94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation

J. Wu; S. Nishimura; G. Lorusso; P. Möller; E. Ideguchi; P. H. Regan; G. S. Simpson; P. A. Söderström; P. M. Walker; H. Watanabe; Z. Y. Xu; H. Baba; F. Browne; R. Daido; P. Doornenbal; Y. F. Fang; G. Gey; T. Isobe; P. S. Lee; J. J. Liu; Z. Li; Z. Korkulu; Z. Patel; V. Phong; S. Rice; H. Sakurai; L. Sinclair; T. Sumikama; M. Tanaka; A. Yagi; Y. L. Ye; R. Yokoyama; G. X. Zhang; T. Alharbi; N. Aoi; F. L. Bello Garrote; G. Benzoni; A. M. Bruce; R. J. Carroll; K. Y. Chae; Z. Dombradi; A. Estrade; A. Gottardo; C. J. Griffin; H. Kanaoka; I. Kojouharov; F. G. Kondev; S. Kubono; N. Kurz; I. Kuti; S. Lalkovski; G. J. Lane; E. J. Lee; T. Lokotko; G. Lotay; C. B. Moon; H. Nishibata; I. Nishizuka; C. R. Nita; A. Odahara; Zs Podolyák; O. J. Roberts; H. Schaffner; C. Shand; J. Taprogge; S. Terashima; Z. Vajta; S. Yoshida

doi:10.1103/PhysRevLett.118.072701

94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation

J. Wu, S. Nishimura, G. Lorusso, P. Möller, E. Ideguchi, P. H. Regan, G. S. Simpson, P. A. Söderström, P. M. Walker, H. Watanabe, Z. Y. Xu, H. Baba, F. Browne, R. Daido, P. Doornenbal, Y. F. Fang, G. Gey, T. Isobe, P. S. Lee, J. J. LiuZ. Li, Z. Korkulu, Z. Patel, V. Phong, S. Rice, H. Sakurai, L. Sinclair, T. Sumikama, M. Tanaka, A. Yagi, Y. L. Ye, R. Yokoyama, G. X. Zhang, T. Alharbi, N. Aoi, F. L. Bello Garrote, G. Benzoni, A. M. Bruce, R. J. Carroll, K. Y. Chae, Z. Dombradi, A. Estrade, A. Gottardo, C. J. Griffin, H. Kanaoka, I. Kojouharov, F. G. Kondev, S. Kubono, N. Kurz, I. Kuti, S. Lalkovski, G. J. Lane, E. J. Lee, T. Lokotko, G. Lotay, C. B. Moon, H. Nishibata, I. Nishizuka, C. R. Nita, A. Odahara, Zs Podolyák, O. J. Roberts, H. Schaffner, C. Shand, J. Taprogge, S. Terashima, Z. Vajta, S. Yoshida

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Abstract

The β-decay half-lives of 94 neutron-rich nuclei Cs144-151, Ba146-154, La148-156, Ce150-158, Pr153-160, Nd156-162, Pm159-163, Sm160-166, Eu161-168, Gd165-170, Tb166-172, Dy169-173, Ho172-175, and two isomeric states Er174m, Dy172m were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for Ce58, Pr59, Nd60, and Sm62, and N=105 for Eu63, Gd64, Tb65, and Dy66. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.

Original language	English
Article number	072701
Journal	Physical review letters
Volume	118
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.118.072701
Publication status	Published - Feb 16 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.118.072701

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Wu, J., Nishimura, S., Lorusso, G., Möller, P., Ideguchi, E., Regan, P. H., Simpson, G. S., Söderström, P. A., Walker, P. M., Watanabe, H., Xu, Z. Y., Baba, H., Browne, F., Daido, R., Doornenbal, P., Fang, Y. F., Gey, G., Isobe, T., Lee, P. S., ... Yoshida, S. (2017). 94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation. Physical review letters, 118(7), Article 072701. https://doi.org/10.1103/PhysRevLett.118.072701

Wu, J, Nishimura, S, Lorusso, G, Möller, P, Ideguchi, E, Regan, PH, Simpson, GS, Söderström, PA, Walker, PM, Watanabe, H, Xu, ZY, Baba, H, Browne, F, Daido, R, Doornenbal, P, Fang, YF, Gey, G, Isobe, T, Lee, PS, Liu, JJ, Li, Z, Korkulu, Z, Patel, Z, Phong, V, Rice, S, Sakurai, H, Sinclair, L, Sumikama, T, Tanaka, M, Yagi, A, Ye, YL, Yokoyama, R, Zhang, GX, Alharbi, T, Aoi, N, Bello Garrote, FL, Benzoni, G, Bruce, AM, Carroll, RJ, Chae, KY, Dombradi, Z, Estrade, A, Gottardo, A, Griffin, CJ, Kanaoka, H, Kojouharov, I, Kondev, FG, Kubono, S, Kurz, N, Kuti, I, Lalkovski, S, Lane, GJ, Lee, EJ, Lokotko, T, Lotay, G, Moon, CB, Nishibata, H, Nishizuka, I, Nita, CR, Odahara, A, Podolyák, Z, Roberts, OJ, Schaffner, H, Shand, C, Taprogge, J, Terashima, S, Vajta, Z & Yoshida, S 2017, '94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation', Physical review letters, vol. 118, no. 7, 072701. https://doi.org/10.1103/PhysRevLett.118.072701

