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Decay characteristics of some neutron-rich lanthanide nuclides obtained by SISAK technique

1974; Elsevier BV; Volume: 10; Issue: 9 Linguagem: Inglês

10.1016/0020-1650(74)80131-5

1878-3473

P.O. Aronsson, Gunnar Skarnemark, Eivind Kvåle, M. Skarestad,

Nuclear reactor physics and engineering

γ-γ coincidence measurements on short-lived, neutron-rich lanthanide nuclides have been performed using the fast chemical separation system SISAK. The results include the assignment of 11 γ-rays to 147Ce and 6 to 148Ce, decaying with mean half-lives of 56.4 ± 1.2 s and 48.1 ± 1.1 s, respectively. Several previously unknown γ-rays are reported for 144La as well as for 148Pr. Partial decay schemes are proposed for 144La and 146La, and the energy levels are discussed in terms of ground state rotational levels.