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Journal Articles

The Investigations of the $$P$$-wave $$B_s$$ states combining quark model and lattice QCD in the coupled channel framework

Yang, Z.*; Wang, G.-J.*; Wu, J.-J.*; Oka, Makoto; Zhu, S.-L.*

Journal of High Energy Physics (Internet), 2023(1), p.058_1 - 058_19, 2023/01

 Times Cited Count:1 Percentile:76.65(Physics, Particles & Fields)

Combining the quark model, the quark-pair-creation mechanism and $$B^{(*)}bar K$$ interaction, we have investigated the near-threshold $$P$$-wave $$B_s$$ states in the framework of the Hamiltonian effective field theory. With the heavy quark flavor symmetry, all the parameters are determined in the $$D_s$$ sector by fitting the lattice data. The masses of the bottom-strange partners of the $$D^{*}_{s0}(2317)$$ and $$D^{*}_{s1}(2460)$$ are predicted, which are well consistent with the lattice QCD simulation. The two $$P$$-wave $$B_s$$ states are the mixtures of the bare $$bar b s$$ core and $$B^{(*)}bar K$$ component. Moreover, we find a crossing point between the energy levels with and without the interaction Hamiltonian in the finite volume spectrum in the $$0^+$$ case, which corresponds to a CDD (Castillejo-Dalitz-Dyson) zero in the $$T$$-matrix of the $$Bbar K$$ scattering. This CDD zero will help deepen the insights of the near-threshold states and can be examined by future lattice calculation.

Journal Articles

Laser-induced breakdown spectroscopy and related resonance spectroscopy for nuclear fuel cycle management and for decommissioning of "Fukushima Daiichi Nuclear Power Station"

Wakaida, Ikuo; Oba, Hironori; Miyabe, Masabumi; Akaoka, Katsuaki; Oba, Masaki; Tamura, Koji; Saeki, Morihisa

Kogaku, 48(1), p.13 - 20, 2019/01

By Laser Induced Breakdown Spectroscopy and by related resonance spectroscopy, elemental and isotope analysis of Uranium and Plutonium for nuclear fuel materials and in-situ remote analysis under strong radiation condition for melt downed nuclear fuel debris at damaged core in "Fukushima Daiichi Nuclear Power Station", are introduced and performed as one of the application in atomic energy research field.

JAEA Reports

Development of frequency stabilized laser system for long-lived isotope analysis, 1; Development of Littrow configuration extended cavity diode laser

Miyabe, Masabumi; Oda, Koichi*; Oba, Masaki; Kato, Masaaki; Wakaida, Ikuo; Watanabe, Kazuo

JAERI-Tech 2004-064, 33 Pages, 2004/10

JAERI-Tech-2004-064.pdf:1.89MB

In nuclear waste materials there are various radionuclides to which standard analytical techniques are difficult to be applied. We are developing an analytical technique where such nuclides are analyzed using multi-step resonance ionization mass spectrometry. In this study, we have developed an external cavity diode laser applicable to the analysis. The wavelength and output power dependence on injection current and temperature were investigated for various types of laser diodes. Based on the data, we have obtained a suitable condition to operate the ECDL in stable single-mode oscillation, so that a continuous scanning range of about 100 GHz was realized. Additionaly, to evaluate the bandwidth of the developed ECDL, we have performed Doppler-free spectroscopy. The reasonable agreement of the measured isotope shift and HFS splitting with the reported values demonstrated that the developed ECDL is applicable to a precise laser spectroscopy as well as a laser trace analysis.

Journal Articles

EPR studies of 5-bromouracil crystal after irradiation with X rays in the bromine K-edge region

Yokoya, Akinari; Takakura, Kaoru*; Watanabe, Ritsuko; Akamatsu, Ken*; Ito, Takashi*

Radiation Research, 162(4), p.469 - 473, 2004/10

 Times Cited Count:3 Percentile:10.22(Biology)

X-ray absorption spectra from single crystals of 5-Bromouracil were measured with the transmission mode in the energy range from 13.41 to 13.50 keV using the linearly polarized synchrotron radiation (SR). A characteristic resonance structure, consisting of four peaks, was recognized in the spectra in the Br K-edge region. The intensities of these peaks were strongly dependent on the crystal rotation about the normal of the crystal b-c plane, which was set perpendicular to the X-ray beam direction. (SR X-rays are polarized in the horizontal plane.) Molecular orbital calculations indicate that these resonance peaks are associated with the transitions from the 1s electron of Br to the Br-C molecular antibonding orbitals and to a shape resonance. The observed anisotropy of each photoabsorption peak might originate from the angular dependences of these molecular orbitals.

