Gamma-ray spectrum from Cd induced by fast neutrons in indoor experiments

Bondar, B.M.; Gorbachenko, O.M.; Leshchenko, B.Yu.; Каденко, І.; Plujko, V. A.; Solodovnyk, Kateryna

doi:10.1016/j.nuclphysa.2021.122192

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…At wavelengths >0.56 Å, over 99.99% of the incident neutrons are absorbed by 1 mm of Cd. The absorption of neutrons causes the emission of a range of high energy gammas on the order of several MeV [47]. 10 ms frames, triggered on the synchrotron t 0 pulse, were recorded and post processed to extract the time of arrival of events and reconstruct the time of flight spectra.…”

Section: Gamma Rejection-beamline Performancementioning

confidence: 99%

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Mann,

Schooneveld,

Rhodes

et al. 2024

J. Phys. D: Appl. Phys.

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A neutron sensitive scintillator employing nanoparticles of ZnS:Ag has been developed for the first time. Pulse shape differences between neutron and gamma signals were observed in this material and neutron-gamma discrimination was applied. With initial signal processing parameters, gamma sensitivities of 8.5 × 10-6 to 60Co gammas were achieved. The average primary decay of neutron scintillation in nanoparticle ZnS:Ag/6LiF was measured to be 18ns, and afterglow was significantly suppressed in comparison to standard ZnS:Ag/6LiF scintillators that employ micron sized ZnS:Ag. Fast decay times and minimal afterglow indicate potential for use in high count rate capability applications. Prospective count rate capabilities were investigated here as proof of concept, with rates of 1.12Mcps measured for a single readout channel with less than 3.5% count loss. This is approximately 70 times greater than the count rate capability of the current standard ZnS:Ag/6LiF scintillation detectors. With improvements to signal processing and scintillator composition, nanoparticle ZnS:A/6LiF could be a promising candidate for future high rate capability neutron detectors.

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Section: Gamma Rejection-beamline Performancementioning

confidence: 99%

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Mann,

Schooneveld,

Rhodes

et al. 2024

J. Phys. D: Appl. Phys.

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“…Усереднені ймовірності процесів фотопоглинання та -розпаду можна описати за допомогою фотонних силових функцій (ФСФ) [1 -6]. Такі функції використовуються як для дослідження фундаментальних властивостей атомних ядер (деформацій, характеристик гігантських дипольних резонансів (ГДР), внеску компоненту сил, які залежать від швидкості тощо), так і в прикладних застосуваннях (наприклад, ядерна енергетика, медична фізика, астрофізика, врахування систематичних похибок вимірювань нейтронних спектрів [7,8]). Дипольні електричні (Е1) -переходи є домінуючими, коли вони відбуваються одночасно з переходами іншої мультипольності.…”

Section: вступunclassified

Description of photoabsorption using photon strength function with the excitation of two resonance states

Gorbachenko¹,

Plujko²,

Kucher³

et al. 2023

Nucl. Phys. At. Energy

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The results of the use of photon strength function (PSF) of the model of two coupled damped oscillators (Two State Excitations, TSE) for the description of nuclear data for photoabsorption of electric dipole gamma-rays by atomic nuclei are presented. The response function widths dependent on gamma-ray energy were used instead of constant widths in the initial TSE model. It was demonstrated that such a phenomenological approach is a simple method for the description and prediction of the PSF with excitation of both low-energy (pigmy) dipole resonance (PDR) and high-energy giant dipole resonance (GDR). The best description of the experimental photoabsorption cross-sections is obtained at constant width in the PDR range and linear or quadratic energy-dependent width in the GDR range.

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“…The cadmium element is widely used in the reactor industry as the neutron absorber. It can be noted [3] that gamma-spectrum from thermal neutrons is also needed for accurate estimation of gamma spectrum for the fast neutrons in indoor experiments due to the possibility of re-scattering of fast neutrons on the experimental facilities and surroundings down to the thermal energies.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2021

Nucl. Phys. At. Energy

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The average gamma-ray spectrum of 114 Cd after thermal neutron capture in 113 Cd was evaluated in units of mb/MeV. Two approaches are considered for estimation of the average gamma-ray spectrum with normalization of the experimental data: mean spectra for all gamma-energies were found by averaging frequency polygon for experimental data histogram, and mean spectra were estimated as the combination of theoretical values at low gamma-ray energies and averaging experimental data in high-energy range. The experimental spectra were evaluated from the gamma-intensities presented by Mheemeed et al. [A. Mheemeed et al. Nucl. Phys. A 412 (1984) 113] and Belgya et al. [T. Belgya et al. EPJ Web of Conf. 146 (2017) 05009]. They were normalized to the average theoretical spectrum which was calculated using EMPIRE and TALYS codes. The procedure of normalization of the high-energy part of the spectrum was described. Estimated gamma-spectra for 113 Cd( ,{ }) n xγ reaction induced by thermal neutrons were presented.

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Gamma-ray spectrum from Cd induced by fast neutrons in indoor experiments

Cited by 4 publications

References 19 publications

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Description of photoabsorption using photon strength function with the excitation of two resonance states

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Gamma-ray spectrum from Cd induced by fast neutrons in indoor experiments

Cited by 4 publications

References 19 publications

Nanoparticle ZnS:Ag/6LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/6LiF—a new high count rate neutron scintillator with pulse shape discrimination

Description of photoabsorption using photon strength function with the excitation of two resonance states

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Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination

Nanoparticle ZnS:Ag/⁶LiF—a new high count rate neutron scintillator with pulse shape discrimination