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

Wu, J, Nishimura, S, Lorusso, G, Moller, P, Ideguchi, E, Regan, Patrick, Simpson, GS, Soderstrom, P-A, Walker, Philip, 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, Gavin, Moon, C-B, Nishibata, H, Nishizuka, I, Nita, CR, Odahara, A, Podolyak, Zsolt, Roberts, OJ, Schaffner, H, Shand, Callum, Taprogge, J, Terashima, S, Vajta, Z and Yoshida, S (2017) 94 -Decay Half-lives of Neutron-Rich 55Cs to 67Ho: Experimental Feedback and Evaluation of the r-Process Rare-Earth Peak Formation Physical Review Letters, 118 (7), 072701.

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Abstract

The -decay half-lives of 94 neutron-rich nuclei 144−151Cs, 146−154Ba, 148−156La, 150−158Ce, 153−160Pr, 156−162Nd, 159−163Pm, 160−166Sm, 161−168Eu, 165−170Gd, 166−172Tb, 169−173Dy, 172−175Ho and two isomeric states 174mEr, 172mDy were measured at Radioactive Isotope Beam Factory (RIBF), providing a new experimental basis to test theoretical models. Striking, large drops of -decay half-lives are observed at neutron-number N = 97 for 58Ce, 59Pr, 60Nd, 62Sm, and N = 105 for 63Eu, 64Gd, 65Tb, 66Dy. 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.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Wu, JUNSPECIFIEDUNSPECIFIED
Nishimura, SUNSPECIFIEDUNSPECIFIED
Lorusso, GUNSPECIFIEDUNSPECIFIED
Moller, PUNSPECIFIEDUNSPECIFIED
Ideguchi, EUNSPECIFIEDUNSPECIFIED
Regan, PatrickP.Regan@surrey.ac.ukUNSPECIFIED
Simpson, GSUNSPECIFIEDUNSPECIFIED
Soderstrom, P-AUNSPECIFIEDUNSPECIFIED
Walker, PhilipP.Walker@surrey.ac.ukUNSPECIFIED
Watanabe, HUNSPECIFIEDUNSPECIFIED
Xu, ZYUNSPECIFIEDUNSPECIFIED
Baba, HUNSPECIFIEDUNSPECIFIED
Browne, FUNSPECIFIEDUNSPECIFIED
Daido, RUNSPECIFIEDUNSPECIFIED
Doornenbal, PUNSPECIFIEDUNSPECIFIED
Fang, YFUNSPECIFIEDUNSPECIFIED
Gey, GUNSPECIFIEDUNSPECIFIED
Isobe, TUNSPECIFIEDUNSPECIFIED
Lee, PSUNSPECIFIEDUNSPECIFIED
Liu, JJUNSPECIFIEDUNSPECIFIED
Li, ZUNSPECIFIEDUNSPECIFIED
Korkulu, ZUNSPECIFIEDUNSPECIFIED
Patel, ZUNSPECIFIEDUNSPECIFIED
Phong, VUNSPECIFIEDUNSPECIFIED
Rice, SUNSPECIFIEDUNSPECIFIED
Sakurai, HUNSPECIFIEDUNSPECIFIED
Sinclair, LUNSPECIFIEDUNSPECIFIED
Sumikama, TUNSPECIFIEDUNSPECIFIED
Tanaka, MUNSPECIFIEDUNSPECIFIED
Yagi, AUNSPECIFIEDUNSPECIFIED
Ye, YLUNSPECIFIEDUNSPECIFIED
Yokoyama, RUNSPECIFIEDUNSPECIFIED
Zhang, GXUNSPECIFIEDUNSPECIFIED
Alharbi, TUNSPECIFIEDUNSPECIFIED
Aoi, NUNSPECIFIEDUNSPECIFIED
Bello Garrote, FLUNSPECIFIEDUNSPECIFIED
Benzoni, GUNSPECIFIEDUNSPECIFIED
Bruce, AMUNSPECIFIEDUNSPECIFIED
Carroll, RJUNSPECIFIEDUNSPECIFIED
Chae, KYUNSPECIFIEDUNSPECIFIED
Dombradi, ZUNSPECIFIEDUNSPECIFIED
Estrade, AUNSPECIFIEDUNSPECIFIED
Gottardo, AUNSPECIFIEDUNSPECIFIED
Griffin, CJUNSPECIFIEDUNSPECIFIED
Kanaoka, HUNSPECIFIEDUNSPECIFIED
Kojouharov, IUNSPECIFIEDUNSPECIFIED
Kondev, FGUNSPECIFIEDUNSPECIFIED
Kubono, SUNSPECIFIEDUNSPECIFIED
Kurz, NUNSPECIFIEDUNSPECIFIED
Kuti, IUNSPECIFIEDUNSPECIFIED
Lalkovski, SUNSPECIFIEDUNSPECIFIED
Lane, GJUNSPECIFIEDUNSPECIFIED
Lee, EJUNSPECIFIEDUNSPECIFIED
Lokotko, TUNSPECIFIEDUNSPECIFIED
Lotay, Gaving.lotay@surrey.ac.ukUNSPECIFIED
Moon, C-BUNSPECIFIEDUNSPECIFIED
Nishibata, HUNSPECIFIEDUNSPECIFIED
Nishizuka, IUNSPECIFIEDUNSPECIFIED
Nita, CRUNSPECIFIEDUNSPECIFIED
Odahara, AUNSPECIFIEDUNSPECIFIED
Podolyak, ZsoltZ.Podolyak@surrey.ac.ukUNSPECIFIED
Roberts, OJUNSPECIFIEDUNSPECIFIED
Schaffner, HUNSPECIFIEDUNSPECIFIED
Shand, Callumc.shand@surrey.ac.ukUNSPECIFIED
Taprogge, JUNSPECIFIEDUNSPECIFIED
Terashima, SUNSPECIFIEDUNSPECIFIED
Vajta, ZUNSPECIFIEDUNSPECIFIED
Yoshida, SUNSPECIFIEDUNSPECIFIED
Date : 16 February 2017
Identification Number : 10.1103/PhysRevLett.118.072701
Copyright Disclaimer : Copyright 2017 American Physical Society
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 31 Jan 2017 18:17
Last Modified : 07 Jul 2017 10:22
URI: http://epubs.surrey.ac.uk/id/eprint/813417

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