Blocking of coupling to the 0<Subscript>2</Subscript><Superscript>+</Superscript> excitation in <Superscript>154</Superscript>Gd by the [505]11/2<Superscript>-</Superscript> neutron in <Superscript>155</Superscript>Gd期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Blocking of coupling to the 02+ excitation in 154Gd by the [505]11/2- neutron in 155Gd

Authors:	J. F. Sharpey-Schafer T. E. Madiba S. P. Bvumbi E. A. Lawrie J. J. Lawrie A. Minkova S. M. Mullins P. Papka D. G. Roux J. Timár

Affiliation:	1.University of Western Cape,Department of Physics,Bellville,South Africa;2.University of Zululand,Department of Physics,Kwa Dlangezwa,South Africa;3.iThemba Laboratory for Accelerator Based Sciences,Somerset-West,South Africa;4.Faculty of Physics,St. Kliment Ohridski University of Sofia,Sofia,Bulgaria;5.University of Stellenbosch,Department of Physics,Stellenbosch,South Africa;6.ATOMKI,Debrecen,Hungary

Abstract:	The concept that the first excited 0⁺ states in N = 90 nuclei are not a b beta -vibration but a second vacuum formed by the combination of the quadrupole pairing force and the low density of oblate orbitals near the Fermi surface is supported by the blocking of this collective mode in ¹⁵⁴Gd from coupling to the [505]11/2^- single-particle quasi-neutron orbital in ¹⁵⁵Gd . The coupling of this orbital to the 2⁺ g gamma -vibration in ¹⁵⁴Gd is observed since this coupling is not Pauli-blocked.

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