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94 beta decay half-lives of neutron-rich Cs-55 to Ho-67: experimental feedback and evaluation of the r-process rare-earth peak formation.

Wu, J*; Nishimura, S*; Lorusso, G; Moller, P*; Ideguchi, E*; Regan, P H; Simpson, G S*; Soderstrom, 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*; Garrote, F L B*; 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*; Lalkobski, S*; Lane, G J*; Lee, E J*; Lokotko, T*; Lotay, G*; Moon, C B*; Nishizuka, I*; Nita, C R*; Odahara, A*; Podolyak, Z*; Roberts, O J*; Schaffner, H*; Shand, C*; Taprogge, J*; Terashima, S*; Vajta, Z*; Yoshida, S* (2017) 94 beta decay half-lives of neutron-rich Cs-55 to Ho-67: experimental feedback and evaluation of the r-process rare-earth peak formation. Phys. Rev. Lett., 118 (7). 072701

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Abstract

the beta-decay half-lives of 94 neutron-rich nuclei 144-151Cs; 146-155Ba; 148-156La; 150-158Ce; 153-160Pr; 156-162Nd; 159-163Pm; 160-166Sm; 161-168eu; 165-170Gd, 166-172Tb; 169-173Dy; 172-175Ho, and 2 isomeric states 174mEr and 172mDy were measured at the Radioactive Isotope Beam Factory providing a new experimental basis to test theoetical models. Strikingl large drops of beta-decay half-lives are observed at neutron-number N=97 for Ce, Pr, Nd and Sm and N=105 for eu, Gd, Tb and Dy.

Item Type: Article
Keywords: Nuclear decay, radiaoctive half-life measurement, new isotope identificiation, nuclear data
Subjects: Ionising Radiation
Ionising Radiation > Radioactivity
Divisions: Chemical, Medical & Environmental Science
Identification number/DOI: 10.1103/PhysRevLett.118.072701
Last Modified: 09 Feb 2018 13:39
URI: http://eprintspublications.npl.co.uk/id/eprint/7427

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