کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9861013 | 1528978 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Changes in νg9/2 shape polarisation across the odd neutron-rich Cr isotopes
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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
Excited states in 57Cr have been populated to high spin in the C14(Ca48,αn) reaction at a beam energy of 130 MeV. A regular sequence of stretched quadrupole transitions has been established above the yrast 9/2+ level. This sequence is interpreted as a rotational band associated with prolate deformation induced by the excitation of the odd neutron into the 1/2+[440] orbital. Total Routhian surface calculations, which follow this configuration to high spin, reproduce the observed features of the band. They are also able to account for a similar, but less well developed structure in 55Cr. In contrast, the isomeric yrast 9/2+ state in 59Cr appears to be a band-head state dominated by the 9/2+[404] configuration, which is favoured at oblate deformations. Such a marked difference presents a significant challenge for theoretical descriptions, but is consistent with features exhibited by the low-lying negative-parity states in 59Cr.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 622, Issues 1â2, 25 August 2005, Pages 151-158
Journal: Physics Letters B - Volume 622, Issues 1â2, 25 August 2005, Pages 151-158
نویسندگان
A.N. Deacon, S.J. Freeman, R.V.F. Janssens, F.R. Xu, M.P. Carpenter, I.R. Calderin, P. Chowdhury, N.J. Hammond, T. Lauritsen, C.J. Lister, D. Seweryniak, J.F. Smith, S.L. Tabor, B.J. Varley, S. Zhu,