94β -Decay Half-Lives of Neutron-Rich Cs55 to Ho67 : Experimental Feedback and Evaluation of the r -Process Rare-Earth Peak Formation

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

doi:10.1103/PhysRevLett.118.072701

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

Journal Article · Wed Feb 15 23:00:00 EST 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.072701· OSTI ID:1351228

Wu, J. ^[1]; Nishimura, S. ^[2]; Lorusso, G. ^[3]; ^[4]; Ideguchi, E. ^[5]; Regan, P. -H. ^[6]; Simpson, G. S. ^[7]; Söderström, P. -A. ^[2]; Walker, P. M. ^[8]; Watanabe, H. ^[9]; Xu, Z. Y. ^[10]; Baba, H. ^[2]; Browne, F. ^[11]; Daido, R. ^[12]; Doornenbal, P. ^[2]; Fang, Y. F. ^[12]; Gey, G. ^[13]; Isobe, T. ^[2]; Lee, P. S. ^[14]; Liu, J. J. ^[15] more »

Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics; RIKEN, Saitama (Japan). Nishina Center
RIKEN, Saitama (Japan). Nishina Center
RIKEN, Saitama (Japan). Nishina Center; National Physical Lab. (NPL), Teddington, Middlesex (United Kingdom); Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Osaka Univ. (Japan). Research Center for Nuclear Physics (RCNP)
National Physical Lab. (NPL), Teddington, Middlesex (United Kingdom); Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
Univ. Joseph Fourier Grenoble (France). Inst. National Polytechnique de Grenoble, Lab. de Physique Subatomique & Cosmologie (LPSC); Univ. of the West of Scotland, Paisley (United Kingdom). School of Engineering; Univ. of Glasgow, Scotland (United Kingdom)
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
Beihang Univ., Beijing (China). School of Physics and Nuclear Energy Engineering; RIKEN, Saitama (Japan). Nishina Center
Univ. of Hong Kong (China). Dept. of Physics; Univ. of Tokyo (Japan). Dept. of Physics
Univ. of Brighton (United Kingdom). School of Computing, Engineering and Mathematics; RIKEN, Saitama (Japan). Nishina Center
Osaka Univ. (Japan). Dept. of Physics
Univ. Joseph Fourier Grenoble (France). Inst. National Polytechnique de Grenoble, Lab. de Physique Subatomique & Cosmologie (LPSC); Inst. Laue-Langevin (ILL), Grenoble (France); RIKEN, Saitama (Japan). Nishina Center
Chung-Ang Univ., Seoul (Korea, Republic of). Dept. of Physics
Univ. of Hong Kong (China). Dept. of Physics
Peking Univ., Beijing (China). School of Physics, State Key Lab. of Nuclear Physics
Hungarian Academy of Sciences, Debrecen (Hungary). Inst. for Nuclear Research
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics; RIKEN, Saitama (Japan). Nishina Center
Vietnam National Univ., Hanoi (Vietnam). Hanoi Univ. of Science, Faculty of Physics; RIKEN, Saitama (Japan). Nishina Center
RIKEN, Saitama (Japan). Nishina Center; Univ. of Tokyo (Japan). Dept. of Physics
Univ. of York (United Kingdom). Dept. of Physics; RIKEN, Saitama (Japan). Nishina Center
Univ. of Tokyo, Wako-shi (Japan). Center for Nuclear Study (CNS)
Beihang Univ., Beijing (China). School of Physics and Nuclear Energy Engineering
Almajmaah Univ. (Saudi Arabia). College of Science in Zulfi, Dept. of Physics
Univ. of Oslo (Norway)
Istituto Nazionale di Fisica Nucleare (INFN), Milano (Italy)
Univ. of Brighton (United Kingdom). School of Computing, Engineering and Mathematics
Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
Univ. of Edinburgh, Scotland (United Kingdom). School of Physics and Astronomy
Univ. degli Studi di Padova (Italy). Dipartimento di Fisica; National Inst. of Nuclear Physics (INFN), Legnaro (Italy). National Lab. of Legnaro (INFN-LNL)
GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
Australian National Univ., Canberra, ACT (Australia). Research School of Physical Sciences and Engineering, Dept. of Nuclear Physics
Hoseo Univ., Asan (Korea)
Tohoku Univ., Sendai (Japan). Dept. of Physics
Univ. of Brighton (United Kingdom). School of Computing, Engineering and Mathematics; Horia Hulubei National Inst. of Physics and Nuclear Engineering, Bucharest (Romania)
Univ. College Dublin (Ireland). School of Physics
Univ. Autonoma de Madrid (Spain). Dept. de Fisica Teorica; Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain). Inst. de Estructura de la Materia

