Prompt<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi></mml:math>spectroscopic studies of fragment nuclei in thermal neutron induced fission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>235</mml:mn></mml:msup></mml:math>U

Mukhopadhyay, S.; Danu, L. S.; Biswas, D. C.; Goswami, A.; Prashanth, P. N.; Kinage, L.A.; Chatterjee, A.; Choudhury, R. K.

doi:10.1103/physrevc.85.064321

Cited by 81 publications

(12 citation statements)

References 46 publications

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“…The necessary attempt for extracting the relative isotopic yields for the correlated fission fragments for 235 U(n th ,f ) through the prompt γ ray spectroscopic method has not been undertaken prior to the present investigation. The only available isotopic yield data for this fissioning system based on gamma spectroscopy is from the work of Mukhopadhyay et al [13]. The results obtained from this previous investigation were found to be very limited due to the use of a very small array comprising of only two Compton suppressed clover Ge detectors.…”

Section: Introductionmentioning

confidence: 93%

“…Many scientific investigations have already been carried out on the fragment nuclei that are produced in 252 Cf [1][2][3][4][5][6] and 248 Cm spontaneous fissions (SF) [7][8][9][10], neutron induced fission [11][12][13], as well as multiple heavy-and light-ion induced fission reactions [14][15][16][17][18]. However, it is worth noting that the fission products are not the same in each fission reaction.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of relative isotopic yield distribution of even-even fission fragments from $^{235}$U($n_{th}$,$f$) following $γ$ ray spectroscopy

Dey,

Biswas,

Chakraborty

et al. 2021

Preprint

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A detailed investigation on the relative isotopic distributions has been carried out for the first time in case of even-even correlated fission fragments for the 235 U(n th ,f ) fission reaction. Highstatistics data were obtained in a prompt γ ray spectroscopy measurement during the EXILL campaign at ILL, Grenoble, France. The extensive off-line analysis of the coincidence data have been carried out using four different coincidence methods. Combining the results from 2-dimensional γ − γ and 3-dimensional γ − γ − γ coincidence analysis, a comprehensive picture of the relative isotopic yield distributions of the even-even neutron-rich fission fragments has emerged. The experimentally observed results have been substantiated by the theoretical calculations based on a novel approach of isospin conservation, and a reasonable agreement has been obtained. The calculations following the semi-empirical GEF model have also been carried out. The results from the GEF model calculations are found to be in fair agreement with the experimental results.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Measurement of relative isotopic yield distribution of even-even fission fragments from $^{235}$U($n_{th}$,$f$) following $γ$ ray spectroscopy

Dey,

Biswas,

Chakraborty

et al. 2021

Preprint

Self Cite

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“…Gamma-ray spectroscopy has been utilized to infer fission yields for a variety of nuclear reactions [1][2][3][4]. Experimental efforts have spanned prompt γ-ray emission times from within 1 µs or so [5,6] to emissions after β-decays in the days to months range [7,8]. Prompt γ-ray emissions are sensitive to the independent fission product yields (i.e.…”

Section: Introductionmentioning

confidence: 99%

Using CGMF to estimate corrections for fission yields measured via γ-ray spectroscopy

et al. 2020

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Fission product yields have been inferred using γ-ray spectroscopy for several decades. Typically, these efforts have focused on even-Z even-A fission products as their nuclear structure are less complicated. To further simplify the situation, it is often assumed that no side-feeding to the ground-state occurs and multiplicity cuts have a negligible effect on the inferred yields. Using CGMF, a Hauser-Feshbach statistical decay model for the primary fission fragments, we estimate the impact of these assumptions and determine corrections for specific fission product yields. We report on these corrections and investigate their sensitivity to various nuclear parameters, specifically the spin distribution of the fission fragments and the assumed nuclear structure. Our results indicate that even in the simplest of cases, say the 2+ → 0+ transitions in even-Z even-A fragments, average level corrections are on the order of 75%.

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“…• The prompt neutron and gamma emissions from fission fragments [6,7,8], as well as their spin distribution [9,10,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

An improved numerical method to compute neutron/gamma deexcitation cascades starting from a high spin state

Regnier

Litaize

Sérot

2016

Computer Physics Communications

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Numerous nuclear processes involve the deexcitation of a compound nucleus through the emission of several neutrons, gamma-rays and/or conversion electrons. The characteristics of such a deexcitation are commonly derived from a total statistical framework often called "Hauser-Feshbach" method. In this work, we highlight a numerical limitation of this kind of method in the case of the deexcitation of a high spin initial state. To circumvent this issue, an improved technique called the Fluctuating Structure Properties (FSP) method is presented. Two FSP algorithms are derived and benchmarked on the calculation of the total radiative width for a thermal neutron capture on 238 U. We compare the standard method with these FSP algorithms for the prediction of particle multiplicities in the deexcitation of a high spin level of 143 Ba. The gamma multiplicity turns out to be very sensitive to the numerical method. The bias between the two techniques can reach 1.5 γ/cascade. Finally, the uncertainty of these calculations coming from the lack of knowledge on nuclear structure is estimated via the FSP method.

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Promptγspectroscopic studies of fragment nuclei in thermal neutron induced fission of235U

Cited by 81 publications

References 46 publications

Measurement of relative isotopic yield distribution of even-even fission fragments from $^{235}$U($n_{th}$,$f$) following $γ$ ray spectroscopy

Measurement of relative isotopic yield distribution of even-even fission fragments from $^{235}$U($n_{th}$,$f$) following $γ$ ray spectroscopy

Using CGMF to estimate corrections for fission yields measured via γ-ray spectroscopy

An improved numerical method to compute neutron/gamma deexcitation cascades starting from a high spin state

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