Decay spectroscopy of 160Sm

The lightest four-quasiparticle K isomer

Z. Patel, Zs Podolyák, P. M. Walker, P. H. Regan, P. A. Söderström, H. Watanabe, E. Ideguchi, G. S. Simpson, S. Nishimura, F. Browne, P. Doornenbal, G. Lorusso, S. Rice, L. Sinclair, T. Sumikama, J. Wu, Z. Y. Xu, N. Aoi, H. Baba, F. L. Bello Garrote & 37 others G. Benzoni, R. Daido, Zs Dombrádi, Y. Fang, N. Fukuda, G. Gey, Shintaro Go, A. Gottardo, N. Inabe, T. Isobe, D. Kameda, K. Kobayashi, M. Kobayashi, T. Komatsubara, I. Kojouharov, T. Kubo, N. Kurz, I. Kuti, Z. Li, H. L. Liu, M. Matsushita, S. Michimasa, C. B. Moon, H. Nishibata, I. Nishizuka, A. Odahara, E. Şahin, H. Sakurai, H. Schaffner, H. Suzuki, H. Takeda, M. Tanaka, J. Taprogge, Zs Vajta, F. R. Xu, A. Yagi, R. Yokoyama

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The decay of a new four-quasiparticle isomeric state in 160Sm has been observed using γ-ray spectroscopy at the RIBF, RIKEN. The four-quasiparticle state is assigned a 2π⊗2ν π5/2-[532], π5/2+[413], ν5/2-[523], ν7/2+[633] configuration. The half-life of this (11+) state is measured to be 1.8(4) μs. The (11+) isomer decays into a rotational band structure, based on a (6-) ν5/2-[523]⊗ν7/2+[633] bandhead, consistent with the gK-gR values. This decays to a (5-) two-proton quasiparticle state, which in turn decays to the ground state band. Potential energy surface and blocked-BCS calculations were performed in the deformed midshell region around 160Sm. They reveal a significant influence from β6 deformation and that 160Sm is the best candidate for the lightest four-quasiparticle K isomer to exist in this region. The relationship between reduced hindrance and isomer excitation energy for E1 transitions from multiquasiparticle states is considered with the new data from 160Sm. The E1 data are found to agree with the existing relationship for E2 transitions.

Original languageEnglish
Pages (from-to)182-186
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume753
DOIs
Publication statusPublished - Feb 10 2016

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isomers
decay
spectroscopy
half life
rays
potential energy
ground state
protons
configurations
excitation
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Patel, Z., Podolyák, Z., Walker, P. M., Regan, P. H., Söderström, P. A., Watanabe, H., ... Yokoyama, R. (2016). Decay spectroscopy of 160Sm: The lightest four-quasiparticle K isomer. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 753, 182-186. https://doi.org/10.1016/j.physletb.2015.12.026

Decay spectroscopy of 160Sm : The lightest four-quasiparticle K isomer. / Patel, Z.; Podolyák, Zs; Walker, P. M.; Regan, P. H.; Söderström, P. A.; Watanabe, H.; Ideguchi, E.; Simpson, G. S.; Nishimura, S.; Browne, F.; Doornenbal, P.; Lorusso, G.; Rice, S.; Sinclair, L.; Sumikama, T.; Wu, J.; Xu, Z. Y.; Aoi, N.; Baba, H.; Bello Garrote, F. L.; Benzoni, G.; Daido, R.; Dombrádi, Zs; Fang, Y.; Fukuda, N.; Gey, G.; Go, Shintaro; Gottardo, A.; Inabe, N.; Isobe, T.; Kameda, D.; Kobayashi, K.; Kobayashi, M.; Komatsubara, T.; Kojouharov, I.; Kubo, T.; Kurz, N.; Kuti, I.; Li, Z.; Liu, H. L.; Matsushita, M.; Michimasa, S.; Moon, C. B.; Nishibata, H.; Nishizuka, I.; Odahara, A.; Şahin, E.; Sakurai, H.; Schaffner, H.; Suzuki, H.; Takeda, H.; Tanaka, M.; Taprogge, J.; Vajta, Zs; Xu, F. R.; Yagi, A.; Yokoyama, R.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 753, 10.02.2016, p. 182-186.

