Details

Autor(en) / Beteiligte

• 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.
• Fukuda, N.
• Gey, G.
• Isobe, T.
• Korkulu, Z.
• Lee, P. S.
• Liu, J. J.
• Li, 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.
• Ahn, D. S.
• 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.
• Inabe, N.
• Kameda, D.
• Kanaoka, H.
• Kojouharov, I.
• Kondev, F. G.
• Kubo, T.
• Kubono, S.
• Kurz, N.
• Kuti, I.
• Lalkovski, S.
• Lane, G. J.
• Lee, E. J.
• Lokotko, T.
• Lotay, G.
• Moon, C.-B.
• Murai, D.
• Nishibata, H.
• Nishizuka, I.
• Nita, C. R.
• Odahara, A.
• Podolyák, Zs
• Roberts, O. J.
• Schaffner, H.
• Shand, C.
• Shimizu, Y.
• Suzuki, H.
• Takeda, H.
• Taprogge, J.
• Terashima, S.
• Vajta, Z.
• Yoshida, S.

Titel

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

Ist Teil von

• Physical review letters, 2017-02, Vol.118 (7), Article 072701

Ort / Verlag

American Physical Society

Erscheinungsjahr

2017

Quelle

American Physical Society

Beschreibungen/Notizen

• The β-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 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. 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.