JAEA Reports

SRAC95; General purpose neutronics code system

Okumura, Keisuke; *;

JAERI-Data/Code 96-015, 445 Pages, 1996/03

JAERI-Data-Code-96-015.pdf:12.94MB

no abstracts in English

Journal Articles

$$gamma$$-ray dose intercomparison in the absorbed dose range, 5-50kGy, using dichromate and alanine dosimeters

H.H.Mai*; Ng.D.Duong*; Kojima, Takuji

Applied Radiation and Isotopes, 47(2), p.259 - 261, 1996/00

 Times Cited Count:2 Percentile:24.94(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Evaluation Methods of resonance absorption for system with pellet surrounded by fuel solution

Kugo, Teruhiko; ; *

Journal of Nuclear Science and Technology, 27(9), p.870 - 874, 1990/09

no abstracts in English

JAEA Reports

Revised SRAC code system

; ; *; *

JAERI 1302, 281 Pages, 1986/09

JAERI-1302.pdf:8.78MB

no abstracts in English

Journal Articles

Double heterogeneity effect on the resonance absorption in the very high temperature gas-cooled reactor

; ; *

Journal of Nuclear Science and Technology, 22(1), p.16 - 27, 1985/00

 Times Cited Count:11 Percentile:76.64(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Journal Articles

Intermediate neutron resonance absorption in heterogeneous systems

;

Nuclear Science and Engineering, 31, p.388 - 395, 1968/00

 Times Cited Count:11

no abstracts in English

Journal Articles

Exact treatment of the resonance absorption of neutrons of intermediate energy

Nuclear Science and Engineering, 32, p.423 - 426, 1968/00

no abstracts in English

Journal Articles

Effect of resonance scattering of sodium on resonance absorption of $$^{2}$$$$^{3}$$$$^{8}$$U

Tone, Tatsuzo; ;

Journal of Nuclear Science and Technology, 4(12), p.601 - 606, 1967/00

 Times Cited Count:2

no abstracts in English

Journal Articles

Temperature dependence of nuclear resonance absorption line width in $$^{1}$$$$^{6}$$$$^{1}$$Dy

P.K.Tseng*; ; ;

Journal of the Physical Society of Japan, 16(9), p.1790 - 1790, 1961/00

 Times Cited Count:1

no abstracts in English

Oral presentation

Challenging in laser based spectroscopy for nuclear engineering

Wakaida, Ikuo; Oba, Hironori; Akaoka, Katsuaki; Miyabe, Masabumi; Oba, Masaki; Ito, Chikara; Saeki, Morihisa; Kato, Masaaki

no journal, , 

In nuclear engineering, especially for the decommissioning of severe accident atomic power plant, development of quick, easy, non-contact, no-preparation, direct, remote, onsite and in-situ analysis of nuclear fuel materials which has very complex and large amount of optical emission lines will be indispensable. In these R&D, it may be important how we realize high sensitivity and high resolution spectroscopy and perform the identification of the specific element among a large number of emission spectra. Various kind of technique, such as Double-pulse LIBS and Microwave assisted LIBS for multiply the emission intensity, high resolution LIBS by ultra-high resolution spectrometer or Laser Ablation Resonance Absorption Spectroscopy for isotope analysis, Ultra-thin Liquid flow LIBS for liquid phase application and LIBS based on radiation resistant optical fiber for onsite/in-situ monitoring of melt downed nuclear fuel debris, will have been under investigation. Japan Atomic Energy Agency has opened the new research center "Collaborative Laboratories for Advanced Decommissioning Science", and laser based spectroscopy will be restarted as one of the basic projects.

Oral presentation

Status of resonance absorption imaging in RADEN, J-PARC

Kai, Tetsuya; Matsumoto, Yoshihiro*; Parker, J. D.*; Segawa, Mariko; Shinohara, Takenao; Hiroi, Kosuke; Su, Y.; Zhang, S.*; Hayashida, Hirotoshi*; Oikawa, Kenichi; et al.

no journal, , 

Oral presentation

Laser remote analysis for MOX fuel and its application for rapid and in-situ analysis in decommissioning of "Fukushima Daiichi" Nuclear Power Station

Wakaida, Ikuo; Akaoka, Katsuaki; Miyabe, Masabumi; Oba, Hironori; Saeki, Morihisa; Oba, Masaki; Ito, Chikara; Kato, Masaaki

no journal, , 

Laser Induced Breakdown Spectroscopy (LIBS) for elemental analysis and Laser Ablation Resonance Absorption Spectroscopy (LARAS) for isotope analysis have been developed as an analytical technique for Low-decontaminated MOX fuel with fissionable Miner Actinide elements (MA) and as for one of the diagnostic tool of nuclear fuel debris and polluted materials in the decommissioning of the severe accident nuclear power station. Specialized glove box with auto and remote arraignment system for LIBS and LARAS was constructed, and the detection limit of Pu in MOX to be several 1000 ppm and some hyper fine structures of $$^{239}$$Pu were demonstrated. For the diagnostic tool in the decommissioning of damaged core, optical fiber based portable LIBS probe made by radiation resistant optical fiber is under construction, and just now, some specific spectra from the simulated sample of molten debris made by sintered oxide of Zr and U is successfully observed under water condition or strong radiation field.

Oral presentation

Research and development on laser remote analysis for on-site, in-situ surveillance of nuclear debris in decommissioning of Fukushima Daiichi Nuclear Power Station

Wakaida, Ikuo; Oba, Hironori; Miyabe, Masabumi; Akaoka, Katsuaki; Tamura, Koji; Saeki, Morihisa; Oba, Masaki; Shibata, Takuya; Ikeda, Yuji*; Sakka, Tetsuo*; et al.

no journal, , 

19 (Records 1-19 displayed on this page)
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