کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10726447 1035927 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Giant resonances - experiments at highest resolution, wavelets and scales
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Giant resonances - experiments at highest resolution, wavelets and scales
چکیده انگلیسی
Recent high-resolution experiments using electron and proton scattering and charge-exchange reactions covering a wide mass range of nuclei establish the fine structure of giant resonances as a global phenomenon. Experimental evidence includes a systematic study of the isoscalar giant quadrupole resonance (ISGQR) in 58Ni, 89Y, 90Zr, 120Sn and 208Pb, the first observation of fine structure of the Gamow-Teller resonance in a heavy nucleus, 90Nb, as well as of the isovector giant dipole (IVGDR) and magnetic quadrupole (M2) modes. Novel methods based on wavelet transforms are introduced for the extraction of scales characterizing the fine structure and evaluating their relative importance. Comparison of those scales to predictions from microscopic model calculations including 2p-2h degrees of freedom indicate surface vibration coupling as the underlying mechanism for their appearance. A generic pattern is also found for the stochastic coupling to the background of the more complex states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Particle and Nuclear Physics - Volume 55, Issue 1, July 2005, Pages 387-396
نویسندگان
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