@article{6902ab91a99148b2a39e78af2fee322d,

title = "94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation",

abstract = "The β-decay half-lives of 94 neutron-rich nuclei Cs144-151, Ba146-154, La148-156, Ce150-158, Pr153-160, Nd156-162, Pm159-163, Sm160-166, Eu161-168, Gd165-170, Tb166-172, Dy169-173, Ho172-175, and two isomeric states Er174m, Dy172m were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for Ce58, Pr59, Nd60, and Sm62, and N=105 for Eu63, Gd64, Tb65, and Dy66. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.",

author = "J. Wu and S. Nishimura and G. Lorusso and P. M{\"o}ller and E. Ideguchi and Regan, {P. H.} and Simpson, {G. S.} and S{\"o}derstr{\"o}m, {P. A.} and Walker, {P. M.} and H. Watanabe and Xu, {Z. Y.} and H. Baba and F. Browne and R. Daido and P. Doornenbal and Fang, {Y. F.} and G. Gey and T. Isobe and Lee, {P. S.} and Liu, {J. J.} and Z. Li and Z. Korkulu and Z. Patel and V. Phong and S. Rice and H. Sakurai and L. Sinclair and T. Sumikama and M. Tanaka and A. Yagi and Ye, {Y. L.} and R. Yokoyama and Zhang, {G. X.} and T. Alharbi and N. Aoi and {Bello Garrote}, {F. L.} and G. Benzoni and Bruce, {A. M.} and Carroll, {R. J.} and Chae, {K. Y.} and Z. Dombradi and A. Estrade and A. Gottardo and Griffin, {C. J.} and H. Kanaoka and I. Kojouharov and Kondev, {F. G.} and S. Kubono and N. Kurz and I. Kuti and S. Lalkovski and Lane, {G. J.} and Lee, {E. J.} and T. Lokotko and G. Lotay and Moon, {C. B.} and H. Nishibata and I. Nishizuka and Nita, {C. R.} and A. Odahara and Zs Podoly{\'a}k and Roberts, {O. J.} and H. Schaffner and C. Shand and J. Taprogge and S. Terashima and Z. Vajta and S. Yoshida",

note = "Funding Information: This work was carried out at the RIBF operated by RIKEN Nishina Center, RIKEN and RCNP, Osaka University. The authors acknowledge discussion with Dr. Furong Xu, Dr. Haozhao Liang, and Dr. Kenichi Yoshida. We also acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of the cluster detectors. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by the Ministry of Education, Science, and Technology (MEST) and National Research Foundation (NRF) of Korea (2013M7A1A1075764). This work was partially supported by KAKENHI (Grants No.25247045), the RIKEN Foreign Research Program, the Spanish Ministerio de Ciencia e Innovacin (Contracts No.FPA2009-13377-C02 and No.FPA2011-29854-C04), the UK Science and Technology Facilities Council, the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, Contract No.DE-AC02-06CH11357, under the auspices of the NNSA of the U.S. DOE at Los Alamos National Laboratory under Contract No.DEAC52-06NA25396, the NASA Grant No.NNX10AH78G, the National Research Foundation Grant funded by the Korean Government (Grants No.NRF-2009-0093817, No.NRF-2015R1D1A1A01056918, No.NRF-2016R1A5A1013277, and No.NRF-2013R1A1A2063017), and the Hungarian Scientific Research Fund OTKA Contract No.K100835. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = feb,

day = "16",

doi = "10.1103/PhysRevLett.118.072701",

language = "English",

volume = "118",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "7",

}

TY - JOUR

T1 - 94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67

T2 - Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation

AU - Wu, J.

AU - Nishimura, S.

AU - Lorusso, G.

AU - Möller, P.

AU - Ideguchi, E.

AU - Regan, P. H.

AU - Simpson, G. S.

AU - Söderström, P. A.

AU - Walker, P. M.

AU - Watanabe, H.

AU - Xu, Z. Y.

AU - Baba, H.

AU - Browne, F.

AU - Daido, R.

AU - Doornenbal, P.

AU - Fang, Y. F.

AU - Gey, G.

AU - Isobe, T.