Research output: Contribution to journalArticle

Patel, Z, Podolyák, Z, Walker, PM, Regan, PH, Söderström, PA, Watanabe, H, Ideguchi, E, Simpson, GS, Nishimura, S, Browne, F, Doornenbal, P, Lorusso, G, Rice, S, Sinclair, L, Sumikama, T, Wu, J, Xu, ZY, Aoi, N, Baba, H, Bello Garrote, FL, Benzoni, G, Daido, R, Dombrádi, Z, Fang, Y, Fukuda, N, Gey, G, Go, S, Gottardo, A, Inabe, N, Isobe, T, Kameda, D, Kobayashi, K, Kobayashi, M, Komatsubara, T, Kojouharov, I, Kubo, T, Kurz, N, Kuti, I, Li, Z, Liu, HL, Matsushita, M, Michimasa, S, Moon, CB, Nishibata, H, Nishizuka, I, Odahara, A, Şahin, E, Sakurai, H, Schaffner, H, Suzuki, H, Takeda, H, Tanaka, M, Taprogge, J, Vajta, Z, Xu, FR, Yagi, A & Yokoyama, R 2016, 'Decay spectroscopy of 160Sm: The lightest four-quasiparticle K isomer', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 753, pp. 182-186. https://doi.org/10.1016/j.physletb.2015.12.026
Patel, Z. ; Podolyák, Zs ; Walker, P. M. ; Regan, P. H. ; Söderström, P. A. ; Watanabe, H. ; Ideguchi, E. ; Simpson, G. S. ; Nishimura, S. ; Browne, F. ; Doornenbal, P. ; Lorusso, G. ; Rice, S. ; Sinclair, L. ; Sumikama, T. ; Wu, J. ; Xu, Z. Y. ; Aoi, N. ; Baba, H. ; Bello Garrote, F. L. ; Benzoni, G. ; Daido, R. ; Dombrádi, Zs ; Fang, Y. ; Fukuda, N. ; Gey, G. ; Go, Shintaro ; Gottardo, A. ; Inabe, N. ; Isobe, T. ; Kameda, D. ; Kobayashi, K. ; Kobayashi, M. ; Komatsubara, T. ; Kojouharov, I. ; Kubo, T. ; Kurz, N. ; Kuti, I. ; Li, Z. ; Liu, H. L. ; Matsushita, M. ; Michimasa, S. ; Moon, C. B. ; Nishibata, H. ; Nishizuka, I. ; Odahara, A. ; Şahin, E. ; Sakurai, H. ; Schaffner, H. ; Suzuki, H. ; Takeda, H. ; Tanaka, M. ; Taprogge, J. ; Vajta, Zs ; Xu, F. R. ; Yagi, A. ; Yokoyama, R. / Decay spectroscopy of 160Sm : The lightest four-quasiparticle K isomer. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2016 ; Vol. 753. pp. 182-186.
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title = "Decay spectroscopy of 160Sm: The lightest four-quasiparticle K isomer",
abstract = "The decay of a new four-quasiparticle isomeric state in 160Sm has been observed using γ-ray spectroscopy at the RIBF, RIKEN. The four-quasiparticle state is assigned a 2π⊗2ν π5/2-[532], π5/2+[413], ν5/2-[523], ν7/2+[633] configuration. The half-life of this (11+) state is measured to be 1.8(4) μs. The (11+) isomer decays into a rotational band structure, based on a (6-) ν5/2-[523]⊗ν7/2+[633] bandhead, consistent with the gK-gR values. This decays to a (5-) two-proton quasiparticle state, which in turn decays to the ground state band. Potential energy surface and blocked-BCS calculations were performed in the deformed midshell region around 160Sm. They reveal a significant influence from β6 deformation and that 160Sm is the best candidate for the lightest four-quasiparticle K isomer to exist in this region. The relationship between reduced hindrance and isomer excitation energy for E1 transitions from multiquasiparticle states is considered with the new data from 160Sm. The E1 data are found to agree with the existing relationship for E2 transitions.",
author = "Z. Patel and Zs Podoly{\'a}k and Walker, {P. M.} and Regan, {P. H.} and S{\"o}derstr{\"o}m, {P. A.} and H. Watanabe and E. Ideguchi and Simpson, {G. S.} and S. Nishimura and F. Browne and P. Doornenbal and G. Lorusso and S. Rice and L. Sinclair and T. Sumikama and J. Wu and Xu, {Z. Y.} and N. Aoi and H. Baba and {Bello Garrote}, {F. L.} and G. Benzoni and R. Daido and Zs Dombr{\'a}di and Y. Fang and N. Fukuda and G. Gey and Shintaro Go and A. Gottardo and N. Inabe and T. Isobe and D. Kameda and K. Kobayashi and M. Kobayashi and T. Komatsubara and I. Kojouharov and T. Kubo and N. Kurz and I. Kuti and Z. Li and Liu, {H. L.} and M. Matsushita and S. Michimasa and Moon, {C. B.} and H. Nishibata and I. Nishizuka and A. Odahara and E. Şahin and H. Sakurai and H. Schaffner and H. Suzuki and H. Takeda and M. Tanaka and J. Taprogge and Zs Vajta and Xu, {F. R.} and A. Yagi and R. Yokoyama",
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TY - JOUR

T1 - Decay spectroscopy of 160Sm

T2 - The lightest four-quasiparticle K isomer

AU - Patel, Z.

