Author: M. S. Basunia |  Citation: Nucl. Data Sheets 181, 475 (2022) |  Cutoff date: 1-Jan-2022 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=4987 keV 28S(n)= 4740 keV SYS(p)= 8530 keV SYQ(α)= 1590 keV SY
Reference: 2021WA16

  A  9Be(238U,xγ) 

General Comments:

2010Ch19, 2012Ch19: 213Tl isotope was produced in the fragmentation of 238U beam at 670 MeV/nucleon with a 4 g/cm2 9Be target followed by separation by Fragment Recoil Separator facility at GSI. The fragments were then injected into the cooler electron storage ring ESR. Measured mass and half-life by time-resolved Schottky Mass spectrometry technique

2010Al24: 213Tl 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.

Unambiguous identification of nuclides required the separation of different charge states of the nuclei passing through the FRS. Through the measurement of difference in magnetic rigidity in the two sections of the FRS and the difference in energy loss in the two ionization chambers, the charge state of the transmitted nuclei was determined, especially, that of the singly charged (hydrogen-like) nuclei which preserved their charge in the current experimental setup. Measured production cross sections with 10% statistical and 20% systematic uncertainties

Criterion established in 2010Al24 for acceptance of identification of a new nuclide: 1. number of events should be compatible with the corresponding mass and atomic number located in the expected range of positions at both image planes of the FRS spectrometer; 2. number of events should be compatible with >95% probability that at least one of the counts does not correspond to a charge-state contaminant. Comparisons of measured σ with model predictions using the computer codes COFRA and EPAX.

2012Be28: Method of production at GSI facility same as in 2010Al24. In this work half-life of the isotope is measured from an implant of 1526 events using FRS-RISING setup at GSI

Levels: Measured mass excess=1763 keV 61 (2010Ch19, 2012Ch19)

Q-value: ΔS(n)=200 (syst), ΔS(p)=300 (syst), ΔQ(α)=400 (syst) (2021Wa16)

Q-value: S(p) and Q(α) from 2019Mo01

Q-value: Q(β-n)=1261 27, S(2n)=8280 50 (2021Wa16), S(2p)=18760 (2019Mo01, calculated)

XREFJπ(level) T1/2(level)E(γ)
I(γ)Final Levels
      0A (1/2+) 23.8 s 44 
% β- = 100
% β-n = 7.6 34
  380+X?A 4.1 µs 5    380 1 

  698+Y?A 0.6 µs 3    698 1 

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Additional Level Data and Comments:

      0(1/2+) 23.8 s 44 
% β- = 100
% β-n = 7.6 34
Production cross section measured in 2010Al24, values are given in figure 2, plot of σ versus mass number for Tl isotopes. Statistical uncertainty=10%, systematic uncertainty=20%. Production σ=9.74 nb (from e-mail reply of H. Alvarez-Pol to B. Singh (Dated: Oct 29, 2010), which also stated that further analysis was in progress. From α/Z plot (figure 1 in 2010Al24), a large number of events is assigned to 213Tl.

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