Status of the electron accelerator for radioanalytical studies at Tohoku University

Ohtsuki, T.; Yuki, Heimei; Hirose, K.; Mitsugashira, Toshiaki

doi:10.1007/s10582-006-0529-0

Cited by 5 publications

(7 citation statements)

References 20 publications

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“…Comparing selection rules (39) in the dipole approximation with the selection rules (27) in the multipole approach, one can see that they do not impose any restrictions on the emission of photons. From eq.…”

Section: Vector Potential a And Integrated Matrix Elementmentioning

confidence: 99%

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Multipolar Approach for Description of Bremsstrahlung During α -Decay and Unified Formula of the Bremsstrahlung Probability

Maydanyuk¹

2009

TONPPJ

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Model of angular bremsstrahlung of photons emitted during α-decay is presented. A special emphasis is given on development of unified formalism of matrix elements in the dipole and multipolar approaches. A probability of the emission of photons calculated on the basis of the multipole model without any normalization on experimental data (i. e. in absolute scale) is found at 90• of the angle ϑαγ between directions of motion of the α-particle (with its tunneling under barrier) and emission of photons to be in a good agreement with the newest experimental data for the 210 Po, 214 Po, and 226 Ra nuclei. The spectrum for 244 Cm is found at ϑαγ = 25• to be in satisfactory agreement with high limit of errors of experimental data of Japanese group. A comparative analysis for the spectra calculated for 210 Po by the multipole and dipole approaches in the absolute scale and with normalization on experimental data is performed. The emission of photons from the internal well in the dipole approach is found to be not small while the multipolar approach does not show such a strong dependence. Distribution of the bremsstrahlung probability on the numbers of protons and nucleons of the α-decaying nucleus in selected region close to 210 Po is obtained. An unified formula of the bremsstrahlung probability during the α-decay of arbitrary nucleus expressed directly through the Qα-value and numbers Ap, Zp of nucleons and protons of this nucleus is proposed.

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Section: Vector Potential a And Integrated Matrix Elementmentioning

confidence: 99%

“…[39] it was reported about current investigations of bremsstrahlung accompanying the α-decay of the 228 Th nucleus. Let us estimate the absolute bremsstrahlung probability for this nucleus on the basis of the proposed model.…”

Section: Figmentioning

confidence: 99%

Multipolar Approach for Description of Bremsstrahlung During α -Decay and Unified Formula of the Bremsstrahlung Probability

Maydanyuk¹

2009

TONPPJ

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“…[54] (see p. D395), authors reported about experimental measurements of the bremsstrahlung accompanying -decay of the 228 Th nucleus and some perspectives. Of course, such experiments will be able to enlarge experimental data existed in this topic.…”

Section: But Whether Is It Possible To Describe the Bremsstrahlung Smentioning

confidence: 99%

“…In Ref. [39] it was reported about current investigations of bremsstrahlung accompanying the α-decay of the 228 Th nucleus. Let us estimate the absolute bremsstrahlung probability for this nucleus on the basis of the proposed model.…”

Section: Calculations and Analysismentioning

confidence: 99%

Multipolar Approach for Description of Bremsstrahlung During α-Decay and Unified Formula of the Bremsstrahlung Probability

Maydanyuk¹

2013

TONPPJ

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Improved multipolar model of photon bremsstrahlung accompanying -decay is presented. A special emphasis is given to the development of an angular formalism of matrix elements. The model gives values of the angular probability of the emission of photons in the absolute scale, without its normalization on experimental data. Spectra calculated on the basis of the model are found in a good agreement with the newest experimental data for the 210 Po, 214 Po, and 226 Ra nuclei. A unified formula for the bremsstrahlung, probability during the -decay of an arbitrary nucleus, defined directly on Q -value and numbers A d , Z d of nucleons and protons of this nucleus, has been constructed for the first time. Inside the region of the -decaying nuclei from 106 Te up to nucleus with A p = 266 and Z p = 109 at energy of the photons emitted from 50 keV up to 900 keV a good coincidence has been achieved between the spectra obtained by the multipolar model (where duration of calculations for one selected nucleus is up to 1 day), and the spectra obtained by the unified formula (where duration of calculations is about some seconds, using the same computer). Pacs: 23.60.+e, 23.20.Js, 03.65.Xp, 27.80.+w

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“…Our approach was successfully tested on set of tasks where experimental data on the emission of the bremsstrahlung photons in nuclear reactions is essentially larger. These are experimental data for α-decay [17,18,[30][31][32][33][34] (see also some calculations [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]), scattering of protons off nuclei [50][51][52][53][54][55][56][57][58][59] (see also reviews on situation in such a research [60,61]), spontaneous fission [62][63][64][65][66][67][68], etc. (see also predicted spectra for emission of protons from nuclei [23,25,26,69], ternary fission [24]).…”

Section: Introductionmentioning

confidence: 99%

Study of compound nucleus formation via bremsstrahlung emission in proton $α$-particle scattering

Maydanyuk,

Zhang

2016

Preprint

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In this paper a role of many-nucleon dynamics in formation of the compound 5 Li nucleus in the scattering of protons off α-particles at the proton incident energies up to 20 MeV is investigated. We propose a bremsstrahlung model allowing to extract information about probabilities of formation of such nucleus on the basis of analysis of experimental cross-sections of the bremsstrahlung photons. In order to realize this approach, the model includes elements of microscopic theory and also probabilities of formation of the short-lived compound nucleus. Results of calculations of the bremsstrahlung spectra are in good agreement with the experimental cross-sections.

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Status of the electron accelerator for radioanalytical studies at Tohoku University

Cited by 5 publications

References 20 publications

Multipolar Approach for Description of Bremsstrahlung During α -Decay and Unified Formula of the Bremsstrahlung Probability

Multipolar Approach for Description of Bremsstrahlung During α -Decay and Unified Formula of the Bremsstrahlung Probability

Multipolar Approach for Description of Bremsstrahlung During α-Decay and Unified Formula of the Bremsstrahlung Probability

Study of compound nucleus formation via bremsstrahlung emission in proton $α$-particle scattering

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