Authors: Balraj Singh Et Al., |  Citation: Nucl. Data Sheets 175, 1 (2021) |  Cutoff date: 19-May-2021 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=3640 keV SYS(n)= 4970 keV SYS(p)= 6600 keV SYQ(α)= 3870 keV SY
Reference: 2021WA16

General Comments:

2010Al24 (also 2009Al32): 219Bi nuclide produced and identified in 9Be(238U,X),E=1 GeV/nucleon at the SIS synchrotron facility of GSI. The fragment residues were analyzed with a 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. At 1 GeV/nucleon incident energy of 238U, fraction of fully stripped 226Po nuclei was about 89%. 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. See also previous report 2009Al32 by the same group as 2010Al24

2012Be28: see 2010Al24 above for method of production at GSI facility. In this work half-life of the isotope is measured from implant of 2800 events using FRS-RISING setup at GSI

2014Mo02, 2014Mo15: 219Bi produced in 9Be(238U,X), E=1 GeV/nucleon and 9Be(208Pb,X),E=1 GeV/nucleon reactions at GSI using FRS separator; RISING array used for γ-ray measurements from decay of 219Bi

2016Ca25, 2017Ca12: 219Bi produced by fragmentation of E=1 GeV/nucleon 238U beam from SIS-18 synchrotron 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.

Theoretical calculations: four primary references in the NSR database ( related to radioactivity

Q-value: Estimated uncertainties (2021Wa16): 200 for Q(β-) and S(n), 360 for S(p) and Q(α)

Q-value: S(2n)=8550 200, S(2p)=16920 450, Q(β-n)=-110 200 (syst,2021Wa16)

Jπ(level) T1/2(level)
  0 (9/2-) 22 s 7 
% β- = 100

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Additional Level Data and Comments:

  0(9/2-) 22 s 7 
% β- = 100
Production σ=118 nb (from e-mail reply of Oct 29, 2010 from H. Alvarez-Pol). Production cross section measured in 2010Al24, values are given in figure 2, plot of σ versus mass number for Bi isotopes. Statistical uncertainty=10%, systematic uncertainty=20%.

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