The β-decay half-lives of 94 neutron-rich nuclei ^{144 $$-$$ 151}Cs, ^{146 $$-$$ 154}Ba, ^{148 $$-$$ 156}La, 1^{50 $$-$$ 158}Ce, ^{153 $$-$$160}Pr, 156 $$-$$ 162 Nd, ^{159 $$-$$ 163}Pm, ^{160 $$-$$ 166}Sm, ^{161 $$-$$ 168}Eu , ^{165 $$-$$ 170}Gd, ^{166 $$-$$ 172}Tb, ^{169 $$-$$ 173}Dy, ^{172 $$-$$ 175}Ho, and two isomeric states ^{174 m}Er, ^{172 m}Dy 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 ₅₈Ce, ₅₉Pr, ₆₀Nd , and ₆₂Sm, and N = 105 for ₆₃Eu, ₆₄Gd, ₆₅Tb, and ₆₆Dy. Features in the data mirror the interplay between pairing effects and microscopic structure. In conclusion, $$r$$-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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Research Foundation (NRF) of Korea; Ministry of Education, Science, and Technology (MEST) of Korea; UK Science and Technology Facilities Council

Grant/Contract Number:: AC52-06NA25396; AC02-06CH11357

OSTI ID:: 1351228

Alternate ID(s):: OSTI ID: 1344138
OSTI ID: 1345511

Report Number(s):: LA-UR-16-27574

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 118; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (43)

