The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd

P. J. Davies; H. Grawe; K. Moschner; A. Blazhev; R. Wadsworth; P. Boutachkov; F. Ameil; A. Yagi; H. Baba; T. Bäck; M. Dewald; P. Doornenbal; T. Faestermann; A. Gengelbach; J. Gerl; R. Gernhäeuser; S. Go; M. Górska; E. Gregor; T. Isobe; D. G. Jenkins; H. Hotaka; J. Jolie; I. Kojouharov; N. Kurz; M. Lewitowicz; G. Lorusso; L. Maier; E. Merchan; F. Naqvi; H. Nishibata; D. Nishimura; S. Nishimura; F. Nowacki; N. Pietralla; H. Schaffner; P. A. Söderström; H. S. Jung; K. Steiger; T. Sumikama; J. Taprogge; P. Thöle; N. Warr; H. Watanabe; V. Werner; Z. Y. Xu; K. Yoshinaga; Y. Zhu

doi:10.1016/j.physletb.2017.02.013

The role of core excitations in the structure and decay of the 16⁺ spin-gap isomer in ⁹⁶Cd

P. J. Davies^*, H. Grawe, K. Moschner, A. Blazhev, R. Wadsworth, P. Boutachkov, F. Ameil, A. Yagi, H. Baba, T. Bäck, M. Dewald, P. Doornenbal, T. Faestermann, A. Gengelbach, J. Gerl, R. Gernhäeuser, S. Go, M. Górska, E. Gregor, T. IsobeD. G. Jenkins, H. Hotaka, J. Jolie, I. Kojouharov, N. Kurz, M. Lewitowicz, G. Lorusso, L. Maier, E. Merchan, F. Naqvi, H. Nishibata, D. Nishimura, S. Nishimura, F. Nowacki, N. Pietralla, H. Schaffner, P. A. Söderström, H. S. Jung, K. Steiger, T. Sumikama, J. Taprogge, P. Thöle, N. Warr, H. Watanabe, V. Werner, Z. Y. Xu, K. Yoshinaga, Y. Zhu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The first evidence for β-delayed proton emission from the 16⁺ spin gap isomer in ⁹⁶Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. βp branching ratios for the ground state and 16⁺ isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of ⁹⁵Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for ℓ=0,2,4 proton emission from three resonance-like states in ⁹⁶Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that ℓ=2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16⁺ state.

Original language	English
Pages (from-to)	474-479
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	767
Early online date	14 Feb 2017
DOIs	https://doi.org/10.1016/j.physletb.2017.02.013
Publication status	Published - 10 Apr 2017

Bibliographical note

Keywords

Half-life
Shell-model
WKB
β-decay
βp-decay
γ-ray spectroscopy

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10.1016/j.physletb.2017.02.013

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Cite this

Davies, P. J., Grawe, H., Moschner, K., Blazhev, A., Wadsworth, R., Boutachkov, P., Ameil, F., Yagi, A., Baba, H., Bäck, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhäeuser, R., Go, S., Górska, M., Gregor, E., ... Zhu, Y. (2017). The role of core excitations in the structure and decay of the 16⁺ spin-gap isomer in ⁹⁶Cd. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 767, 474-479. https://doi.org/10.1016/j.physletb.2017.02.013

@article{aa8c178adb2d4724934c9218cc733042,

title = "The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd",

abstract = "The first evidence for β-delayed proton emission from the 16+ spin gap isomer in 96Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. βp branching ratios for the ground state and 16+ isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of 95Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for ℓ=0,2,4 proton emission from three resonance-like states in 96Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that ℓ=2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16+ state.",

keywords = "Half-life, Shell-model, WKB, β-decay, βp-decay, γ-ray spectroscopy",

author = "Davies, {P. J.} and H. Grawe and K. Moschner and A. Blazhev and R. Wadsworth and P. Boutachkov and F. Ameil and A. Yagi and H. Baba and T. B{\"a}ck and M. Dewald and P. Doornenbal and T. Faestermann and A. Gengelbach and J. Gerl and R. Gernh{\"a}euser and S. Go and M. G{\'o}rska and E. Gregor and T. Isobe and Jenkins, {D. G.} and H. Hotaka and J. Jolie and I. Kojouharov and N. Kurz and M. Lewitowicz and G. Lorusso and L. Maier and E. Merchan and F. Naqvi and H. Nishibata and D. Nishimura and S. Nishimura and F. Nowacki and N. Pietralla and H. Schaffner and S{\"o}derstr{\"o}m, {P. A.} and Jung, {H. S.} and K. Steiger and T. Sumikama and J. Taprogge and P. Th{\"o}le and N. Warr and H. Watanabe and V. Werner and Xu, {Z. Y.} and K. Yoshinaga and Y. Zhu",

