教授　Mark B. Greenfield

最近の研究活動

  1. Analysis of charge exchange data at the Kernfysisch Versneller Instituut (KVI), Groningen, The Netherlands.

  2. Continuation of analysis of various (p,n) and polarized (p,n) reactions at the Research Center for Nuclear Physics, University of Osaka.

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研究論文

  1. Wakasa, T., Sakai, H., Okamura, H., Otsu, H., Ishida, S., Sakamoto, N., Uesaka, T., Satou, Y., Greenfield, M. B., Koori, N., Okihana, A. and Hatanaka, K.: Spin-flip strength in the continuum and effective tensor interactions via polarization Dnn(00) for (p,n) reactions at 295 MeV, Physical Review, c51, R2871-R2875 (1995). Polarized protons may be used to measure the amount of spin flip and tensor interaction at intermediate energy.

  2. Sakai, H., Okamura, H., Otsu, H., Wakasa, T., Fujita, S., Sakamoto, N., Uesaka, T., Satou, Y., Nonaka, T., Oonishi, T., Ishida, S., Greenfield, M. B. and Hatanaka, K.: Spin-isospin excitations studied by polarized beams, Nuclear Physics, A599, 197c-210c (1996).
    Excited spin-isospin flip excitations can be studied by polarized particle beams.

  3. Wakasa, T., Sakai, H., Okamura, H., Otsu, H., Sakamoto, N., Uesaka, T., Satou, Y., Fujita, S., Ishida, S., Greenfield, M. B., Koori, N., Okihana, A. and Hatanaka, K.: Multipole decomposition of the 27Al, 90Zr, 208Pb(p,n) reactions at 295 MeV, Nuclear Physics, A599, 217c-222c (1996).
    The different multipoles throughout the high-energy region of the spectrum can be separated via a careful analysis of the (p,n) reaction.

  4. Fujiwara, M., Akimune, H., Daito, I., Ejiri, H., Fujita, Y., Greenfield, M.B., Harakeh, M.N., Inomata, T., Janecke, J., Nakayama, S., Takemura, N., Tamii, A., Tanaka, M., Toyokawa, H. and Yosoi, M.: Spin-isospin resonances in nuclei, Nuclear Physics, A599, 223c-244c (1996).
    The resonances which involve both spin and isospin flip in nuclei are measured and discussed.

  5. Akimune, H., Daito, I., Fujita, Y., Fujiwara, M., Greenfield, M. B., Tanaka, M. and Yosoi, Y.: Direct proton decay from the Gamow-Teller resonance in 208Bi, Physical Review, C52, 604-605 (1995).
    The Gamow-Teller resonance involves both spin and isospin flip of one unit. Protons which follow the excitation of this resonance are directly detected.

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研究発表

  1. Harakeh, M. N., Akimune, H., Daito, I., Fujita, Y., Fujiwara, M., Greenfield, M. B., Inomata, T., Janecke, J., Katori, K., Nakayama, S., Sakai, H., Sakemi, Y., Tanaka, M. and Yosoi, M.: Microscopic structure of spin-isospin modes in 208Bi, Proceedings of the International Conference on Selected Topics in Nuclear Structure, Dubna, Russia, 21 (1994). The structure of excitations involving the transfer of units of spin and isospin in a heavy nucleus is discussed.

  2. Fujiwara, M., Akimune, H., Daito, I., Fujita, Y., Greenfield, M. B., Harakeh, M. N., Hazama, R., Inomata, T., Janecke, J., Kudomi, N., Kume, K., Nakayama, S., Shinmyo, K., Tamii, A., Tanaka, M., Toyokawa, H. and Yosoi, M.: Nuclear spin-isospin response and weak processes, Proceedings of the IV International Symposium on Weak and Electromagnetic Interactions in Nuclei, World Scientific, Singapore, 289 (1995).
    In nuclei both the spin and isospin are related indirectly to weak processes.

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