Photon activation analysis as a tool for evidentiary sample identification: a feasibility study

Starovoitova, Valeriia N.; Segebade, Christian

doi:10.1007/s10967-016-4964-5

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Intense x-ray and gamma-ray beams have potential novel applications in many research branches, including nuclear physics and laboratory astrophysics [1][2][3], proton activation analysis (PAA) in materials research [4][5][6][7], radiography of high-energy-density (HED) matter [7], electron-positron pair production [8], and medical isotope production for radiation oncology [9]. In addition, nuclear resonance fluorescence (NRF) studies are attractive for the development of isotope selective techniques [10].…”

Section: Introductionmentioning

confidence: 99%

Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material

et al. 2023

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High performance of laser-driven sources of radiation is in focus of research aimed at the study of high energy density matter, pair production and neutron generation using kJ PW-laser systems. In this work, we present a highly efficient approach to generate an ultra-high flux, high-energy bremsstrahlung in the interaction of direct laser-accelerated (DLA) electrons with a several-millimeters-thick high-Z converter. A directed beam of direct laser-accelerated electrons with energies up to 100 MeV was produced in the interaction of a sub-ps laser pulse of moderate relativistic intensity with long-scale plasma of near-critical density obtained by irradiation of low-density polymer foam with an ns laser pulse. In the experiment, tantalum isotopes generated via photonuclear reactions with threshold energies above 40 MeV were observed. The Geant4 Monte Carlo code, with the measured electron energy and angular distribution as input parameters, was used to characterize the bremsstrahlung spectrum responsible for the registered yields of isotopes from 180Ta to 175Ta. It is shown that when the direct laser-accelerated electrons interact with a tantalum converter, the directed bremsstrahlung with an average photon energy of 18 MeV and ∼2⋅1011 photons per laser shot in the energy range of giant dipole resonance (GDR) and beyond (≥7.5 MeV) is produced. This results in an ultra-high photon flux of ∼6 × 1022 sr−1·s−1 and a record conversion efficiency of 2% of the focused laser energy into high-energy bremsstrahlung.

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Section: Introductionmentioning

confidence: 99%

Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material

et al. 2023

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Principles, methodologies, and applications of photon activation analysis: a review

Segebade

Starovoitova

Borgwardt

et al. 2017

J Radioanal Nucl Chem

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Photon activation analysis of sand samples from Antalya in Turkey with a clinical electron linear accelerator

Eke

Boztosun

Segebade³

2018

Radiochimica Acta

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The purpose of this study is to demonstrate the feasibility of elemental analysis of sand samples by photon activation induced by high energy bremsstrahlung photons at an end point energy of 18 MeV from a clinical electron linear accelerator. The γ-ray spectra of the activated samples were collected using a high resolution spectrometer. Qualitative analysis of major and trace components of the samples (12 in total) was carried out whilst the spectra of eight of the samples were evaluated quantitatively. The contents of elements obtained by photon activation analysis were compared with values obtained by X-ray fluorescence.

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Photon activation analysis as a tool for evidentiary sample identification: a feasibility study

Cited by 3 publications

References 19 publications

Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material

Ultra-high efficiency bremsstrahlung production in the interaction of direct laser-accelerated electrons with high-Z material

Principles, methodologies, and applications of photon activation analysis: a review

Photon activation analysis of sand samples from Antalya in Turkey with a clinical electron linear accelerator

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