note = "{\textcopyright} 2017, The Authors.",

year = "2017",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2017.02.013",

language = "English",

volume = "767",

pages = "474--479",

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

issn = "0370-2693",

publisher = "Elsevier",

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Davies, PJ, Grawe, H, Moschner, K, Blazhev, A, Wadsworth, R, Boutachkov, P, Ameil, F, Yagi, A, Baba, H, Bäck, T, Dewald, M, Doornenbal, P, Faestermann, T, Gengelbach, A, Gerl, J, Gernhäeuser, R, Go, S, Górska, M, Gregor, E, Isobe, T, Jenkins, DG, Hotaka, H, Jolie, J, Kojouharov, I, Kurz, N, Lewitowicz, M, Lorusso, G, Maier, L, Merchan, E, Naqvi, F, Nishibata, H, Nishimura, D, Nishimura, S, Nowacki, F, Pietralla, N, Schaffner, H, Söderström, PA, Jung, HS, Steiger, K, Sumikama, T, Taprogge, J, Thöle, P, Warr, N, Watanabe, H, Werner, V, Xu, ZY, Yoshinaga, K & Zhu, Y 2017, 'The role of core excitations in the structure and decay of the 16⁺ spin-gap isomer in ⁹⁶Cd', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 767, pp. 474-479. https://doi.org/10.1016/j.physletb.2017.02.013

TY - JOUR

T1 - The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd

AU - Davies, P. J.

AU - Grawe, H.

AU - Moschner, K.

AU - Blazhev, A.

AU - Wadsworth, R.

AU - Boutachkov, P.

AU - Ameil, F.

AU - Yagi, A.

AU - Baba, H.

AU - Bäck, T.

AU - Dewald, M.

AU - Doornenbal, P.

AU - Faestermann, T.

AU - Gengelbach, A.

AU - Gerl, J.

AU - Gernhäeuser, R.

AU - Go, S.

AU - Górska, M.

AU - Gregor, E.

AU - Isobe, T.

AU - Jenkins, D. G.

AU - Hotaka, H.

AU - Jolie, J.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Lewitowicz, M.

AU - Lorusso, G.

AU - Maier, L.

AU - Merchan, E.

AU - Naqvi, F.

AU - Nishibata, H.

AU - Nishimura, D.

AU - Nishimura, S.

AU - Nowacki, F.

AU - Pietralla, N.

AU - Schaffner, H.

AU - Söderström, P. A.

AU - Jung, H. S.

AU - Steiger, K.

AU - Sumikama, T.

AU - Taprogge, J.

AU - Thöle, P.

AU - Warr, N.

AU - Watanabe, H.

AU - Werner, V.

AU - Xu, Z. Y.

AU - Yoshinaga, K.

AU - Zhu, Y.

PY - 2017/4/10

Y1 - 2017/4/10

N2 - The first evidence for β-delayed proton emission from the 16+ spin gap isomer in 96Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. βp branching ratios for the ground state and 16+ isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of 95Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for ℓ=0,2,4 proton emission from three resonance-like states in 96Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that ℓ=2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16+ state.

AB - The first evidence for β-delayed proton emission from the 16+ spin gap isomer in 96Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. βp branching ratios for the ground state and 16+ isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of 95Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for ℓ=0,2,4 proton emission from three resonance-like states in 96Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that ℓ=2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16+ state.

KW - Half-life

KW - Shell-model

KW - WKB

KW - β-decay

KW - βp-decay

KW - γ-ray spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85014733974&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.02.013

DO - 10.1016/j.physletb.2017.02.013

M3 - Article

AN - SCOPUS:85014733974

SN - 0370-2693

VL - 767

SP - 474

EP - 479

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

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

ER -

The role of core excitations in the structure and decay of the 16⁺ spin-gap isomer in ⁹⁶Cd

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Nuclear Physics Consolidated Grant

Cite this

The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Projects

Nuclear Physics Consolidated Grant

Cite this

The role of core excitations in the structure and decay of the 16⁺ spin-gap isomer in ⁹⁶Cd