Nuclear Properties for Astrophysical and Radioactive-Ion-Beam Applications MÖLler, P.; Nix, J. R.; Kratz, K. -L. Atomic Data and Nuclear Data Tables, Vol. 66, Issue 2 https://doi.org/10.1006/adnd.1997.0746	journal	July 1997
r-Process abundance universality and actinide cosmochronology Otsuki, Kaori; Mathews, Grant J.; Kajino, Toshitaka New Astronomy, Vol. 8, Issue 8 https://doi.org/10.1016/S1384-1076(03)00065-4	journal	November 2003
Synthesis of Superheavy Elements in the r-Process Viola, Jr., V. E.; Mathews, G. J. Superheavy Elements https://doi.org/10.1016/b978-0-08-022946-1.50060-8	book	January 1978
Installation and commissioning of EURICA – Euroball-RIKEN Cluster Array Söderström, P. -A.; Nishimura, S.; Doornenbal, P. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 317 https://doi.org/10.1016/j.nimb.2013.03.018	journal	December 2013
Identification and separation of radioactive isotope beams by the BigRIPS separator at the RIKEN RI Beam Factory Fukuda, N.; Kubo, T.; Ohnishi, T. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 317 https://doi.org/10.1016/j.nimb.2013.08.048	journal	December 2013
The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries Arnould, M.; Goriely, S.; Takahashi, K. Physics Reports, Vol. 450, Issue 4-6 https://doi.org/10.1016/j.physrep.2007.06.002	journal	September 2007
Synthesis of Superheavy Elements in the r-Process Schramm, David N.; Fowler, William A. Nature, Vol. 231, Issue 5298 https://doi.org/10.1038/231103a0	journal	May 1971
New insights into the astrophysical r-process Mathews, G. J.; Cowan, J. J. Nature, Vol. 345, Issue 6275 https://doi.org/10.1038/345491a0	journal	June 1990
β -decay half-lives of neutron-rich nuclei around ¹⁵⁸ Nd, relevant to the formation of the A≈165 rare-earth element peak Wu, J.; Nishimura, S.; Lorusso, G. EPJ Web of Conferences, Vol. 109 https://doi.org/10.1051/epjconf/201610908003	journal	January 2016
Sensitivity studies for the main r process: β-decay rates Mumpower, M.; Cass, J.; Passucci, G. AIP Advances, Vol. 4, Issue 4 https://doi.org/10.1063/1.4867192	journal	April 2014
β-decay spectroscopy at RIBF: The EURICA project Lorusso, G.; Nishimura, S.; Baba, H. ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2013: Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG12), AIP Conference Proceedings https://doi.org/10.1063/1.4874097	conference	January 2014
β-decay of neutron-rich Z∼60 nuclei and the origin of rare earth elements Wu, J.; Nishimura, S.; Lorusso, G. ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2013: Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG12), AIP Conference Proceedings https://doi.org/10.1063/1.4874099	conference	January 2014
Status and results from the decay spectroscopy project EURICA (Euroball-RIKEN cluster array) Söderström, P. -A.; Doornenbal, P.; Lorusso, G. THERMOPHYSICS 2016: 21st International Meeting, AIP Conference Proceedings https://doi.org/10.1063/1.4955364	conference	January 2016
NEW HUBBLE SPACE TELESCOPE OBSERVATIONS OF HEAVY ELEMENTS IN FOUR METAL-POOR STARS Roederer, Ian U.; Lawler, James E.; Sobeck, Jennifer S. The Astrophysical Journal Supplement Series, Vol. 203, Issue 2 https://doi.org/10.1088/0067-0049/203/2/27	journal	November 2012
The Ame2012 atomic mass evaluation Audi, G.; Wang, M.; Wapstra, A. H. Chinese Physics C, Vol. 36, Issue 12 https://doi.org/10.1088/1674-1137/36/12/002	journal	December 2012
The Ame2012 atomic mass evaluation Wang, M.; Audi, G.; Wapstra, A. H. Chinese Physics C, Vol. 36, Issue 12 https://doi.org/10.1088/1674-1137/36/12/003	journal	December 2012
Beta-gamma spectroscopy at RIBF Nishimura, Shunji Progress of Theoretical and Experimental Physics, Vol. 2012, Issue 1 https://doi.org/10.1093/ptep/pts078	journal	January 2012
New calculations of gross β -decay properties for astrophysical applications: Speeding-up the classical r process Möller, Peter; Pfeiffer, Bernd; Kratz, Karl-Ludwig Physical Review C, Vol. 67, Issue 5 https://doi.org/10.1103/PhysRevC.67.055802	journal	May 2003
Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. VII. Simultaneous fits to masses and fission barriers Goriely, S.; Samyn, M.; Pearson, J. M. Physical Review C, Vol. 75, Issue 6 https://doi.org/10.1103/PhysRevC.75.064312	journal	June 2007
Formation of the rare-earth peak: Gaining insight into late-time r -process dynamics Mumpower, Matthew R.; McLaughlin, G. C.; Surman, Rebecca Physical Review C, Vol. 85, Issue 4 https://doi.org/10.1103/PhysRevC.85.045801	journal	April 2012
Influence of neutron capture rates in the rare earth region on the r -process abundance pattern Mumpower, Matthew R.; McLaughlin, Gail C.; Surman, Rebecca Physical Review C, Vol. 86, Issue 3 https://doi.org/10.1103/PhysRevC.86.035803	journal	September 2012
