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Kosako, Kazuaki*; Murata, Toru*; Iwamoto, Nobuyuki
Nuclear Physics and 
-ray sources for Nuclear Security and Nonproliferation, p.261 - 268, 2014/12
The next version of JENDL Photonuclear data is now being developed by using the photon absorption cross sections based on giant dipole resonances and the nuclear reaction model codes, ALICE-F and CCONE. The incident photon energy covers the range from particle emission threshold to 140 MeV. The data include absorption, particle production yield and nuclide production cross sections, and energy-angle differential cross sections of emitted particles. In the present revision much emphasis is placed on the following topics: (1) Nuclear data of light nuclei from Li to Ca isotopes are systematically evaluated with experimental data. (2) Integral tests of photoneutron yields for Fe, Cu and W performed at Hokkaido University are used to evaluate and verify their nuclide production data. (3) The number of nuclei is increased to 181 in order to take into account the use in many application fields.
-ray nondestructive detection and assay systems for nuclear safeguards and security at JAEAHajima, Ryoichi
Nuclear Physics and -ray sources for Nuclear Security and Nonproliferation, p.25 - 31, 2014/12
-ray generationNishimori, Nobuyuki; Nagai, Ryoji; Matsuba, Shunya; Hajima, Ryoichi; Yamamoto, Masahiro*; Honda, Yosuke*; Miyajima, Tsukasa*; Uchiyama, Takashi*; Kuriki, Masao*
Nuclear Physics and -ray sources for Nuclear Security and Nonproliferation, p.321 - 326, 2014/12
Pu in spent and melted fuel using the nuclear resonance fluorescence integral resonance transmission methodAngell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Ludewigt, B. L.*; Karwowski, H.*; Rich, G.*
Nuclear Physics and -ray sources for Nuclear Security and Nonproliferation, p.133 - 141, 2014/12
Sawamura, Masaru; Nagai, Ryoji; Nishimori, Nobuyuki; Hajima, Ryoichi
no journal, ,
We are proposing non-destructive assay system of nuclear materials with laser Compton scattering combined with an energy-recovery linac and a laser. To construct this system for nuclear safeguards and security purpose, it is important to make the accelerating system small. The spoke cavity has advantages over the elliptical cavity to adopt for our proposing system. We are designing a spoke cavity favorable to compact cavity. Design optimization calculation of the spoke cavity shape is being carried out using 3D electro-magnetic field simulation code with multi-objective genetic algorithm. The results will be presented.
-ray beamShizuma, Toshiyuki; Hayakawa, Takehito; Angell, C.; Hajima, Ryoichi; Minato, Futoshi; Suyama, Kenya; Seya, Michio; Johnson, M.*; McNabb, D.*
no journal, ,
One of the urgent issues for NDA is to establish a reliable technique for the assay of nuclear materials in spent nuclear fuel. The system performance such as counting precision for the NRF-based NDA, would be affected by radiation backgrounds from spent fuel. Generally, the -ray spectrum of radiation backgrounds from spent fuel has characteristic shape with an exponential fall-off as a function of -ray energy. Therefore, the NRF measurement at higher energies is preferable to obtain a better signal-to-noise ratio. The counting precision is also affected by backgrounds from the coherent scattering. In order to minimize the Coherent scattering contribution, we propose a method in which NRF transitions to the first excited state is measured. Assuming various cross sections for NRF in the range of 3 to 100 eV barn at excitation energies of 2 to 5 MeV, we have estimated the statistical uncertainties of the proposed NDA system.
Kondo, Kiminori
no journal, ,
We recently demonstrated the 40 MeV proton acceleration from a micrometer thick metal foils irradiated by 7.5 J, 40 fs, 800 nm laser pulses with the temporal contrast of 10
focused to the intensity of10
W/cm
. This is the highest proton energy obtained with the laser pulses having the energy of 
10 J. The conversion efficiency from laser to protons with the energies more than 15 MeV was achieved to be 0.1%.
Nagai, Ryoji; Hajima, Ryoichi; Kosuge, Atsushi; Mori, Michiaki; Shizuma, Toshiyuki; Nishimori, Nobuyuki; Akagi, Tomoya*; Honda, Yosuke*; Urakawa, Junji*
no journal, ,
A nondestructive assay system of isotopes by quasi-monochromatic -rays and nuclear resonance fluorescence is under development in JAEA. The quasi-monochromatic -rays are generated by laser Compton scattering (LCS) based on energy recovery linac accelerator and laser technologies. In order to demonstrate the accelerator and laser performance required for the -ray source, an LCS experiment is planned at Compact ERL (cERL) at KEK. A mode-locked fiber laser, laser enhancement cavity, beamline, and experimental hatch are under construction for the LCS experiment. Up-to-date construction status is presented in detail.