AU - Lee, P. S.

AU - Liu, J. J.

AU - Li, Z.

AU - Korkulu, Z.

AU - Patel, Z.

AU - Phong, V.

AU - Rice, S.

AU - Sakurai, H.

AU - Sinclair, L.

AU - Sumikama, T.

AU - Tanaka, M.

AU - Yagi, A.

AU - Ye, Y. L.

AU - Yokoyama, R.

AU - Zhang, G. X.

AU - Alharbi, T.

AU - Aoi, N.

AU - Bello Garrote, F. L.

AU - Benzoni, G.

AU - Bruce, A. M.

AU - Carroll, R. J.

AU - Chae, K. Y.

AU - Dombradi, Z.

AU - Estrade, A.

AU - Gottardo, A.

AU - Griffin, C. J.

AU - Kanaoka, H.

AU - Kojouharov, I.

AU - Kondev, F. G.

AU - Kubono, S.

AU - Kurz, N.

AU - Kuti, I.

AU - Lalkovski, S.

AU - Lane, G. J.

AU - Lee, E. J.

AU - Lokotko, T.

AU - Lotay, G.

AU - Moon, C. B.

AU - Nishibata, H.

AU - Nishizuka, I.

AU - Nita, C. R.

AU - Odahara, A.

AU - Podolyák, Zs

AU - Roberts, O. J.

AU - Schaffner, H.

AU - Shand, C.

AU - Taprogge, J.

AU - Terashima, S.

AU - Vajta, Z.

AU - Yoshida, S.

N1 - Funding Information: This work was carried out at the RIBF operated by RIKEN Nishina Center, RIKEN and RCNP, Osaka University. The authors acknowledge discussion with Dr. Furong Xu, Dr. Haozhao Liang, and Dr. Kenichi Yoshida. We also acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of the cluster detectors. Part of the WAS3ABi was supported by the Rare Isotope Science Project which is funded by the Ministry of Education, Science, and Technology (MEST) and National Research Foundation (NRF) of Korea (2013M7A1A1075764). This work was partially supported by KAKENHI (Grants No.25247045), the RIKEN Foreign Research Program, the Spanish Ministerio de Ciencia e Innovacin (Contracts No.FPA2009-13377-C02 and No.FPA2011-29854-C04), the UK Science and Technology Facilities Council, the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, Contract No.DE-AC02-06CH11357, under the auspices of the NNSA of the U.S. DOE at Los Alamos National Laboratory under Contract No.DEAC52-06NA25396, the NASA Grant No.NNX10AH78G, the National Research Foundation Grant funded by the Korean Government (Grants No.NRF-2009-0093817, No.NRF-2015R1D1A1A01056918, No.NRF-2016R1A5A1013277, and No.NRF-2013R1A1A2063017), and the Hungarian Scientific Research Fund OTKA Contract No.K100835. Publisher Copyright: © 2017 American Physical Society.

PY - 2017/2/16

Y1 - 2017/2/16

N2 - The β-decay half-lives of 94 neutron-rich nuclei Cs144-151, Ba146-154, La148-156, Ce150-158, Pr153-160, Nd156-162, Pm159-163, Sm160-166, Eu161-168, Gd165-170, Tb166-172, Dy169-173, Ho172-175, and two isomeric states Er174m, Dy172m were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for Ce58, Pr59, Nd60, and Sm62, and N=105 for Eu63, Gd64, Tb65, and Dy66. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.

AB - The β-decay half-lives of 94 neutron-rich nuclei Cs144-151, Ba146-154, La148-156, Ce150-158, Pr153-160, Nd156-162, Pm159-163, Sm160-166, Eu161-168, Gd165-170, Tb166-172, Dy169-173, Ho172-175, and two isomeric states Er174m, Dy172m were measured at the Radioactive Isotope Beam Factory, providing a new experimental basis to test theoretical models. Strikingly large drops of β-decay half-lives are observed at neutron-number N=97 for Ce58, Pr59, Nd60, and Sm62, and N=105 for Eu63, Gd64, Tb65, and Dy66. Features in the data mirror the interplay between pairing effects and microscopic structure. r-process network calculations performed for a range of mass models and astrophysical conditions show that the 57 half-lives measured for the first time play an important role in shaping the abundance pattern of rare-earth elements in the solar system.

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UR - http://www.scopus.com/inward/citedby.url?scp=85013487527&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.118.072701

DO - 10.1103/PhysRevLett.118.072701

M3 - Article

C2 - 28256889

AN - SCOPUS:85013487527

SN - 0031-9007

VL - 118

JO - Physical review letters

JF - Physical review letters

IS - 7

M1 - 072701

ER -

94 β -Decay Half-Lives of Neutron-Rich Cs 55 to Ho 67: Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation

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