Erratum: 
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-matrix analysis and prediction of low-energy neutron-induced fission cross sections for a range of Pu isotopes [Phys. Rev. C 
<b>88</b>
, 054612 (2013)]

Bouland, O.; Lynn, J. E.; Talou, P.

doi:10.1103/physrevc.101.039901

Cited by 9 publications

(66 citation statements)

References 6 publications

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“…In the spirit of the extended R-matrix MC simulations made according to the low-energy neutron-induced fission cross sections for the isotopes of the Pu family [1], a counterpart of the analytical Eq. (2) was programmed in the AVXSF -LNG (AVerage CROSS Section Fission -Lynn and Next Generation) code to be able to calculate both neutron-induced cross sections and surrogatereaction probabilities with an unique set of input nuclear structure parameters.…”

Section: In-house Monte Carlo Reaction Decay Probabilities Algorithmmentioning

confidence: 99%

“…In a previous paper [1], we have enlightened the actual possibility to carry one-dimensional fission barrier extended R-matrix simulations accurate enough to make predictions of low-energy neutron-induced fission cross sections for the isotopes of the Pu family for which no neutron spectroscopy measurements exist. This has been accomplished thanks to Monte Carlo (MC) samplings of both first and second well resonance parameters (reaction widths and energies) of the actinide double-humped fission barrier and to model input parameters in part obtained from macroscopic-microscopic nuclear structure calculations [11].…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Bouland

2020

EPJ Web Conf.

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This paper comes back on the accuracy of the surrogate-reaction method (SRM) historically used for neutron-induced average partial cross sections inference from measured surrogate-reaction probabilities. The SRM level of performance is examined in relation to a reasonably accurate reference calculation performed with the 𝒜𝒱𝒳𝒮ℱ-ℒ𝒩𝒢 code [1] through a challenging test case : the 240Pu* compound system. This paper argues on some ingredients of the reference calculation [2] and returns some hints about the failure now well-known of the neutron-induced γ average cross section inference. It shows also that in some special cases, the SRM can be poorly accurate also in terms of neutron-induced fission average cross section inference.

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Section: In-house Monte Carlo Reaction Decay Probabilities Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Bouland

2020

EPJ Web Conf.

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“…The development and motives for using the QPVR level density model, particularly in the context of fission, are given in Ref. [31]. The energies of the resulting states are calculated by simply summing the energies and axial spin projections of the quasi-particle, vibrational and rotational components.…”

Section: B Compound Nucleus Level Densitymentioning

confidence: 99%

“…The model used by Bouland et al [31] is summarized here. For E1 transitions our γ-ray strength function is the sum of a valence term and a Brink giant resonance form with energy-dependent damping width similar to that adopted by Kopecky and Uhl [33]:…”

Section: Expressions For Radiation Widthsmentioning

confidence: 99%

“…(1) are calculated in the R-matrix model for fission as described in [35]. This formalism was recently applied successfully across a suite of plutonium isotopes [31]. This model is particularly suited to the description of low-energy nuclear fission when the excitation energy of the compound nucleus is near or below the fission barrier.…”

Section: Fission Probabilitiesmentioning

confidence: 99%

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Reexamining the role of the ( n,γf ) process in the low-energy fission of U235 and
Lynn
¹
,
Talou²,
Bouland³
2018
Phys. Rev. C
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The (n, γf ) process is reviewed in light of modern nuclear reaction calculations in both slow and fast neutron-induced fission reactions on 235 U and 239 Pu. Observed fluctuations of the average prompt fission neutron multiplicity and average total γ-ray energy below 100 eV incident neutron energy are interpreted in this framework. The surprisingly large contribution of the M1 transitions to the pre-fission γ-ray spectrum of 239 Pu is explained by the dominant fission probabilities of 0 + and 2 + transition states, which can only be accessed from compound nucleus states formed by the interaction of s-wave neutrons with the target nucleus in its ground state, and decaying through M1 transitions. The impact of an additional low-lying M1 scissors mode in the photon strength function is analyzed. We review experimental evidence for fission fragment mass and kinetic energy fluctuations in the resonance region and their importance in the interpretation of experimental data on prompt neutron data in this region. Finally, calculations are extended to the fast energy range where (n, γf ) corrections can account for up to 3% of the total fission cross section and about 20% of the capture cross section. PACS numbers: 24.75.+i, 25.85.Ec, 23.20.Lv 236 U * 3 − 0.87 ± 0.89 [10] 180 ± 18 [9] 4.7 ± 2.3 [13] 3.0 [2] 38.1 ± 1.7 [11] 4 − 0.32 ± 0.13 [10] 91 ± 11 [9] ≤ 1.2 1.5 [2] 2.1 ± 0.7 [13] 240 Pu * 0 + 2.8 ± 9.2 [10] 2270 [12] 7.3 ± 1.8 [13] 4 − 7 [2] 5.73 [5] 43.0 ± 4.0 [11] 1 + 1.91 ± 0.81 [10] 33.7 ± 5 [12] 3.0 [2] 2.76 [5] 4.1 ± 0.9 [6] 4.2 ± 0.4 [13]

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Testing the Extended SRM against the ²³⁸U(³He,⁴He)²³⁷U* surrogate probabilities

2023

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Since its introduction in the seventies’, the so-called surrogate-reaction method (SRM) has motivated the development and improvement of theories in connection to direct reactions. A recent work by Bouland and Noguère, Phys. Rev. C 102, 054608 (2020), has shown that the inclusion of experimental probabilities in the neutron cross section evaluation process can be better achieved using tools resulting from the efforts made over the two last decades. In particular, the authors have put forward a new prescription, named after the SRM as extended SRM (ESRM), to convert, with reasonable confidence, probabilities measured in direct reactions to pseudo-experimental neutron-induced reaction cross sections. Applied to the 174Yb(3He,py)176Lu* transfer reaction, the ESRM has demonstrated much more precision than the early use of the SRM. In addition to the ‘direct’ analysis of reaction probabilities measured in direct reactions using the right modeling as developed in Phys. Rev. C 100, 064611 (2019), it is worth to try converting the measured probabilities in pseudo experimental neutron-induced cross sections for neutron reactor data applications. In the present paper, first results, before conversion, are shown by applying the two ESRM equations to a fissile isotope.

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Erratum: R -matrix analysis and prediction of low-energy neutron-induced fission cross sections for a range of Pu isotopes [Phys. Rev. C 88 , 054612 (2013)]

Cited by 9 publications

References 6 publications

Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Reexamining the role of the ( n,γf ) process in the low-energy fission of U235 and
Lynn
¹
,
Talou²,
Bouland³
2018
Phys. Rev. C
Self Cite

Testing the Extended SRM against the ²³⁸U(³He,⁴He)²³⁷U* surrogate probabilities

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Erratum: R -matrix analysis and prediction of low-energy neutron-induced fission cross sections for a range of Pu isotopes [Phys. Rev. C 88 , 054612 (2013)]

Cited by 9 publications

References 6 publications

Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Monte Carlo simulation of γ and fission transfer reactions using extended ℛ-matrix theory

Reexamining the role of the ( n,γf ) process in the low-energy fission of U235 and Lynn1, Talou2, Bouland3 2018Phys. Rev. CSelf Cite

Testing the Extended SRM against the 238U(3He,4He)237U* surrogate probabilities

Contact Info

Product

Resources

About

Reexamining the role of the ( n,γf ) process in the low-energy fission of U235 and
Lynn
¹
,
Talou²,
Bouland³
2018
Phys. Rev. C
Self Cite

Testing the Extended SRM against the ²³⁸U(³He,⁴He)²³⁷U* surrogate probabilities