Isomer spectroscopy of neutron-rich 165,167Tb

L. A. Gurgi; P. H. Regan; P. A. Söderström; H. Watanabe; P. M. Walker; Zs Podolyák; S. Nishimura; T. A. Berry; P. Doornenbal; G. Lorusso; T. Isobe; H. Baba; Z. Y. Xu; H. Sakurai; T. Sumikama; W. N. Catford; A. M. Bruce; F. Browne; G. J. Lane; F. G. Kondev; A. Odahara; J. Wu; H. L. Liu; F. R. Xu; Z. Korkulu; P. Lee; J. J. Liu; V. H. Phong; A. Yagi; G. X. Zhang; T. Alharbi; R. J. Carroll; K. Y. Chae; Zs Dombradi; A. Estrade; N. Fukuda; C. Griffin; E. Ideguchi; N. Inabe; H. Kanaoka; I. Kojouharov; T. Kubo; S. Kubono; N. Kurz; I. Kuti; S. Lalkovski; E. J. Lee; C. S. Lee; G. Lotay; C. B. Moon; I. Nishizuka; C. R. Nita; Z. Patel; O. J. Roberts; H. Schaffner; C. M. Shand; H. Suzuki; H. Takeda; S. Terashima; Zs Vajta; S. Kanaya; J. J. Valiente-Dobón

doi:10.5506/APhysPolB.48.601

Isomer spectroscopy of neutron-rich ^165,167Tb

L. A. Gurgi, P. H. Regan, P. A. Söderström, H. Watanabe, P. M. Walker, Zs Podolyák, S. Nishimura, T. A. Berry, P. Doornenbal, G. Lorusso, T. Isobe, H. Baba, Z. Y. Xu, H. Sakurai, T. Sumikama, W. N. Catford, A. M. Bruce, F. Browne, G. J. Lane, F. G. KondevA. Odahara, J. Wu, H. L. Liu, F. R. Xu, Z. Korkulu, P. Lee, J. J. Liu, V. H. Phong, A. Yagi, G. X. Zhang, T. Alharbi, R. J. Carroll, K. Y. Chae, Zs Dombradi, A. Estrade, N. Fukuda, C. Griffin, E. Ideguchi, N. Inabe, H. Kanaoka, I. Kojouharov, T. Kubo, S. Kubono, N. Kurz, I. Kuti, S. Lalkovski, E. J. Lee, C. S. Lee, G. Lotay, C. B. Moon, I. Nishizuka, C. R. Nita, Z. Patel, O. J. Roberts, H. Schaffner, C. M. Shand, H. Suzuki, H. Takeda, S. Terashima, Zs Vajta, S. Kanaya, J. J. Valiente-Dobón

Physics

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Abstract

We present information on the excited states in the prolate-deformed, neutron-rich nuclei ^165,167Tb_100,102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon ²³⁸U primary beam on a 2 mm ⁹Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the μs regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in ¹⁶⁵Tb and ¹⁶⁷Tb and interpreted as arising from hindered E1 decay from the 7/2 ^- [523] single quasi-proton Nilsson configuration to rotational states built on the 3/2 ^- [411] single quasi-proton ground state. These data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the ¹⁷⁰Dy doubly-midshell nucleus is approached.

Original language	English
Pages (from-to)	601-608
Number of pages	8
Journal	Acta Physica Polonica B
Volume	48
Issue number	3
DOIs	https://doi.org/10.5506/APhysPolB.48.601
State	Published - Mar 2017

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Gurgi, L. A., Regan, P. H., Söderström, P. A., Watanabe, H., Walker, P. M., Podolyák, Z., Nishimura, S., Berry, T. A., Doornenbal, P., Lorusso, G., Isobe, T., Baba, H., Xu, Z. Y., Sakurai, H., Sumikama, T., Catford, W. N., Bruce, A. M., Browne, F., Lane, G. J., ... Valiente-Dobón, J. J. (2017). Isomer spectroscopy of neutron-rich ^165,167Tb. Acta Physica Polonica B, 48(3), 601-608. https://doi.org/10.5506/APhysPolB.48.601

