Satoshi Chiba

Physics-embedded Bayesian neural network to predict energy dependence of fission product yields with fine structures

Jingde Chen, Yuta Mukobara, Kazuki Fujio, Satoshi Chiba et autres

We present a physics-embedded Bayesian neural network (PE-BNN) framework that integrates fission product yields (FPYs) with prior nuclear physics knowledge to predict energy-dependent FPY data with fine structure. By incorporating an energy-independent phenomenological shell factor as a single input feature, the PE-BNN …

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Generation of a Mouse Model of Fuchs Endothelial Corneal Dystrophy by Knock-in of CTG Trinucleotide Repeat Expansion in the TCF4 Gene

Yuki Oyama, Taichi Yuasa, Satoshi Chiba, Tatsuya Nakagawa et autres

Purpose: Fuchs endothelial corneal dystrophy (FECD) is frequently associated with trinucleotide repeat (TNR) expansion in the TCF4 gene intron. The aim of this study was to establish a novel FECD mouse model with TNR expansion. Methods: We used CRISPR/Cas9-mediated genome editing to …

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Surgical Outcomes of Modified Intraperitoneal Onlay Mesh Repair via the Transabdominal Preperitoneal Approach for Inguinal Hernia after Robot-Assisted Radical Prostatectomy

Kenichiro Oda, Hidehito Arimitsu, Shingo Kagawa, Hiroo Yanagibashi et autres

目的：ロボット支援根治的前立腺全摘術（robot-assisted radical prostatectomy；以下，RARPと略記）後の晩期合併症として発生する鼠径ヘルニアの修復法として，経腹的腹膜前到達法（transabdominal preperitoneal approach；以下，TAPPと略記）でのmodified intraperitoneal onlay mesh repair（以下，mIPOMと略記）法の安全性と有用性を検討した．方法：RARP後発症した鼠径ヘルニアに対しTAPP下mIPOM法を施行した15症例20病変を対象とし，手術成績や長期成績を検討した．結果：17病変が間接鼠径ヘルニア，3病変は直接鼠径もしくは併存型ヘルニアであり，両側症例の5症例中1症例で潜在性ヘルニアを認め，術中判断で両側修復を行った．全例術中合併症なく腹腔鏡下に手術を完遂し，術後18か月の観察期間で晩期合併症や再発は認めていない．結語：RARP後鼠径ヘルニアに対するTAPP下mIPOM法は安全に施行可能で，内鼠径輪周囲の解剖を把握し，潜在性鼠径ヘルニアも含め修復できる点で有用である．

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Shell effects and multichance fission in the sub-lead region

F. A. Ivanyuk, Christelle Schmitt, C. Ishizuka, Satoshi Chiba

Within the recently developed five-dimensional Langevin approach for the description of fission of heavy nuclei, we have calculated the fission fragments mass and kinetic energy distributions for the fission of Hg 180 and Hg 190 formed in the reactions Ar 36 + …

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Possibility of Secondary i- and s-processes Following r-process in the Collapsar Jet

Zhenyu He, Toshitaka Kajino, Motohiko Kusakabe, Shan-Gui Zhou et autres

Abstract The slow and intermediate neutron-capture processes, s- and i-processes, are believed to occur in asymptotic giant branch stars to provide half of the heavy atomic nuclei with A ≥ 90. We suggest a possibility that certain types of outflows found in …

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Five-dimensional Langevin approach to fission of atomic nuclei

F. A. Ivanyuk, Chikako Ishizuka, Satoshi Chiba

We have generalized the four-dimensional Langevin approach used in our previous works for the description of the fission process to five dimensions by considering the neck parameter $\ensuremath{\epsilon}$ in the two-center shell model shape parametrization as an independent dynamical variable. The calculated …

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Prompt emission calculations for 239Pu(nth,f) with the DSE model code and a pre-neutron fragment distribution Y(A,TKE) based on the four-dimensional Langevin model

Anabella Tudora, Kazuki Fujio, Chikako Ishizuka, Satoshi Chiba

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Prompt-fission observable and fission yield calculations for actinides by TALYS

Kazuki Fujio, Ali Al-Adili, Fredrik Nordström, Jean-François Lemaître et autres

The nuclear reaction code TALYS adopts the Hauser-Feshbach statistical decay theory, to de-excite fission fragments. This involves for instance the evaporation of prompt fission neutrons and γ-rays. TALYS incorporates databases of primary fission fragment distribution which consists of primary fission fragment yield …

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Fission trajectory analysis using ML techniques

Yuta Mukobara, Satoshi Chiba, Kazuki Fujio, Tatsuya Katabuchi et autres

This research analyzed trajectories of nuclear fission leading to symmetric or assymmetric mass division, obtained by a four-dimensional Langevin-model, using machine learning models. A hybrid neural network, combining Long Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU), both of which were types …

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Mean-field dependence of fragment-production cross sections in heavy-ion induced reactions calculated by antisymmetrized molecular dynamics

Yuta Mukobara, Toshiya Sanami, Akira Ono, Tsunenori Inakura et autres

Dependence of the fragment production cross sections in heavy-ion induced reactions on employed mean-field models was investigated based on antisymmetrized molecular dynamics. For this purpose, five different sets of Skyrme mean-field potentials were employed. We found that there are differences of up …

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Preface to a special issue of journal of nuclear science and Technology on “Nuclear Data and Code Systems as a Basis of Nuclear Technology”

Satoshi Chiba, Hideo Harada, Naohiko Otuka, Go Chiba et autres

It is our great honor to publish a special issue on ‘Nuclear Data and Code Systems as a Basis of Nuclear Technology’ in JNST.Nuclear technology is a special field of science and engineering, where ...

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Reactor antineutrinos and novel application to real-time remote monitoring of nuclear reactors

Chikako Ishizuka, Karen Sasaki, Naoki Yamano, Tadashi Yoshida et autres

We have constructed a computational scheme to obtain energy spectra of reactor antineutrinos, including the inverse β-decay process through which they were to be detected.The antineutrino spectra from all the fission products were calculated based on the gross theory of β-decay.This data …

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