Q_β MEASUREMENTS OF NEUTRON-RICH RARE EARTH NUCLEI PRODUCED WITH PROTON INDUCED FISSION OF ²³⁸U

Qβ measurements of neutron-rich isotopes with a total-absorption type Ge detector using the KUR-ISOL

“…These values are much larger than systematic uncertainties of this energy region, and mainly caused by statistical uncertainties. Figure 9 shows comparisons of Q β s. The present values are in good agreement with the values measured by total absorption BGO detector [5], in which Q β s were analyzed by a conventional root plot method. It is important that the Q β s deduced by different detector and analyzing procedure are consistent.…”

“…In addition to this experiment, nine nuclides 151 Ce and 153 Pr were also produced by the ISOL and measured. The Q β s of these nuclei were previously measured with accuracy of 100 keV by Shibata et al using a total absorption BGO detector [5] installed at the KUR-ISOL. It is important to measure these nuclei using different detectors to improve reliabilities of the deduced Q β s. For these nuclei, total counting rates of 10-120 cps were obtained, and measuring period was approximately 10 h for each nuclide.…”

“…a Present author, e-mail: h052304d@mbox.nagoya-u.ac.jp has developed total absorption BGO detector, and Q β s of low-yielded nuclei have been reported with accuracy of 100 keV [3][4][5]. Another type of a total-absorption type Ge detector has been developed.…”

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

“…A third paper [60] gives only the ground state Q β value at 6.960(100) MeV. The adopted AME03 Q β values are 6.930 (50) MeV for the ground state and 7.580(110) MeV for the metastable state.…”

“…159 Pm: This nuclide had not been measured by any means as of AME03 publication, but has since been subject of β-endpoint measurements [50] subsequently reanalyzed by Hayashi et al [48] resulting in Q β = 5.460(140) MeV. This differs from the CPT value of 5.653 (21) MeV by 1.4 σ.…”