@article{b1b472d2785f4a27b5fb7ce1c67b7de0,

title = "Isomer spectroscopy of neutron-rich 165,167Tb",

abstract = "We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167Tb100,102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm 9Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the μs regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in 165Tb and 167Tb and interpreted as arising from hindered E1 decay from the 7/2 - [523] single quasi-proton Nilsson configuration to rotational states built on the 3/2 - [411] single quasi-proton ground state. These data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the 170Dy doubly-midshell nucleus is approached.",

author = "Gurgi, {L. A.} and Regan, {P. H.} and S{\"o}derstr{\"o}m, {P. A.} and H. Watanabe and Walker, {P. M.} and Zs Podoly{\'a}k and S. Nishimura and Berry, {T. A.} and P. Doornenbal and G. Lorusso and T. Isobe and H. Baba and Xu, {Z. Y.} and H. Sakurai and T. Sumikama and Catford, {W. N.} and Bruce, {A. M.} and F. Browne and Lane, {G. J.} and Kondev, {F. G.} and A. Odahara and J. Wu and Liu, {H. L.} and Xu, {F. R.} and Z. Korkulu and P. Lee and Liu, {J. J.} and Phong, {V. H.} and A. Yagi and Zhang, {G. X.} and T. Alharbi and Carroll, {R. J.} and Chae, {K. Y.} and Zs Dombradi and A. Estrade and N. Fukuda and C. Griffin and E. Ideguchi and N. Inabe and H. Kanaoka and I. Kojouharov and T. Kubo and S. Kubono and N. Kurz and I. Kuti and S. Lalkovski and Lee, {E. J.} and Lee, {C. S.} and G. Lotay and Moon, {C. B.} and I. Nishizuka and Nita, {C. R.} and Z. Patel and Roberts, {O. J.} and H. Schaffner and Shand, {C. M.} and H. Suzuki and H. Takeda and S. Terashima and Zs Vajta and S. Kanaya and Valiente-Dob{\'o}n, {J. J.}",

note = "Funding Information: The authors are indebted to the facility crews who provided the beams at RIBF, operated by RIKEN Nishina Center and CNS, University of Tokyo, the EUROBALL Owners Committee for the loan of germanium detectors, the PreSpec Collaboration for the use of the readout electronics. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by MSIP and NRF of Korea. This work is supported by the UK Science and Technology Facilities Council (STFC); the UK National Measurement Office (NMO, P.H.R.); JSPS KAKENHI grant Nos. 24740188, 25247045, and 25287065; the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract No. DE-AC02-06CH11357 (F.G.K.); NRF Korea grants Nos. 2009-0093817 and 2013R1A1A2063017 (C.S.L.), 2015R1D1A1A01056918, 2016R1A5A1013277 and 2016K1A3A7A 09005579 (K.Y.C.); the Hungarian Research Fund OTKA contract No. K100835 and Science Foundation Ireland under grant No. 12/IP/1288 (O.J.R.).",

year = "2017",

month = mar,

doi = "10.5506/APhysPolB.48.601",

language = "English",

volume = "48",

pages = "601--608",

journal = "Acta Physica Polonica B",

issn = "0587-4254",

publisher = "ACTA PHYSICA POLONICA B",

number = "3",

}

Gurgi, LA, Regan, PH, Söderström, PA, Watanabe, H, Walker, PM, Podolyák, Z, Nishimura, S, Berry, TA, Doornenbal, P, Lorusso, G, Isobe, T, Baba, H, Xu, ZY, Sakurai, H, Sumikama, T, Catford, WN, Bruce, AM, Browne, F, Lane, GJ, Kondev, FG, Odahara, A, Wu, J, Liu, HL, Xu, FR, Korkulu, Z, Lee, P, Liu, JJ, Phong, VH, Yagi, A, Zhang, GX, Alharbi, T, Carroll, RJ, Chae, KY, Dombradi, Z, Estrade, A, Fukuda, N, Griffin, C, Ideguchi, E, Inabe, N, Kanaoka, H, Kojouharov, I, Kubo, T, Kubono, S, Kurz, N, Kuti, I, Lalkovski, S, Lee, EJ, Lee, CS, Lotay, G, Moon, CB, Nishizuka, I, Nita, CR, Patel, Z, Roberts, OJ, Schaffner, H, Shand, CM, Suzuki, H, Takeda, H, Terashima, S, Vajta, Z, Kanaya, S & Valiente-Dobón, JJ 2017, 'Isomer spectroscopy of neutron-rich ^165,167Tb', Acta Physica Polonica B, vol. 48, no. 3, pp. 601-608. https://doi.org/10.5506/APhysPolB.48.601

TY - JOUR

T1 - Isomer spectroscopy of neutron-rich 165,167Tb

AU - Gurgi, L. A.

AU - Regan, P. H.

AU - Söderström, P. A.

AU - Watanabe, H.

AU - Walker, P. M.

