Qβ measurements of 158, 159Pm , 159, 161Sm , 160-165Eu , 163Gd and 166Tb using a total absorption BGO detector

Mass measurements near ther-process path using the Canadian Penning Trap mass spectrometer

“…158 Pm: This has also been measured only by βendpoint, with a sole experiment in the AME03 giving Q β = 6.120(100) MeV [49]. That experiment has since been reanalyzed by the same group in Hayashi et al [48] resulting in Q β = 6.085 (80) MeV. Both values agree with the CPT value of 6.160 (26) MeV.…”

“…159 Sm: The AME03 cites a single β-endpoint measurement for this nuclide of Q β = 3.840(100) MeV [49], which has since been reanalyzed by the same group in Hayashi et al [48] resulting in Q β = 3.805(65) MeV. Both values agree with the CPT value of 3.834 (14) MeV.…”

“…161 Sm: No measurement of this nuclide existed as of AME03 publication. It has since been subject of the β-endpoint measurements [50] subsequently reanalyzed by the same group in Hayashi et al [48] which found Q β = 5.065(130) MeV, which agrees with the CPT result of 5.119(23) MeV. The CPT mass measurement differs by 310 keV/c 2 with the AME03's extrapolation, which has an uncertainty of 300 keV/c 2 .…”

“…160 Eu: No previous mass measurements for this nuclide were used in the AME03, it having rejected two Model σ (MeV)¯ (MeV) AME03 [29] 0.171 -0.105 FRDM [73] 0.538 -0.379 HFB2 [74] 0.555 0.281 HFB9 [75] 0.467 -0.175 HFBCS1 [76] 0.546 -0.025 DUZU [77] 0.234 0.062 KTUY05 [78] 0.611 0.438 ETFSI2 [79] 0.396 -0.120 (60) MeV [48]. The CPT mass value is consistent with the AME03 systematic extrapolation.…”

“…Two recent sets of measurements demonstrate the importance of considering systematic uncertainties in βendpoint experiments. Hayashi et al [48] give new Q β measurements for some of the Eu and Gd nuclides presented here and a new analysis of that group's earlier Pm and Sm [49,50]…”