ADOPTED LEVELS for 159Pr

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 07-June-2023 

Author: Filip G. Kondev |  Citation: ENSDF |  Cutoff date: 20-Feb-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=8950 keV SYS(n)= 4690 keV SYS(p)= 11520 keV SYQ(α)= -5260 keV SY
Reference: 2021WA16

General Comments:

2017Wu04: 159Pr produced and identified at the RIBF-RIKEN facility in 9Be(238U,F),E(238U)=345 MeV/nucleon, optimized for the transmission of 158Nd and 170Dy, followed by the identification of the nuclide of interest using the BigRIPS separator by determining α/Q ratio using the tof-Bρ-ΔE method using the ZeroDegree Spectrometer, and finally implanted into the beta-counting system WAS3ABi, surrounded by the EURICA array of 84 HPGe detectors. Measured (implanted ions)β-(t), (implanted ions)β-γ(t) and (implanted ions)γ(t) correlations, and T1/2 of the g.s. of 159Pr

2018Fu08: 159Pr nuclide produced at the RIBF-RIKEN facility using the 9Be(238U,F) reaction with a 238U86+ beam of E=345 MeV/nucleon produced by the RIBF accelerator complex. Target=9Be with a thickness of 2.92 mm. Nuclidic identification (PID) was made by determining the atomic number Z and mass-to-charge (α/Q) ratio of the ions using magnetic rigidity, time-of-flight, and energy loss (tof-Bρ-ΔE method) using the BigRIPS fragment separator. The time-of-flight was measured using thin plastic scintillators placed at foci of the BigRIPS. The Bρ values were deduced from trajectory reconstruction of measured position and angle of fragments at each focus using parallel plate avalanche counters (PPACs). For ΔE values, separated fragments were transported to an achromatic focus and implanted in a Si stack with 14 layers of Si PIN detectors, surrounded by four HPGe clovers for isomer tagging by detecting delayed gamma rays from known isomeric states in fission fragments. Comparison of measured cross sections with theoretical calculations using LISE+ abrasion-fission (AF) model.

Q-value: Estimated uncertainties (2021Wa16): 400 for Q(β-), 500 for S(n), 570 for S(p) and Q(α).

Q-value: Q(β-n)=4990 400, S(2n)=8480 400, S(2p)=26280 500 (syst, 2021Wa16). Q(β-2n)=-418 400 (syst, deduced by evaluator from relevant mass excesses in 2021Wa16)




E(level)
(keV)
T1/2(level)
  0 134 ms 43 
% β- = 100
% β-n = ?

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0 134 ms 43 
% β- = 100
% β-n = ?
Production σ=0.68 nb 4 for Pr setting and 0.22 nb 2 for Gd setting, with 50% systematic uncertainty on σ values (2018Fu08).

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