AU - Podolyák, Zs

AU - Nishimura, S.

AU - Berry, T. A.

AU - Doornenbal, P.

AU - Lorusso, G.

AU - Isobe, T.

AU - Baba, H.

AU - Xu, Z. Y.

AU - Sakurai, H.

AU - Sumikama, T.

AU - Catford, W. N.

AU - Bruce, A. M.

AU - Browne, F.

AU - Lane, G. J.

AU - Kondev, F. G.

AU - Odahara, A.

AU - Wu, J.

AU - Liu, H. L.

AU - Xu, F. R.

AU - Korkulu, Z.

AU - Lee, P.

AU - Liu, J. J.

AU - Phong, V. H.

AU - Yagi, A.

AU - Zhang, G. X.

AU - Alharbi, T.

AU - Carroll, R. J.

AU - Chae, K. Y.

AU - Dombradi, Zs

AU - Estrade, A.

AU - Fukuda, N.

AU - Griffin, C.

AU - Ideguchi, E.

AU - Inabe, N.

AU - Kanaoka, H.

AU - Kojouharov, I.

AU - Kubo, T.

AU - Kubono, S.

AU - Kurz, N.

AU - Kuti, I.

AU - Lalkovski, S.

AU - Lee, E. J.

AU - Lee, C. S.

AU - Lotay, G.

AU - Moon, C. B.

AU - Nishizuka, I.

AU - Nita, C. R.

AU - Patel, Z.

AU - Roberts, O. J.

AU - Schaffner, H.

AU - Shand, C. M.

AU - Suzuki, H.

AU - Takeda, H.

AU - Terashima, S.

AU - Vajta, Zs

AU - Kanaya, S.

AU - Valiente-Dobón, J. J.

N1 - Funding Information: The authors are indebted to the facility crews who provided the beams at RIBF, operated by RIKEN Nishina Center and CNS, University of Tokyo, the EUROBALL Owners Committee for the loan of germanium detectors, the PreSpec Collaboration for the use of the readout electronics. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by MSIP and NRF of Korea. This work is supported by the UK Science and Technology Facilities Council (STFC); the UK National Measurement Office (NMO, P.H.R.); JSPS KAKENHI grant Nos. 24740188, 25247045, and 25287065; the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract No. DE-AC02-06CH11357 (F.G.K.); NRF Korea grants Nos. 2009-0093817 and 2013R1A1A2063017 (C.S.L.), 2015R1D1A1A01056918, 2016R1A5A1013277 and 2016K1A3A7A 09005579 (K.Y.C.); the Hungarian Research Fund OTKA contract No. K100835 and Science Foundation Ireland under grant No. 12/IP/1288 (O.J.R.).

PY - 2017/3

Y1 - 2017/3

N2 - We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167Tb100,102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm 9Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the μs regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in 165Tb and 167Tb and interpreted as arising from hindered E1 decay from the 7/2 - [523] single quasi-proton Nilsson configuration to rotational states built on the 3/2 - [411] single quasi-proton ground state. These data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the 170Dy doubly-midshell nucleus is approached.

AB - We present information on the excited states in the prolate-deformed, neutron-rich nuclei 165,167Tb100,102. The nuclei of interest were synthesised following in-flight fission of a 345 MeV per nucleon 238U primary beam on a 2 mm 9Be target at the Radioactive Ion-Beam Factory (RIBF), RIKEN, Japan. The exotic nuclei were separated and identified event-by-event using the BigRIPS separator, with discrete energy gamma-ray decays from isomeric states with half-lives in the μs regime measured using the EURICA gamma-ray spectrometer. Metastable-state decays are identified in 165Tb and 167Tb and interpreted as arising from hindered E1 decay from the 7/2 - [523] single quasi-proton Nilsson configuration to rotational states built on the 3/2 - [411] single quasi-proton ground state. These data correspond to the first spectroscopic information in the heaviest, odd-A terbium isotopes reported to date and provide information on proton Nilsson configurations which reside close to the Fermi surface as the 170Dy doubly-midshell nucleus is approached.

UR - http://www.scopus.com/inward/record.url?scp=85017093456&partnerID=8YFLogxK

U2 - 10.5506/APhysPolB.48.601

DO - 10.5506/APhysPolB.48.601

M3 - Article

AN - SCOPUS:85017093456

SN - 0587-4254

VL - 48

SP - 601

EP - 608

JO - Acta Physica Polonica B

JF - Acta Physica Polonica B

IS - 3

ER -

Isomer spectroscopy of neutron-rich ^165,167Tb

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