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Our research interests include:

(1) Research on The History of Star Formation by The Observation of Supernova Relic Neutrinos
  • Search for Neutrinos From Supernova Explosion by SuperKamiokande and EGADS Detectors
  • Studay of Gamma-Rays from Thermal Neutron Capture on Gadolinium at JPARC-MLF
(2) Study of Neutrino- and Electron-Nulceus Interactions for the Detection of Neutrinos from Supernova Explosion
  • Measurement of Gamma-rays from Giant Resonance of Oxygen and Carbon
  • Development of Neutrino-Oxygen and -Carbon Reactions in The 10-1000MeV Region
(3)The ANNRI-Gd model
  • Abstract:
    This website provides C++ source code and necessary input data files to simulate the gamma ray energy spectrum of the radiative thermal neutron capture on gadolinium-157 (157Gd) according to the “ANNRI-Gd model“. The model was developed on the basis of data that were taken with an enriched 157Gd sample placed inside a neutron beam at the Material and Life Science Experimental Facility (MLF) of J-PARC. The resulting gamma rays from thermal neutron captures were detected with the germanium crystal arrays of the ANNRI detector.
    Using the provided data files, the source code generates the energies and directions of gamma rays from the deexcitation of 158Gd after the thermal neutron capture on 157Gd. All generated directions are totally random, i.e., without angular correlations. The ANNRI-Gd model bases on separate descriptions for the continuum component and the discrete peaks in the gamma ray energy spectrum; they are finally combined to form the total spectrum.
    The strength of the most discrete peaks in the model is tuned to match the measured data. For the continuum component, the model employs a statistical description based on a nuclear level density from the Hartree-Fock-Boguliubov method and an electric dipole (E1) photon strength function, which follows the Standard Lorentzian (SLO) model. Details on the ANNRI-Gd and its performance compared to the measured data can be found in our publicati on arXiv: XXXX.XXXXX.
    Both the source code and the input data files are open for general used in any research, provided that our paper is reference in your publication.
  • User‘s Guide (read me first): [Link to PDF file]
  • C++ source code: [Link to ZIP archive containing the source code]
  • Input data files: [Link to ZIP archive containing the input data files]
  • Contancts:
    • Makoto Sakuda
      Department of Physics, Faculty of Science, Okayama University, 3-1-1 Tsushima-naka , Kita-ku , Okayama-shi, 700-8530 Japan
    • Sebastian Lorenz
      Institut fuer Physik, Johannes Gutenberg-Universitaet Mainz Staudingerweg 7, 55128 Mainz, Germany