Large-scale evaluation of β -decay rates of r -process nuclei with the inclusion of first-forbidden transitions Marketin, T.; Huther, L.; Martínez-Pinedo, G. Physical Review C, Vol. 93, Issue 2 https://doi.org/10.1103/PhysRevC.93.025805	journal	February 2016
β -Decay Half-Lives of Very Neutron-Rich Kr to Tc Isotopes on the Boundary of the r -Process Path: An Indication of Fast r -Matter Flow Nishimura, S.; Li, Z.; Watanabe, H. Physical Review Letters, Vol. 106, Issue 5 https://doi.org/10.1103/PhysRevLett.106.052502	journal	February 2011
New Fission Fragment Distributions and r -Process Origin of the Rare-Earth Elements Goriely, S.; Sida, J. -L.; Lemaître, J. -F. Physical Review Letters, Vol. 111, Issue 24 https://doi.org/10.1103/PhysRevLett.111.242502	journal	December 2013
β -Decay Half-Lives of Co 76 , 77 , Ni 79 , 80 , and Cu 81 : Experimental Indication of a Doubly Magic Ni 78 Xu, Z. Y.; Nishimura, S.; Lorusso, G. Physical Review Letters, Vol. 113, Issue 3 https://doi.org/10.1103/PhysRevLett.113.032505	journal	July 2014
Isomer Decay Spectroscopy of Sm 164 and Gd 166 : Midshell Collectivity Around N = 100 Patel, Z.; Söderström, P. -A.; Podolyák, Zs. Physical Review Letters, Vol. 113, Issue 26 https://doi.org/10.1103/PhysRevLett.113.262502	journal	December 2014
β -Decay Half-Lives of 110 Neutron-Rich Nuclei across the N = 82 Shell Gap: Implications for the Mechanism and Universality of the Astrophysical r Process Lorusso, G.; Nishimura, S.; Xu, Z. Y. Physical Review Letters, Vol. 114, Issue 19 https://doi.org/10.1103/PhysRevLett.114.192501	journal	May 2015
Source of the Rare-Earth Element Peak in r -Process Nucleosynthesis Surman, Rebecca; Engel, Jonathan; Bennett, Jonathan R. Physical Review Letters, Vol. 79, Issue 10 https://doi.org/10.1103/PhysRevLett.79.1809	journal	September 1997
Synthesis of the Elements in Stars Burbidge, E. Margaret; Burbidge, G. R.; Fowler, William A. Reviews of Modern Physics, Vol. 29, Issue 4 https://doi.org/10.1103/RevModPhys.29.547	journal	October 1957
Nuclidic Mass Formula on a Spherical Basis with an Improved Even-Odd Term Koura, H.; Tachibana, T.; Uno, M. Progress of Theoretical Physics, Vol. 113, Issue 2 https://doi.org/10.1143/PTP.113.305	journal	February 2005
Improvement of the Gross Theory of -Decay. II: One-Particle Strength Function Tachibana, T.; Yamada, M.; Yoshida, Y. Progress of Theoretical Physics, Vol. 84, Issue 4 https://doi.org/10.1143/ptp/84.4.641	journal	October 1990
THE LINK BETWEEN RARE-EARTH PEAK FORMATION AND THE ASTROPHYSICAL SITE OF THE R PROCESS Mumpower, Matthew R.; McLaughlin, Gail C.; Surman, Rebecca The Astrophysical Journal, Vol. 833, Issue 2 https://doi.org/10.3847/1538-4357/833/2/282	journal	December 2016
The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries Arnould, M.; Goriely, S.; Takahashi, K. arXiv https://doi.org/10.48550/arxiv.0705.4512	text	January 2007
Formation Of The Rare Earth Peak: Gaining Insight Into Late-Time r-Process Dynamics Mumpower, Matthew; McLaughlin, Gail; Surman, Rebecca arXiv https://doi.org/10.48550/arxiv.1109.3613	text	January 2011
The Influence Of Neutron Capture Rates On The Rare Earth Region Of The r-Process Abundance Pattern Mumpower, M. R.; McLaughlin, G. C.; Surman, R. A. arXiv https://doi.org/10.48550/arxiv.1204.0437	text	January 2012
New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars Roederer, Ian U.; Lawler, James E.; Sobeck, Jennifer S. arXiv https://doi.org/10.48550/arxiv.1210.6387	text	January 2012
Identification and Separation of Radioactive Isotope Beams by the BigRIPS Separator at the RIKEN RI Beam Factory Fukuda, N.; Kubo, T.; Ohnishi, T. arXiv https://doi.org/10.48550/arxiv.1310.8351	text	January 2013
New fission fragment distributions and r-process origin of the rare-earth elements Goriely, S.; Sida, J. -L.; Lemaitre, J. -F. arXiv https://doi.org/10.48550/arxiv.1311.5897	text	January 2013
The link between rare earth peak formation and the astrophysical site of the $r$ process Mumpower, M. R.; McLaughlin, G. C.; Surman, R. arXiv https://doi.org/10.48550/arxiv.1603.02600	text	January 2016
r-Process Abundance Universality and Actinide Cosmochronology Otsuki, Kaori; Mathews, Grant J.; Kajino, Toshitaka arXiv https://doi.org/10.48550/arxiv.astro-ph/0207596	text	January 2002
First Results on the Excited States in $^{77}$Cu Sahin, E.; Bello Garrote, F. L.; Görgen, A. Acta Physica Polonica B, Vol. 47, Issue 3 https://doi.org/10.5506/APhysPolB.47.889	journal	January 2016
Status of the EURICA Project After One Year at RIKEN Söderström, Pär-Anders; Nishimura, Shunji; Baba, Hidetada Proceedings of the 12th Asia Pacific Physics Conference (APPC12) https://doi.org/10.7566/JPSCP.1.013046	conference	March 2014
β-Decay of Neutron-Rich Nuclei around 158 Nd and the Origin of Rare-Earth Elements Wu, J.; Nishimura, S.; Lorusso, G. Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014) https://doi.org/10.7566/JPSCP.6.030064	conference	June 2015

