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Author  |
Cho, Y. et al; Perez-Vidal, R.M. |
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Title |
Regularity of core coupled high-spin structure in neutron-rich 196-202Au isotopes approaching N=126 |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physics Letters B |
Abbreviated Journal |
Phys. Lett. B |
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Volume |
878 |
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Pages |
140558 - 7pp |
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Keywords |
Nuclear structure; Prompt and delayed 1-ray spectroscopy; Shell-model calculations; AGATA; VAMOS plus plus |
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Abstract |
Excited states built upon long-lived high-spin isomers in hard-to-reach neutron-rich Au (Z = 79) isotopes were populated using multi-nucleon transfer reactions between 136Xe and 198Pt at 7 MeV/u. These states in 196,198-202Au were identified for the first time using the powerful combination of the VAMOS++ spectrometer, the CATLIFE detection system, and the AGATA 1-ray tracking array. Their measured energies exhibit remarkable regularity as a function of neutron number and are seen to be inherited from the energies of yrast-band members in the corresponding Hg (Z = 80) isotope. Large-scale shell-model calculations reproduce the observed regularity and show that these states arise from the unique-parity orbitals 20h11/2 and v0i13/2 coupled to the Hg core. This regularity is due to the dominant proton configurations of the Hg and Au isotopes, where the level energies are almost independent of different neutron-orbital occupancies. The calculated Au wave functions show significant higher-spin components of the corresponding Hg core, unlike what is expected in the conventional interpretation in terms of the weak-coupling/decoupling limits of the particle-core coupling model. |
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Address |
[Cho, Y.; Son, Y.; Choi, S.] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea, Email: yunghee.kim@ibs.re.kr |
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Publisher |
Elsevier |
Place of Publication |
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Language |
English |
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Original Title |
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Series Volume |
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Edition |
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ISSN |
0370-2693 |
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Notes |
WOS:001785274800001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7270 |
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