Phys.Rev. C 79, 034313 (2009)

T.T.Inamura, H.Haba

Search for a "3.5-eV isomer" in ²²⁹Th in a hollow-cathode electric discharge

RADIOACTIVITY ^229mTh(α); measured Eα, Iα, half-life. Search for 3.5-eV isomer in ²²⁹Th populated through nuclear excitation by electronic transition (NEET). ²²⁹Th, ²²⁵Ac, ²²¹Fr, ²¹⁷At, ²¹³Po(α); measured Eα. ^{225,227,229,231,233}Th; level systematics.

doi: 10.1103/PhysRevC.79.034313