Automatic data acquisition and analysis in activation experiments

Белышев, С. С.; Stopani, K. A.

doi:10.3103/s0027134913010049

Cited by 9 publications

(5 citation statements)

References 4 publications

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“…The experimental setup and the data analysis procedures are described in Refs. [26][27][28][29]. The experiment was performed using bremsstrahlung radiation produced by the 70-MeV race-track microtron of the Skobeltsyn Institute of Nuclear Physics of the Moscow State University [30] at the electron energies T = 19.5, 29.1, 48.3, and 67.7 MeV.…”

Section: A Experimental Setupmentioning

confidence: 99%

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

et al. 2015

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Photon activation technique is used to obtain photofission mass distributions of 238 U after irradiation in a bremsstrahlung beam with end-point energies 19.5, 29.1, 48.3, and 67.7 MeV. The weights of the symmetric (SL) and asymmetric (STI and STII) modes in the mass distributions of photofission of 238 U and neutron-induced fission of 235,238 U at the average excitation energies of up to 20 MeV are calculated on the basis of the obtained results and other available data. The weight of the SL mode increases by about an order of magnitude as the average excitation energy increases from 8.5 to 17 MeV, while the weight of the STI mode decreases by two times, and the weight of the STII mode slightly increases. It is shown that the peak-to-valley ratios in photofission of 238 U and neutron-induced fission of 235 U are very close across almost the whole studied energy range. A similar conclusion is made concerning the behavior of asymmetric and symmetric fission modes in photofission of 238 U and neutron-induced fission of 235 U and 238 U.

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Section: A Experimental Setupmentioning

confidence: 99%

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

et al. 2015

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“…The obtained series of gamma-ray spectra were analyzed using the spectrum analysis software described in [6]. Unstable products of photonuclear reactions were identified in the spectra by energies and intensities of their peaks and for each peak a decay curve was fitted to obtain the yield.…”

Section: Experimental Technique and Resultsmentioning

confidence: 99%

Empirical estimation of astrophysical photodisintegration rates of ¹⁰⁶Cd

2017

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Abstract. It has been noted in previous experiments that the ratio between the photoneutron and photoproton disintegration channels of 106 Cd might be considerably different from predictions of statistical models. The thresholds of these reactions differ by several MeV and the total astrophysical rate of photodisintegration of 106 Cd, which is mostly produced in photonuclear reactions during the p-process nucleosynthesis, might be noticeably different from the calculated value. In this work the bremsstrahlung beam of a 55.6 MeV microtron and the photon activation technique is used to measure yields of photonuclear reaction products on isotopically-enriched cadmium targets. The obtained results are compared with predictions of statistical models. The experimental yields are used to estimate photodisintegration reaction rates on 106 Cd, which are then used in nuclear network calculations to examine the effects of uncertainties on the produced abundences of p-nuclei.

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“…The selection of the peak maximum in the spectra was carried out using an automatic system for registration and analysis of spectra specially designed for this purpose. Spectra with the duration of 3.5 s each were saved into the database, and the analysis system allowed us to summarize them and display the total spectrum with assigned duration [ 32 ]. Activity and yields of the produced isotopes were determined using areas of the most intensive peaks corresponding to the decay of the resulting isotope in spectra of residual activity, taking into account duration of irradiation, duration of transportation and registration of spectrum, and also efficiency of gamma-quanta registration and quantum yield of gamma-transition.…”

Section: Methodsmentioning

confidence: 99%

Yields of Photo-Proton Reactions on Nuclei of Nickel and Separation of Cobalt Isotopes from Irradiated Targets

et al. 2022

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Nowadays, cobalt isotopes 55Co, 57Co, and 58mCo are considered to be promising radionuclides in nuclear medicine, with 55Co receiving the most attention as an isotope for diagnostics by positron emission tomography. One of the current research directions is dedicated to its production using electron accelerators (via photonuclear method). In our work, the yields of nuclear reactions occurring during the irradiation of natNi and 60Ni by bremsstrahlung photons with energy up to 55 MeV were determined. A method of fast and simple cobalt isotopes separation from irradiated targets using extraction chromatography was developed.

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Automatic data acquisition and analysis in activation experiments

Cited by 9 publications

References 4 publications

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

Empirical estimation of astrophysical photodisintegration rates of ¹⁰⁶Cd

Yields of Photo-Proton Reactions on Nuclei of Nickel and Separation of Cobalt Isotopes from Irradiated Targets

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Automatic data acquisition and analysis in activation experiments

Cited by 9 publications

References 4 publications

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

Mass yield distributions and fission modes in photofission ofU238below 20 MeV

Empirical estimation of astrophysical photodisintegration rates of 106Cd

Yields of Photo-Proton Reactions on Nuclei of Nickel and Separation of Cobalt Isotopes from Irradiated Targets

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Empirical estimation of astrophysical photodisintegration rates of ¹⁰⁶Cd