Excitation of M1 states in 58Ni and 60Ni by 65 MeV polarized proton inelastic scattering

doi:10.1016/0375-9474(86)90267-8

Nuclear Physics A

Volume 454, Issue 2, 16 June 1986, Pages 237-251

https://doi.org/10.1016/0375-9474(86)90267-8 Get rights and content

Abstract

We studied the 1⁺ states in ⁵⁸Ni and ⁶⁰Ni by using the $^{58} Ni (p, p ′)^{58} Ni$ and $^{60} Ni (p, p ′)^{60} Ni$ reactions at 65 MeV with high resolution, in order to search for the fragmentation of the 1⁺ states at excitation energies of E_x = 7–11 MeV. From the similarity in experimental shapes of both cross sections and analyzing powers for the well-known 1⁺ states and from comparison with microscopic DWBA calculations under the assumptions of pure $(f_{72}^{−1} f_{52})$ and $ν(p_{32} P_{12})$ configurations, four states in ⁵⁸Ni and one state in ⁶⁰Ni have been identified as the candidates of the 1⁺ states of a $(f_{72}^{−1} f_{52})$ or $ν(p_{32}$ P_$12$) configuration in the M1 giant resonance region of E_x = 7–10 MeV, though the strengths are very weak.

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Nuclear data sheets for A = 60
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Nuclear Data Sheets for A = 58
2010, Nuclear Data Sheets
The evaluated spectroscopic data are presented for known nuclides of mass 58 (Ca,Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn). Excited-state data are nonexistent for ⁵⁸Ca, ⁵⁸Sc, and ⁵⁸Zn; and very scarce for ⁵⁸Ti and ⁵⁸V, with only one tentative level in each case. Except for half-lives, no other radioactive decay data are available for the decay of ⁵⁸Sc and ⁵⁸Ti. The radioactive decays of ⁵⁸V, ⁵⁸Cr and ⁵⁸Zn are not considered as well established. Superdeformed structures are known in ⁵⁸Ni (two bands) and in ⁵⁸Cu (one band). Prompt proton decay of high-spin states in 58Ni for eight levels and prompt α decay for two states have been identified. In ⁵⁸Cu, one high-spin state decays by prompt proton emission. Very complex high-spin structures are now known for ⁵⁸Ni from the work by 2009Jo03.
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Nuclear data sheets for A = 58
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Isospin decomposition of the Gamow-Teller strength in <sup>58</sup>Cu
1996, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The Gamow-Teller (GT) strength excited by a (p, n)-type reaction on a nucleus with isospin T₀ and N > Z is shared by isospin components T₀ − 1, T₀ and T₀ + 1. A good energy resolution (³He, t) reaction on ⁵⁸Ni revealed the fine structure of the GT strength in ⁵⁸Cu. The isospin of each level constituting the fine structure was assigned by comparing to results from inelastic electron and proton scatterings and (n, p)-type reactions, thus resolving the isospin structure of the GT strength in ⁵⁸Cu. The ratio of the summed GT strengths among the three isospin components is well described by a shell-model calculation.
Nuclear data sheets update for A = 60
1993, Nuclear Data Sheets

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^∗: Present address: Sanyo Electric Co., Ltd.

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Excitation of M1 states in 58Ni and 60Ni by 65 MeV polarized proton inelastic scattering

Abstract

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Nucl. Instr. Meth.

Nucl. Instr. Meth.

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Excitation of M1 states in ⁵⁸Ni and ⁶⁰Ni by 65 MeV polarized proton inelastic scattering