Most probable charge of fission products in 24 MeV proton induced fission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>238</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">U</mml:mi></mml:math>

Kudo, H.; Maruyama, Michio; Tanikawa, M.; Shinozuka, T.; Fujioka, M.

doi:10.1103/physrevc.57.178

Cited by 51 publications

(33 citation statements)

References 70 publications

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“…For the γ -spectroscopy data no corrections due to contributions from the precursors were applied since these are considered insignificant, taking into account the yield of the fission products as reported in [11]. The result from June 2013 has the largest uncertainty, but it is discarded since the spectrum was distorted by impurities of non identified elements.…”

Section: Resultsmentioning

confidence: 99%

Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

et al. 2017

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Th. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä. A direct ion counting measurement of the isomeric fission yield ratios was accomplished for the first time, registering the fission products in less than a second after their production. In addition, the IYRs of nat U were measured by means of γ -spectroscopy in order to verify the consistency of the recently upgraded experimental setup. From the obtained results, indications of a dependence of the production rate on the fissioning system can be noticed. These data were compared with data available in the literature, whenever possible. Using the TALYS code and the experimentally obtained IYRs, we also deduced the average angular momentum of the fission fragments after scission.

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Section: Resultsmentioning

confidence: 99%

Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

et al. 2017

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“…The spectroscopic analysis of induced activity is not generally provided with data on several isobars required for determination of necessary parameters. As in previous publications [20,21], in the present work several assumptions on the basis of results of earlier measurements and the empiric applications were made. The first assumption relates to the slow dependence of the parameter of charge distribution widths (C) on the product charge number (Z) for the regions with close mass numbers.…”

Section: Fissionmentioning

confidence: 97%

“…The bell shaped distribution obtained in (60-160) atomic mass range (Figure 1) is considered as a binary mode of fission of 220 Ra compound nucleus. The fission cross section was calculated based generally on the assumption of Gaussian function form for the fragment charge and mass distributions [20,21]. The cross section of independently produced fission fragments σ (A, Z) can be presented as Gaussian Z-distribution curve at given A-value:…”

Section: Fissionmentioning

confidence: 99%

Reactions 11b+209bi at Energies Above Coulomb Barrier

Demekhina

Balabekyan

Penionzhevich

et al. 2018

Eurasian J. Phys. Funct. Mater.

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Experimental data on production of radioactive residuals in 11 B + 209 Bi reaction a above-barrier projectile energy of 145.6 MeV are presented. The measurements and identification of reaction products were made using the method of induced activity. The residual nuclei in 24 ≤ A ≤ 211 mass range are considered as products of different interaction channels, occurring through evaporation at complete, incomplete fusion and the fission. The fragments in (60-160) atomic mass units range are regarded to the fission products and are confirmed with data from experiments with analogous fissile nuclei. The residual nuclei near target mass number can be presented as result of the different processes including emission of nucleons and light nuclei. Theoretical predictions within the frameworks of PACE-4 code simulation, allowing the predictions of formation, evaporation and fission of compound nuclei, were used for analyzing the measurement results. A substantial contribution to production of residual nuclei of the incomplete fusion and of additional mechanisms, proceeding at different impact parameters, were revealed at analysis of the experimental data.

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“…Other systematic uncertainties that might affect the measurement concern the overall transport efficiency of IGISOL, which can be regarded as the product of the physical transport efficiency p and the chemical transport efficiency c [71]. The former depends on the operating conditions of the mass separator, while the latter depends on the chemical properties of the elements.…”

Section: E Sources Of Uncertaintiesmentioning

confidence: 99%

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

et al. 2018

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Publisher's PDF Rakopoulos, V.; Lantz, M.; Solders, A.; Al-Adili, A.; Mattera, A.; Canete, Laetitia; Eronen, Tommi; Gorelov, Dmitry; Jokinen, Ari; Kankainen, Anu; Kolhinen, Veli; Moore, Iain; Nesterenko, Dmitrii; Penttilä, Heikki; Pohjalainen, Ilkka; Rinta-Antila, Sami; Simutkin, V.; Vilén, Markus; Voss, Annika; Pomp, S.Rakopoulos, V., Lantz, M., Solders, A., Al-Adili, A., Mattera, A., Canete, L., . . . Pomp, S. (2018). First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments. Physical Review C, 98 (2) We report the first experimental determination of independent isomeric yield ratios using direct ion counting with a Penning trap, which offered such a high resolution in mass that isomeric states could be separated. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä. The isomer production ratios of 81 Moreover, based on the isomeric yield ratios, the root-mean-square angular momenta (J rms ) of the fission fragments after scission were estimated using the TALYS code. The experimentally determined isomeric yield ratios, and consequently the deduced J rms , for 130 Sn are significantly lower compared to 128 Sn for both fissioning systems. This can be attributed to the more spherical shape of the fragments that contribute to the formation of 130 Sn, due to their proximity to the N = 82 shell closure. The values of J rms for 129 Sb are higher than 128 Sn for both reactions, despite the same neutron number of both nuclides (N = 78), indicating the odd-Z effect where fission fragments with odd-Z number tend to bear larger angular momentum than even-Z fragments. The isomer production ratio for the isotopes of Sn is more enhanced in the nat U(p, f ) reaction than in 232 Th(p, f ). The opposite is observed for 96 Y and 97 Y. These discrepancies might be associated to different scission shapes of the fragments for the two fission reactions, indicating the impact that the different fission modes can have on the isomeric yield ratios.

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Most probable charge of fission products in 24 MeV proton induced fission of238U

Cited by 51 publications

References 70 publications

Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

Reactions 11b+209bi at Energies Above Coulomb Barrier

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

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Most probable charge of fission products in 24 MeV proton induced fission of238U

Cited by 51 publications

References 70 publications

Measurements of isomeric yield ratios of fission products from proton-induced fission onnatU and232Th via direct ion counting

Measurements of isomeric yield ratios of fission products from proton-induced fission onnatU and232Th via direct ion counting

Reactions 11b+209bi at Energies Above Coulomb Barrier

First isomeric yield ratio measurements by direct ion counting and implications for the angular momentum of the primary fission fragments

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Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting

Measurements of isomeric yield ratios of fission products from proton-induced fission on^natU and²³²Th via direct ion counting