Author: Balraj Singh |  Citation: Nucl. Data Sheets 147, 382 (2018) |  Cutoff date: 1-DEC-2017 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=3510 keV SYS(n)= 3310 keV SYS(p)= 9770 keV SYQ(α)= 2150 keV SY
Reference: 2017WA10

General Comments:

217Pb evaluated by B. Singh

2010Al24: 217Pb nuclide identified in 9Be(238U,X) reaction with a beam energy of 1 GeV/nucleon produced by the SIS synchrotron at GSI facility. Target=2500 mg/cm2. The fragment residues were analyzed with the high resolving power magnetic spectrometer Fragment separator (FRS). The identification of nuclei was made on the basis of magnetic rigidity, velocity, time-of-flight, energy loss and atomic number of the fragments using two plastic scintillators and two multisampling ionization chambers. The FRS magnet was tuned to center on 210Au, 216Pb, 219Pb, 227At and 229At nuclei along the central trajectory of FRS. Comparisons of measured σ with model predictions using the computer codes COFRA and EPAX. See also previous report 2009Al32 by the same group as 2010Al24

2017Ca12,2016Ca25: 217Pb produced by fragmentation of E=1 GeV/nucleon 238U beam at GSI on a 9Be target of thickness 1.6 g/cm2. Reaction products were separated and identified by GSI Fragment Separator (FRS) using Bρ-ΔE-Bρ technique. The FRS tracking detectors were four time-projection chambers (TPCs), two ionization chambers, and thin plastic scintillators for tof measurement. Mass-over-charge (α/Q) ratios were measured for ions analyzed on an event-by-event basis. Finally selected ions of interest were implanted into a stack of double-sided silicon strip detectors SIMBA, which also detected β-decay events. Comparison with theoretical calculations using FRDM+QRPA, DF3+cQRPA KTUY and RHB+RQRPA models. (cQRPA=continuum quasi-random-phase approximation; FRDM=finite-range droplet model; DF3=density functional theory; RHB=relativistic Hartree-Bogoliubov; RQRPA=relativistic QRPA; KTUV=Koura-Tachibana-Uno-Yamada model). Relevance to r-process in nucleosynthesis.

Q-value: Estimated uncertainties (2017Wa10): 300 for Q(β-), 360 for S(n), 420 for S(p) and Q(α)

Q-value: S(2n)=8250 300, S(2p)=18550 500 (syst, 2017Wa10)

  0 19.9 s 53 
% β- = 100

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Additional Level Data and Comments:

  0 19.9 s 53 
% β- = 100
From α/Z plot (figure 1 in 2010Al24), a large number (certainly more than few hundreds) of events are assigned to 217Pb.

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