 High-yield systems exceeding 10 10 n/s using D-D reactions have previously been designed and, therefore, the neutron part of the dual neutron/gamma source is essentially in hand. Based on the same concept, a novel gamma source utilizing the 11 B(p,γ) 12 C reaction has been developed and is described in the following sections.…”

Section: Introductionmentioning

confidence: 99%

Coaxial Mono-Energetic Gamma Generator for Active Interrogation

Ludewigt¹,

Antolak²,

Henestroza³

et al. 2009

AIP Conference Proceedings

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Abstract. Compact mono-energetic photon sources are sought for active interrogation systems to detect shielded special nuclear materials in, for example, cargo containers, trucks and other vehicles. A prototype gamma interrogation source has been designed and built that utilizes the 11 B(p,γ) 12 C reaction to produce 12 MeV gamma-rays which are near the peak of the photofission cross section. In particular, the 11 B(p,γ) 12 C resonance at 163 kV allows the production of gammas at low proton acceleration voltages, thus keeping the design of a gamma generator comparatively small and simple. A coaxial design has been adopted with a toroidal-shaped plasma chamber surrounding a cylindrical gamma production target. The plasma discharge is driven by a 2 MHz rf-power supply (capable up to 50 kW) using a circular rfantenna. Permanent magnets embedded in the walls of the plasma chamber generate a multi-cusp field that confines the plasma and allows higher plasma densities and lower gas pressures. About 100 proton beamlets are extracted through a slotted plasma electrode towards the target at the center of the device that is at a negative 180 kV. The target consists of LaB 6 tiles that are brazed to a water-cooled cylindrical structure. The generator is designed to operate at 500 Hz with 20 µs long pulses, and a 1% duty factor by pulsing the ion source rf-power. A first-generation coaxial gamma source has been built for low duty factor experiments and testing.

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“…Monoenergetic, higher energy gamma rays could be of great use when high gamma ray penetrability [12] or photofission [13] is of interest. One example is in nuclear security applications where the gamma rays could be used to probe through shielding to uncover illicit special nuclear material (SNM) in transit [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High-energy γ rays resulting from low-energy nuclear reactions in light nuclei

Rose

Erickson

2018

Phys. Rev. C

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Products resulting from 3.02-MeV deuterons incident on a natural boron target have been investigated by way of gamma ray spectroscopy and activation analysis. This study uses observed gamma rays and cascades to deduce the populated states from the reaction products. Die-away measurements are included to investigate the built-up activation from the target and compared to tabulated half-lives to further understand the plethora of reactions taking place. Many of the observed gamma rays, such as 15.1 MeV, result from the formation of excited states of 12 C, while others are secondary and tertiary processes from α breakup resulting in 8 Be.

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Photofission in uranium by nuclear reaction gamma-rays

Cited by 11 publications

References 6 publications

Monte Carlo Simulation of Heavy Nuclei Photofission at Intermediate Energies

Monte Carlo Simulation of Heavy Nuclei Photofission at Intermediate Energies

Coaxial Mono-Energetic Gamma Generator for Active Interrogation

High-energy γ rays resulting from low-energy nuclear reactions in light nuclei

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