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Ta in the region of the scissors modeAngell, C.; Hajima, Ryoichi; Shizuma, Toshiyuki; Ludewigt, B.*; Quiter, B. J.*
Physical Review Letters, 117(14), p.142501_1 - 142501_5, 2016/09
Times Cited Count：7 Percentile：48.94(Physics, Multidisciplinary)Angell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Ludewigt, B. L.*; Karwowski, H. J.*; Rich, G.*; Silano, J.*
Proceedings of INMM 56th Annual Meeting (Internet), 9 Pages, 2015/07
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
Angell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Ludewigt, B. L.*; Karwowski, H.*; Rich, G.*
Proceedings of INMM 54th Annual Meeting (CD-ROM), 7 Pages, 2013/07
Pu in spent and melted fuelAngell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Bernhard, L.*; Hugon, K.*; Grayson, R.*
no journal, ,
Shizuma, Toshiyuki; Angell, C.; Hajima, Ryoichi; Ludewigt, B.*; Quiter, B. J.*; Koizumi, Mitsuo
no journal, ,
Quasi-monoenergetic laser Compton scattering photon beam was used for a transmission nuclear resonance fluorescence measurement on Ta-181. The experiment was carried out at Duke University. We used photon beams at energies of 2.28 and 2.75 MeV with energy width of about 4% to irradiate absorber and scattering targets of Ta-181 We measured scattered -rays from the scattering target using high-purity Ge detectors. As a result, we found three times more strength than the previously known values. In addition, we observed large branching of 75% at 2.28 MeV and 50% at 2.75 MeV going to excited states from resonances. In this presentation, we will report on the measurement method and the experimental results. We will also talk about the future plan for development of non-destructive assay using mono-energetic laser Compton scattering -ray beam.
Shizuma, Toshiyuki; Angell, C.*; Hajima, Ryoichi; Ludewigt, B.*; Quiter, B. J.*; Koizumi, Mitsuo
no journal, ,
Nuclear resonance transmission -rays through a Pu-239 target were measured, as a part of a development project of nuclear material non-destructive detection and assay using quasi-monoenergetic laser Compton scattering (LCS) photon beams. The experiment was carried out at Duke University. We used photon beams at energies of 2.14 with energy width of about 4% to irradiate absorber and scattering targets of Pu-239. We measured scattered rays from the scattering target using high-purity Ge detectors. As a result, we found the average integration cross section of 13 eV barn at excitation energies from 2.12 to 2.19 MeV. The sum of the branching ratio from the excited state to the ground and first excited states are 0.4. This enables us to quantify Pu-239 in a assembly with an error of approximately 3% in four-hour measurement with 10
photon/s beams. In this presentation, we will report on the measurement method and the experimental results. We will also talk about the future plan for development of non-destructive assay using mono-energetic LCS -ray beam. (This development was carried out under "the subsidiary for promotion of strengthening nuclear security or the like of MEXT".)
