High-j single-particle neutron states outside the N = 82 core

B. P. Kay; S. J. Freeman; J. P. Schiffer; J. A. Clark; C. Deibel; A. Heinz; A. Parikh; C. Wrede

doi:10.1016/j.physletb.2007.11.033

High-j single-particle neutron states outside the N = 82 core

B. P. Kay, S. J. Freeman, J. P. Schiffer, J. A. Clark, C. Deibel, A. Heinz, A. Parikh, C. Wrede

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Abstract

The behaviour of the i13 / 2 and h9 / 2 single-neutron strength was studied with the (α, 3He) reaction on 138Ba, 140Ce, 142Nd and 144Sm targets at a beam energy of 51 MeV. The separation between the single-neutron states i13 / 2 and h9 / 2 was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-ℓ transfer were extracted from the data. Some mixing of ℓ = 5 and 6 strength was observed with states that are formed by coupling the f7 / 2 state to the 2+ and 3- vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i13 / 2 and h9 / 2 single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. © 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	216-221
Number of pages	5
Journal	Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	658
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2007.11.033
Publication status	Published - 10 Jan 2008

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10.1016/j.physletb.2007.11.033

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@article{3dc362c1f94a4b6e9e2c18eab97bf7aa,

title = "High-j single-particle neutron states outside the N = 82 core",

abstract = "The behaviour of the i13 / 2 and h9 / 2 single-neutron strength was studied with the (α, 3He) reaction on 138Ba, 140Ce, 142Nd and 144Sm targets at a beam energy of 51 MeV. The separation between the single-neutron states i13 / 2 and h9 / 2 was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-ℓ transfer were extracted from the data. Some mixing of ℓ = 5 and 6 strength was observed with states that are formed by coupling the f7 / 2 state to the 2+ and 3- vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i13 / 2 and h9 / 2 single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. {\textcopyright} 2007 Elsevier B.V. All rights reserved.",

author = "Kay, {B. P.} and Freeman, {S. J.} and Schiffer, {J. P.} and Clark, {J. A.} and C. Deibel and A. Heinz and A. Parikh and C. Wrede",

note = "Kay, B. P. Freeman, S. J. Schiffer, J. P. Clark, J. A. Deibel, C. Heinz, A. Parikh, A. Wrede, C.",

year = "2008",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2007.11.033",

language = "English",

volume = "658",

pages = "216--221",

journal = "Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

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TY - JOUR

T1 - High-j single-particle neutron states outside the N = 82 core

AU - Kay, B. P.

AU - Freeman, S. J.

AU - Schiffer, J. P.

AU - Clark, J. A.

AU - Deibel, C.

AU - Heinz, A.

AU - Parikh, A.

AU - Wrede, C.

N1 - Kay, B. P. Freeman, S. J. Schiffer, J. P. Clark, J. A. Deibel, C. Heinz, A. Parikh, A. Wrede, C.

PY - 2008/1/10

Y1 - 2008/1/10

N2 - The behaviour of the i13 / 2 and h9 / 2 single-neutron strength was studied with the (α, 3He) reaction on 138Ba, 140Ce, 142Nd and 144Sm targets at a beam energy of 51 MeV. The separation between the single-neutron states i13 / 2 and h9 / 2 was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-ℓ transfer were extracted from the data. Some mixing of ℓ = 5 and 6 strength was observed with states that are formed by coupling the f7 / 2 state to the 2+ and 3- vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i13 / 2 and h9 / 2 single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. © 2007 Elsevier B.V. All rights reserved.

AB - The behaviour of the i13 / 2 and h9 / 2 single-neutron strength was studied with the (α, 3He) reaction on 138Ba, 140Ce, 142Nd and 144Sm targets at a beam energy of 51 MeV. The separation between the single-neutron states i13 / 2 and h9 / 2 was measured in N = 83 nuclei with changing proton number. To this end spectroscopic factors for states populated in high-ℓ transfer were extracted from the data. Some mixing of ℓ = 5 and 6 strength was observed with states that are formed by coupling the f7 / 2 state to the 2+ and 3- vibrational states and the mixing matrix elements were found to be remarkably constant. The centroids of the strength indicate a systematic change in the energies of the i13 / 2 and h9 / 2 single-neutron states with increasing proton number that is in quantitative agreement with the effects expected from the tensor interaction. © 2007 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.physletb.2007.11.033

DO - 10.1016/j.physletb.2007.11.033

M3 - Article

SN - 0370-2693

VL - 658

SP - 216

EP - 221

JO - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 5

ER -

High-j single-particle neutron states outside the N = 82 core

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