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Nakayama, Shinsuke; Iwamoto, Osamu; Watanabe, Yukinobu*
JAEA-Conf 2017-001, p.91 - 96, 2018/01
Toward evaluation of deuteron nuclear data, we have been developing a code system dedicated for the deuteron-induced reactions, called DEURACS. In the present work, we make an improvement in DEURACS and apply it to composite-particle emission from deuteron-induced reactions. The calculation using DEURACS reproduces the experimental double-differential cross sections of 
, 
, 
, and 
reactions on 
Al and 
Ni at incident energy of 80 MeV quantitatively well. From the results of the analyses, it is shown that the treatment of inelastic scattering and pick-up reaction processes is important in the calculation of deuteron-induced composite-particle emission.
Nakayama, Shinsuke; Kono, Hiroshi*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*
EPJ Web of Conferences, 146, p.12025_1 - 12025_4, 2017/09
Times Cited Count：4 Percentile：90.63(Nuclear Science & Technology)Recently, intensive neutron sources using deuteron accelerator have been proposed for various applications. Accurate and comprehensive deuteron nuclear data library over wide ranges of target mass number and incident energy are indispensable for the design of deuteron accelerator neutron sources. Thus, we have developed an integrated code system dedicated for analysis and prediction of deuteron-induced reactions, which is called DEUteron-induced Reaction Analysis Code System (DEURACS). In the present work, the analysis of 
reactions is extended to higher incident energy up to nearly 100 MeV and also DEURACS is applied to reactions at 80 and 100 MeV. The DEURACS calculations reproduce the experimental double-differential cross sections for the and reactions well.
reactions on berylliumKono, Hiroshi*; Watanabe, Yukinobu*; Nakayama, Shinsuke; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*
JAEA-Conf 2016-004, p.165 - 170, 2016/09
For engineering design of deuteron accelerator neutron sources, accurate nuclear data of deuteron-induced reactions on neutron converter (Li, Be, C, etc.) and accelerator structure material (Fe, Cr, Ni, etc.) are indispensable. Therefore we have developed a computational code system based on physics models dedicated for deuteron nuclear data evaluation. In the present study, we have analyzed the reactions on beryllium at incident deuteron energies up to 65 MeV. Since there is a lot of experimental Thick Target Neutron Yields (TTNYs), double-differential cross sections are calculated by the code system and then are converted to TTNYs. It is found that the calculated TTNYs reproduce the experimental ones fairly well except in the low neutron energy region.
reactions on 
Be and 
C at incident energies up to 50 MeVNakayama, Shinsuke; Kono, Hiroshi*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ogata, Kazuyuki*
Physical Review C, 94(1), p.014618_1 - 014618_9, 2016/07
Times Cited Count：34 Percentile：89.9(Physics, Nuclear)Double-differential thick target neutron yields (TTNYs) from deuteron bombardment on thick Be and C targets are analyzed using the DEURACS (DEUteron-induced Reaction Analysis Code System). The calculated TTNYs reproduced the experimental ones quantitatively well in the incident energy range up to 50 MeV. In addition, it was found that the proton stripping reaction makes the most dominant contribution to neutron production. From the analysis, we conclude that the DEURACS is applicable to reactions and modeling of the stripping reaction is essential to predict neutron production yields accurately.
Kono, Hiroshi*; Watanabe, Yukinobu*; Nakayama, Shinsuke; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*
no journal, ,
For engineering design of deuteron accelerator neutron sources, accurate nuclear data of deuteron-induced reactions on neutron converter (Li, Be, C, etc.) and accelerator structure material (Fe, Cr, Ni, etc.) are indispensable. Therefore we have developed a computational code system based on physics models dedicated for deuteron nuclear data evaluation. In the present study, the code system has been applied to analyses of reactions on beryllium. Applicability of the code system to deuteron-induced neutron production were examined by comparing calculated Thick Target Yield (TTY) with the experimental ones. As the result of analyses, calculation well reproduced the experimental TTY and applicability of the code system to deuteron-induced neutron production were validated.
Kono, Hiroshi*; Watanabe, Yukinobu*; Nakayama, Shinsuke; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*
no journal, ,
In the present study, we have analyzed the reactions on beryllium at incident deuteron energies up to 65 MeV using a computational code system dedicated for deuteron nuclear data evaluation we have developed so far. The calculation results with the present code system reproduced the experimental data better than those of PHITS, which is the Monte Carlo particle transport calculation code, especially in high emission energy range. On the other hand, in the low emission energy range, the present calculation cannot reproduce the experimental data well. Therefore, it is necessary to study the contribution from particle emissions from discrete states using the sequential decay model in order to improve the calculation code system.
Nakayama, Shinsuke; Kono, Hiroshi*; Araki, Shohei*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ye, T.*
no journal, ,
Theoretical model analysis of deuteron-induced activation cross sections were performed using the calculation code system we have developed so far. In our previous works, we analyzed mainly double differential cross sections for the 
and reactions, and activation cross sections from the 
reactions in order to validate calculation method for the direct processes. In the present work, we analyzed activation cross sections from multi particle emission induced by high energy deuteron in order to validate calculation method for statistical decay processes. In the result of analysis, it was found out the calculation method adopted in our code system is valid.
Sadamatsu, Hiroki*; Nakayama, Shinsuke; Watanabe, Yukinobu*; Araki, Shohei*; Iwamoto, Osamu; Ogata, Kazuyuki*
no journal, ,
102-MeV deuteron-induced neutron production reactions on Li, Be, C, Al, Cu, Nb are calculated with DEURACS, which is a code system dedicated to deuteron-induced reactions. The calculation results are compared with the latest experimental data and the applicability of DEURACS to deuteron-induced neutron production reactions at around 100 MeV are investigated. As a result, the calculation using DEURACS reproduced experimental double-differential neutron production cross sections and its applicability to the reactions are validated.
Nakayama, Shinsuke; Furutachi, Naoya; Iwamoto, Osamu; Watanabe, Yukinobu*
no journal, ,
In the ImPACT project, deuteron is a first candidate of incident beam for nuclear transmutation of long-lived fission products (LLFPs) and accurate deuteron nuclear data on LLFPs are strongly required. Thus, we have performed theoretical model analysis of deuteron-induced spallation reactions on LLFP with DEURACS, which is the computational code dedicated for deuteron-induced reactions. Through comparison with measured data and other calculation method, the applicability of DEURACS to spallation reactions and the role of breakup processes in the reactions will be discussed.
