ADOPTED LEVELS for 157Pr
Author: Filip G. Kondev | Citation: ENSDF | Cutoff date: 20-Feb-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=7921 keV SY | S(n)= 5044 keV SY | S(p)= 11009 keV SY | Q(α)= -4905 keV SY | ||
| Reference: 2017WA10 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0.0 | (3/2-) | 0.295 s +29-11 % β- = 100 % β-n = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
2017Wu04: The 157Pr nuclide was produced at the RIBF-RIKEN facility using the 9Be(238U,F) reaction at E=345 MeV/nucleon. Two experiments, optimized for the transmission of 158Nd and 170Dy ions, were carried out with average beam intensities of 7 pnA and 12 pnA, respectively. The identification of the nuclide of interest was made in the BigRIPS separator by determining the atomic number and the mass-to-charge ratio of the ion using the tof-Bρ-ΔE method. The reaction products were transported through the ZeroDegree Spectrometer and implanted into the beta-counting system WAS3ABi that was surrounded by the EURICA array comprising of 84 HPGe detectors. The typical implantation rate was ~100 ions/s. Measured: implanted ion-β--t, implanted ion-β--γ-t and implanted ions-γ-t correlations. Deduced: T1/2.
Q-value: ΔQ(β-)=301, ΔS(n)=361, ΔS(p)=424, ΔQ(α)=424
Q-value: S(2n)=9268 syst 361, S(2p)=25188 syst 424, Q(β-n)=3862 syst 361