A method and setup for studying the energy dependence of delayed neutron characteristics in nuclear fission induced by neutrons from the T(p, n), D(d, n), and T(d, n) reactions

Piksaikin, V.M.; Semenova, N. N.; Mil'shin, V. I.; Roshchenko, V. A.; Korolev, G. G.

doi:10.1134/s0020441206060030

Cited by 7 publications

(14 citation statements)

References 7 publications

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“…Because the pre-fission neutron spectra of second and third chance fissions are not provided in JENDL-4.0, we simply approximate ǫ ′ n = ǫ ′′ n = 0 to calculate Eq. (8). The effect of finite ǫ ′ n and ǫ ′′ n is discussed in sec.…”

Section: Second and Third Chance Fissionmentioning

confidence: 99%

“…In order to estimate the effect of finite pre-fission neutron energy, we calculate the delayed neutron yields of 238 U and 241 Pu varying ǫ ′ n and ǫ ′′ n in Eq. (8). We simply approximate…”

Section: B Energy Removal By Pre-fission Neutronmentioning

confidence: 99%

“…It usually increases moderately up to incident neutron energy around E n = 3 MeV and decreases rapidly from about 4 MeV as the second chance fission occurs [4]. These phenomena were measured actively by the Obninsk group in the past twenty years [5][6][7][8][9]. From a theoretical point of view, Alexander and Krick studied the energy dependence by using a summation calculation about forty years ago [10], in which fission yields were calculated by Wahl's approach [11] and 47 precursors were considered.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental data used for the least square fitting. Nucleus References 233 U Tuttle [16], Borzakov et al [40], Piksaikin et al [8], Cesana et al [41] 235 U Tuttle [16], Reeder et al [42], Saleh et al [43], Roshchenko et al [44], Piksaikin et al [5] 236 U Roshchenko et al [25], Bobkov et al [45] 238 U Tuttle [16], Piksaikin et al [46], Meadows[47] 239 Pu Tuttle[16], Piksaikin et al[8] …”

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confidence: 99%

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Neutron energy dependence of delayed neutron yields and its assessments

Minato

2018

Journal of Nuclear Science and Technology

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Incident neutron energy dependence of delayed neutron yields of uranium and plutonium isotopes is investigated. A summation calculation of decay and fission yield data is employed, and the energy dependence of the latter part is considered in a phenomenological way. Our calculation systematically reproduces the energy dependence of delayed neutron yields by introducing an energy dependence of the most probable charge and the odd-even effect. The calculated fission yields are assessed by comparison with JENDL/FPY-2011, delayed neutron activities, and decay heats. Although the fission yields in this work are optimized to delayed neutron yields, the calculated decay heats are in good agreement with the experimental data. Comparison of the fission yields calculated in this work and JENDL/FPY-2011 gave an important insight for the evaluation of the next JENDL nuclear data.

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Section: Second and Third Chance Fissionmentioning

confidence: 99%

Section: B Energy Removal By Pre-fission Neutronmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Neutron energy dependence of delayed neutron yields and its assessments

Minato

2018

Journal of Nuclear Science and Technology

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“…The number of delayed neutrons per fission d of 233 U was determined on the basis of experimental data. The d value of 0.0067 at the thermal energy was obtained from the experimental data of Borzakov et al, 84) Conant and Palmedo, 85) and Keepin et al 56) In the energy region from 10 keV to 7 MeV, the d value was based on the data of Piksaykin et al, 86) Krick and Evans, 87) and Evans et al 88) As shown in Fig. 8, the present result is largely different from that in JENDL/AC-2008, which was determined by normalizing the data of Krick and Evans to 0.0067 at 0.0253 eV.…”

Section: )mentioning

confidence: 99%

JENDL-4.0: A New Library for Nuclear Science and Engineering

Shibata

Iwamoto

Nakagawa

et al. 2011

J. Nucl. Sci. Technol.

175

152

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The fourth version of the Japanese Evaluated Nuclear Data Library has been produced in cooperation with the Japanese Nuclear Data Committee. In the new library, much emphasis is placed on the improvements of fission product and minor actinoid data. Two nuclear model codes were developed in order to evaluate the cross sections of fission products and minor actinoids. Coupled-channel optical model parameters, which can be applied to wide mass and energy regions, were obtained for nuclear model calculations. Thermal cross sections of actinoids were carefully examined by considering experimental data or by the systematics of neighboring nuclei. Most of the fission cross sections were derived from experimental data. A simultaneous evaluation was performed for the fission cross sections of important uranium and plutonium isotopes above 10 keV. New evaluations were performed for the thirty fissionproduct nuclides that had not been contained in the previous library JENDL-3.3. The data for light elements and structural materials were partly reevaluated. Moreover, covariances were estimated mainly for actinoids. The new library was released as JENDL-4.0, and the data can be retrieved from the Web site of the JAEA Nuclear Data Center.

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Development of a Reference Database for Beta-Delayed Neutron Emission

Dimitriou

Dillmann

Singh

et al. 2021

Nuclear Data Sheets

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Neutron counting per fission ("fiss,n") 5. Neutron and γ counting ("n,γ") 6. Double γ counting ("γ,γ") 7. Ion and neutron counting ("ion,n") 8. Double ion counting ("ion,ion") B. Delayed neutron spectra 1. 3 He spectrometers 2. Gaseous proton recoil spectrometers 3. Neutron energy spectroscopy with time-of-flight spectrometers C. New methods (for P n values and energy spectra) 1. Total absorption γ-ray spectroscopy

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A method and setup for studying the energy dependence of delayed neutron characteristics in nuclear fission induced by neutrons from the T(p, n), D(d, n), and T(d, n) reactions

Cited by 7 publications

References 7 publications

Neutron energy dependence of delayed neutron yields and its assessments

Neutron energy dependence of delayed neutron yields and its assessments

JENDL-4.0: A New Library for Nuclear Science and Engineering

Development of a Reference Database for Beta-Delayed Neutron Emission

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