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Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP Vilen, M.; Kelly, J. M.; Kankainen, A. Physical Review C, Vol. 101, Issue 3 https://doi.org/10.1103/physrevc.101.034312	journal	March 2020
β -decay properties of neutron-rich Ca, Ti, and Cr isotopes Sarriguren, P.; Algora, A.; Kiss, G. Physical Review C, Vol. 98, Issue 2 https://doi.org/10.1103/physrevc.98.024311	journal	August 2018
Masses and β -Decay Spectroscopy of Neutron-Rich Odd-Odd Eu 160 , 162 Nuclei: Evidence for a Subshell Gap with Large Deformation at N = 98 Hartley, D. J.; Kondev, F. G.; Orford, R. Physical Review Letters, Vol. 120, Issue 18 https://doi.org/10.1103/physrevlett.120.182502	journal	May 2018
Precision Mass Measurements on Neutron-Rich Rare-Earth Isotopes at JYFLTRAP: Reduced Neutron Pairing and Implications for r -Process Calculations Vilen, M.; Kelly, J. M.; Kankainen, A. Physical Review Letters, Vol. 120, Issue 26 https://doi.org/10.1103/physrevlett.120.262701	journal	June 2018
Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation Orford, R.; Vassh, N.; Clark, J. A. Physical Review Letters, Vol. 120, Issue 26 https://doi.org/10.1103/physrevlett.120.262702	journal	June 2018
2018 update of the discoveries of nuclides Thoennessen, M. International Journal of Modern Physics E, Vol. 28, Issue 01n02 https://doi.org/10.1142/s0218301319300029	journal	February 2019
Precision mass measurements on neutron-rich rare-earth isotopes at JYFLTRAP - reduced neutron pairing and implications for the $r$-process calculations Vilen, M.; Kelly, J. M.; Kankainen, A. arXiv https://doi.org/10.48550/arxiv.1801.08940	text	January 2018
Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP Vilen, M.; Kelly, J. M.; Kankainen, A. arXiv https://doi.org/10.48550/arxiv.1908.05043	text	January 2019

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