Level structure of68149Er81 and high-spin isomerism in proton-rich N=81, 82, 83 nuclei

R. Broda; P. J. Daly; J. McNeill; R. V.F. Janssens; D. C. Radford

doi:10.1007/BF01289565

Level structure of₆₈¹⁴⁹Er₈₁ and high-spin isomerism in proton-rich N=81, 82, 83 nuclei

R. Broda, P. J. Daly, J. McNeill, R. V.F. Janssens, D. C. Radford

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Abstract

The level structure of the N=81 nucleus¹⁴⁹Er has been studied by γ-ray spectroscopy following the reaction⁹²Mo+255 MeV⁶⁰Ni. Yrast levels in¹⁴⁹Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric states. Most of the observed levels are interpreted as seniority-three states arising from the coupling of s_1/2, d_3/2 and h_11/2 neutron holes with πh₁₁^2/n. Isomers identified in the reaction⁹⁶Ru+255 MeV⁵⁸Ni are tentatively assigned to¹⁵¹Yb. The B (E2) values of high-spin isomers in Z=66-70, N=81-83 nuclei are surveyed.

Original language	English
Pages (from-to)	403-408
Number of pages	6
Journal	Zeitschrift für Physik A Hadrons and Nuclei
Volume	327
Issue number	4
DOIs	https://doi.org/10.1007/BF01289565
State	Published - Dec 1987
Externally published	Yes

Keywords

21.60.Cs
23.20.Ck
23.20.Lo

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10.1007/BF01289565

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title = "Level structure of68149Er81 and high-spin isomerism in proton-rich N=81, 82, 83 nuclei",

abstract = "The level structure of the N=81 nucleus149Er has been studied by γ-ray spectroscopy following the reaction92Mo+255 MeV60Ni. Yrast levels in149Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric states. Most of the observed levels are interpreted as seniority-three states arising from the coupling of s1/2, d3/2 and h11/2 neutron holes with πh112/n. Isomers identified in the reaction96Ru+255 MeV58Ni are tentatively assigned to151Yb. The B (E2) values of high-spin isomers in Z=66-70, N=81-83 nuclei are surveyed.",

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year = "1987",

month = dec,

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T1 - Level structure of68149Er81 and high-spin isomerism in proton-rich N=81, 82, 83 nuclei

AU - Broda, R.

AU - Daly, P. J.

AU - McNeill, J.

AU - Janssens, R. V.F.

AU - Radford, D. C.

PY - 1987/12

Y1 - 1987/12

N2 - The level structure of the N=81 nucleus149Er has been studied by γ-ray spectroscopy following the reaction92Mo+255 MeV60Ni. Yrast levels in149Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric states. Most of the observed levels are interpreted as seniority-three states arising from the coupling of s1/2, d3/2 and h11/2 neutron holes with πh112/n. Isomers identified in the reaction96Ru+255 MeV58Ni are tentatively assigned to151Yb. The B (E2) values of high-spin isomers in Z=66-70, N=81-83 nuclei are surveyed.

AB - The level structure of the N=81 nucleus149Er has been studied by γ-ray spectroscopy following the reaction92Mo+255 MeV60Ni. Yrast levels in149Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric states. Most of the observed levels are interpreted as seniority-three states arising from the coupling of s1/2, d3/2 and h11/2 neutron holes with πh112/n. Isomers identified in the reaction96Ru+255 MeV58Ni are tentatively assigned to151Yb. The B (E2) values of high-spin isomers in Z=66-70, N=81-83 nuclei are surveyed.

KW - 21.60.Cs

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KW - 23.20.Lo

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DO - 10.1007/BF01289565

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JO - Zeitschrift für Physik A Hadrons and Nuclei

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Level structure of₆₈¹⁴⁹Er₈₁ and high-spin isomerism in proton-rich N=81, 82, 83 nuclei

Abstract

Keywords

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