New nuclide 127Pr

In Takasaki Establishment of Japan Atomic Energy Research Institute, the AVF cyclotron and other ionic accelerators were constructed for promoting new development in bio-science and material science fields. The RI production research facility was constructed for developing useful radioisotopes by using this cyclotron. In this facility, the online isotope separator (ISOL) was installed for the basic research on isotopes such as the decay and nuclear structure of short life isotopes. In this report, the first experiment by using the ISOL and other research subjects are described. The necessity of the research on the β-decay of praseodymium in the decay nucleus spectroscopy is explained. Angular correlation measurement was carried out with five Ge detectors. The research on Pr isotopes is briefly described, and 127Pr which was explored this time is considered to have the small probability of delayed proton emission, accordingly, for finding this out, there is only the method depending on the measurement of gamma-ray or X-ray. For the synthesis of 127Pr, 94Mo(36Ar,p2n) reaction is useful as the cross section is large. The experimental method and the results of various measurements are reported. (K.I.)