Resonance Parameters and Uncertainties Derived from Epithermal Neutron Capture and Transmission Measurements of Natural Molybdenum

Leinweber, G.; Barry, D. P.; Burke, J.A.; Drindak, N. J.; Danon, Y.; Block, Robert C.; Francis, N.C.; Moretti, B. E.

doi:10.13182/nse08-76

Cited by 18 publications

(5 citation statements)

References 11 publications

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“…The average radiative width γ was not varied since it is well known from the resolved resonance region. Past elemental molybdenum transmission measurements at RPI reported the s-wave strength function for 95 Mo that is in good agreement with the current evaluation [1]. The s-wave strength function is also expected to have a smaller contribution since at around A = 90-100 there is a minimum in the s-wave strength function and a peak (ten times stronger) in the p-wave strength function based on the optical model [5].…”

Section: B Average Parameterssupporting

confidence: 83%

“…The transmission of neutrons through the material is denoted as T i and is defined as the ratio of background corrected count rate in counts per second with the sample material in the beam to the background corrected rate in the open beam in TOF channel i, is the time-dependent background count rate [1]. Transmission data reduction was performed using the internal processing codes RPIXDR, MONCHK, BACK, FIT, and TRANS.…”

Section: A Data Reduction To Cross Sectionmentioning

confidence: 99%

“…It also describes a new evaluation of a 95 Mo total cross section in the unresolved resonance range. Isotopic molybdenum total neutron crosssection data in particular are important because molybdenum can exist in nuclear reactors as a high yield fission product or in alloyed form with applications in reactor piping, fuel cladding, and most importantly in advanced nuclear fuel in the form of U-Mo [1][2][3]. U-Mo alloys are mechanically stable, possess high thermal conductivity, are corrosion resistant in a high-temperature water environment (more so than unalloyed uranium), and are highly durable under high levels of irradiation [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Isotopic molybdenum total neutron cross section in the unresolved resonance region

et al. 2015

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Accurate isotopic molybdenum nuclear data are important because molybdenum can exist in nuclear reactor components including fuel, cladding, or as a high yield fission product. High-resolution time-of-flight neutron transmission measurements on highly enriched isotopic metallic samples of 95 Mo, 96 Mo, 98 Mo, and 100 Mo were performed in the resonance energy range from 1 to 620 keV. The measurements were taken with the newly developed modular 6 Li-glass transmission detector positioned at the 100-m experimental flight station. In the unresolved energy region (URR), new comprehensive methods of analysis were developed and validated in order to obtain accurate neutron total cross-section data from the measurement by correcting for background and transmission enhancement effects. Average parameters and fits to the total cross section for 95 Mo were obtained using the Hauser-Feshbach statistical model code FITACS, which is currently incorporated into the SAMMY code. The fits to the experimental data deviate from the current evaluated nuclear data file/B-VII.1 isotopic Mo evaluations by several percent in the URR.

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Section: B Average Parameterssupporting

confidence: 83%

Section: A Data Reduction To Cross Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isotopic molybdenum total neutron cross section in the unresolved resonance region

et al. 2015

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“…One may note the neutron energies for this comparison, which are quite different from the usual value of 10 keV. These energies are taken from the earlier RIPL-1 compilation [24] except the case of more recent measurements [26,[36][37][38]. Nevertheless, these changes have no importance for the σ T (E) values around 1 MeV, which are of obvious importance for the competition between the neutron and chargedparticle decay of excited CN, in heavier Mo nuclei.…”

Section: A Compound and Pre-equilibrium Emissionmentioning

confidence: 99%

“…Comparison of experimental[22,26,[36][37][38] and calculated s-and p-wave neutron strength functions S0 and S1, respectively, and the potential scattering radius R ′ [22] of93 Nb and92,[94][95][96][97][98]100 Mo isotopes, and the changes of either local or global real-potential depth v1 of the even and odd Mo isotopes[33], respectively (with the use of[33] notations, the energies are in MeV and geometry parameters in fm) which provide the best results within the SPRT method.…”

mentioning

confidence: 99%

Optical potential for incident and emitted low-energy $α$ particles. III. Non-statistical processes induced by neutrons on Zr, Nb, and Mo nuclei

Avrigeanu¹,

Avrigeanu²

2023

Preprint

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Background: The reliability of a previous α-particle optical-model potential (OMP) on nuclei with mass number 45≤A≤209 was proved for emitted α particles as well, for proton-induced reactions on Zn isotopes [Phys. Rev. C 91, 064611 (2015), Paper I]. However, the same was not the case of neutrons on Zr stable isotopes [Phys. Rev. C 96, 044610 (2017), Paper II].Purpose: A recent assessment of this potential also for nucleon-induced α-emission on A∼60 nuclei, including pickup direct reaction and eventual Giant Quadrupole Resonance (GQR) α-emission, is completed for neutrons incident on Zr, Nb, and Mo stable isotopes. Methods: Consistent sets of input parameters, determined through analysis of independent data, is involved while no further empirical rescaling factors of the γ and nucleon widths have been involved.Results: A suitable account of all competitive reaction channels is confirmed by careful uncertainty analysis, to avoid parameter ambiguities and/or error compensation. Additional validation of this potential is also supported by recently measured (α, γ) and (α, n) cross-sections of Zr and Mo nuclei.Conclusions: An increase of the α-emission beyond the statistical predictions, through consideration of additional reaction channels of the pickup direct interaction and like-GQR decay, makes possible the description of both absorption and emission of α particles by the same optical potential.

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Neutron Resonance Parameters for Mo-92 (Molybdenum)

Sukhoruchkin¹,

Soroko²

2015

Supplement to Volume I/24

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Resonance Parameters and Uncertainties Derived from Epithermal Neutron Capture and Transmission Measurements of Natural Molybdenum

Cited by 18 publications

References 11 publications

Isotopic molybdenum total neutron cross section in the unresolved resonance region

Isotopic molybdenum total neutron cross section in the unresolved resonance region

Optical potential for incident and emitted low-energy $α$ particles. III. Non-statistical processes induced by neutrons on Zr, Nb, and Mo nuclei

Neutron Resonance Parameters for Mo-92 (Molybdenum)

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