کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10723721 | 1033883 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Competition between excited core states and 1âÏ single-particle excitations at comparable energies in 207Pb from photon scattering
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
The Pb(γâ,γâ²) photon scattering reaction has been studied with the nearly monochromatic, linearly polarized photon beams at the High Intensity γ-ray Source (HIγS) at the DFELL. Azimuthal scattering intensity asymmetries measured with respect to the polarization plane of the beam have been used for the first time to assign both the spin and parity quantum numbers of dipole excited states of 206,207,208Pb at excitation energies in the vicinity of 5.5 MeV. Evidence for dominant particle-core coupling is deduced from these results along with information on excitation energies and electromagnetic transition matrix elements. Implications of the existence of weakly coupled states built on highly excited core states in competition with 1âÏ single particle (hole) excitations at comparable energies are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 681, Issue 2, 26 October 2009, Pages 134-138
Journal: Physics Letters B - Volume 681, Issue 2, 26 October 2009, Pages 134-138
نویسندگان
N. Pietralla, T.C. Li, M. Fritzsche, M.W. Ahmed, T. Ahn, A. Costin, J. Enders, J. Li, S. Müller, P. von Neumann-Cosel, I.V. Pinayev, V.Yu. Ponomarev, D. Savran, A.P. Tonchev, W. Tornow, H.R. Weller, V. Werner, Y.K. Wu, A. Zilges,