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Iwamoto, Hiroki; Meigo, Shinichiro
Journal of Nuclear Science and Technology, 57(3), p.276 - 290, 2020/03
Times Cited Count：2 Percentile：23.63(Nuclear Science & Technology)This paper presents an approach to uncertainty estimation of spallation particle multiplicity of lead (
Pb), primarily focusing on proton-induced spallation neutron multiplicity (
) and its propagation to a neutron energy spectrum. The uncertainty is estimated from experimental proton-induced neutron-production double-differential cross sections (DDXs) and model calculations with the Particle and Heavy Ion Transport code System (PHITS). Uncertainties in multiplicities for 
, 
, and 
reactions are then inferred from the estimated uncertainty and the PHITS calculation. Using these uncertainties, uncertainty in a neutron energy spectrum produced from a thick Pb target bombarded with 500 MeV proton beams, measured in a previous experiment, is quantified by a random sampling technique, and propagation to the neutron energy spectrum is examined. Relatively large uncertainty intervals (UIs) were observed outside the lower limit of the measurement range, which is prominent in the backward directions. Our findings suggest that a reliable assessment of spallation neutron energy spectra requires systematic DDX experiments for detector angles and incident energies below 100 MeV as well as neutron energy spectrum measurements at lower energies below 
1.4 MeV with an accuracy below the quantified UIs.
Li(p,xn) reaction for incident energies up to 200 MeVMatsumoto, Yuiki*; Watanabe, Yukinobu*; Kunieda, Satoshi; Iwamoto, Osamu
JAEA-Conf 2015-003, p.191 - 196, 2016/03
Neutron emission from the Li(p,n)Be reaction can be divided into two components: a mono-energetic component for the transition to the ground and the 1st excited states and a continuum component formed by Li breakup processes. For the former, we have obtained the differential cross sections by interpolation based on Legendre fitting of available experimental data up to 45 MeV and apply DWBA calculations above 45 MeV. Next, we have applied the CCONE code to DDX calculations of the continuum component, and adjusted pre-equilibrium model parameters to reproduce experimental data well. Finally, both the results are merged and then the evaluated DDX data are completed.
Kondo, Keitaro; Takagi, Satoshi*; Murata, Isao*; Miyamaru, Hiroyuki*; Takahashi, Akito*; Kubota, Naoyoshi; Ochiai, Kentaro; Nishitani, Takeo
Fusion Engineering and Design, 81(8-14), p.1527 - 1533, 2006/02
Times Cited Count：14 Percentile：68.04(Nuclear Science & Technology)In a fusion reactor development, double-differential charged-particle emission cross sections(DDXc) are necessary to estimate nuclear heating and material damages of candidate materials irradiated with neutrons. Especially in light nuclei such as Be, Li, and C, nuclear reactions are complicated and difficult to estimate energy spectra of emitted particles based only on theoretical calculations Therefore development of a new technique for precise measurements of DDXc is quite important. Recently we successfully developed a new spectrometer for measurement of DDXc using a pencil-beam DT neutron source of FNS in JAERI. In the present study we carried out measurements of DDXc of 
Be, 
C, 
F, and 
Al using the spectrometer. The present technique was valid from the result of measurement for the Al(n,x
) reactions. Slight differences appeared between measured data and evaluation or previous experimental values for Be(n,x) reactions at backward scattering angle and in lower energy region.
Li at 10 to 20MeV region*; *; Matsuyama, Shigeo*; Chiba, Satoshi; *; Shibata, Keiichi; Iwamoto, Osamu; A.J.Koning*; G.M.Hale*; M.B.Chadwick*
JAERI-Research 98-032, 28 Pages, 1998/06
JAERI-Research-98-032.pdf:1.31MB
no abstracts in English
*; Watanabe, Yukinobu*; *; *; *; *; *; Nakamura, Hiroyuki*; *; *
JAERI-M 94-011, 56 Pages, 1994/02
no abstracts in English
Suzuki, Tomoo; ; Tanaka, Shunichi;
JAERI 1327, 110 Pages, 1992/05
no abstracts in English
Fukahori, Tokio; Chiba, Satoshi; Asami, Tetsuo*
JAERI-M 92-053, 205 Pages, 1992/04
no abstracts in English
Takahashi, Akito*; Sugimoto, Hisashi*; *; *; *; Maekawa, Fujio*
JAERI-M 90-220, 40 Pages, 1990/12
no abstracts in English
Nakakawa, Masayuki; Mori, Takamasa; *
JAERI-M 90-097, 95 Pages, 1990/06
no abstracts in English
Mori, Takamasa; Nakakawa, Masayuki; *
JAERI 1314, 151 Pages, 1988/11
no abstracts in English
Bi, 
B and 
BTakahashi, Akito*; Sasaki, Yasuhiro*; Sugimoto, Hisashi*
JAERI-M 88-102, 48 Pages, 1988/06
no abstracts in English
Mori, Takamasa; *; Nakakawa, Masayuki
JAERI-M 87-123, 55 Pages, 1987/08
no abstracts in English
Au(
,xn) reactionTran, T. K.*; Sanami, Toshiya*; Yamazaki, Hirohito*; Itoga, Toshiro*; Sakaki, Yasuhito*; Nguyen, L. T. T.*; Kirihara, Yoichi; Nakashima, Hiroshi*; Miyamoto, Shuji*; Asano, Yoshihiro*
no journal, ,
no abstracts in English