AU - Podolyák, Zs

AU - Walker, P. M.

AU - Regan, P. H.

AU - Söderström, P. A.

AU - Watanabe, H.

AU - Ideguchi, E.

AU - Simpson, G. S.

AU - Nishimura, S.

AU - Browne, F.

AU - Doornenbal, P.

AU - Lorusso, G.

AU - Rice, S.

AU - Sinclair, L.

AU - Sumikama, T.

AU - Wu, J.

AU - Xu, Z. Y.

AU - Aoi, N.

AU - Baba, H.

AU - Bello Garrote, F. L.

AU - Benzoni, G.

AU - Daido, R.

AU - Dombrádi, Zs

AU - Fang, Y.

AU - Fukuda, N.

AU - Gey, G.

AU - Go, Shintaro

AU - Gottardo, A.

AU - Inabe, N.

AU - Isobe, T.

AU - Kameda, D.

AU - Kobayashi, K.

AU - Kobayashi, M.

AU - Komatsubara, T.

AU - Kojouharov, I.

AU - Kubo, T.

AU - Kurz, N.

AU - Kuti, I.

AU - Li, Z.

AU - Liu, H. L.

AU - Matsushita, M.

AU - Michimasa, S.

AU - Moon, C. B.

AU - Nishibata, H.

AU - Nishizuka, I.

AU - Odahara, A.

AU - Şahin, E.

AU - Sakurai, H.

AU - Schaffner, H.

AU - Suzuki, H.

AU - Takeda, H.

AU - Tanaka, M.

AU - Taprogge, J.

AU - Vajta, Zs

AU - Xu, F. R.

AU - Yagi, A.

AU - Yokoyama, R.

PY - 2016/2/10

Y1 - 2016/2/10

N2 - The decay of a new four-quasiparticle isomeric state in 160Sm has been observed using γ-ray spectroscopy at the RIBF, RIKEN. The four-quasiparticle state is assigned a 2π⊗2ν π5/2-[532], π5/2+[413], ν5/2-[523], ν7/2+[633] configuration. The half-life of this (11+) state is measured to be 1.8(4) μs. The (11+) isomer decays into a rotational band structure, based on a (6-) ν5/2-[523]⊗ν7/2+[633] bandhead, consistent with the gK-gR values. This decays to a (5-) two-proton quasiparticle state, which in turn decays to the ground state band. Potential energy surface and blocked-BCS calculations were performed in the deformed midshell region around 160Sm. They reveal a significant influence from β6 deformation and that 160Sm is the best candidate for the lightest four-quasiparticle K isomer to exist in this region. The relationship between reduced hindrance and isomer excitation energy for E1 transitions from multiquasiparticle states is considered with the new data from 160Sm. The E1 data are found to agree with the existing relationship for E2 transitions.

AB - The decay of a new four-quasiparticle isomeric state in 160Sm has been observed using γ-ray spectroscopy at the RIBF, RIKEN. The four-quasiparticle state is assigned a 2π⊗2ν π5/2-[532], π5/2+[413], ν5/2-[523], ν7/2+[633] configuration. The half-life of this (11+) state is measured to be 1.8(4) μs. The (11+) isomer decays into a rotational band structure, based on a (6-) ν5/2-[523]⊗ν7/2+[633] bandhead, consistent with the gK-gR values. This decays to a (5-) two-proton quasiparticle state, which in turn decays to the ground state band. Potential energy surface and blocked-BCS calculations were performed in the deformed midshell region around 160Sm. They reveal a significant influence from β6 deformation and that 160Sm is the best candidate for the lightest four-quasiparticle K isomer to exist in this region. The relationship between reduced hindrance and isomer excitation energy for E1 transitions from multiquasiparticle states is considered with the new data from 160Sm. The E1 data are found to agree with the existing relationship for E2 transitions.

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U2 - 10.1016/j.physletb.2015.12.026

DO - 10.1016/j.physletb.2015.12.026

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EP - 186

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

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

SN - 0370-2693

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