Author: B. Singh |  Citation: Nucl. Data Sheets 114, 2023 (2013) |  Cutoff date: 1-JUN-2022 

 Full ENSDF file | Adopted Levels (PDF version) 

Q(β-)=7080 keV SYS(n)= 2730 keV SY
Reference: 2021WA16

General Comments:

215Hg evaluated by B. Singh

2010Al24: 215Hg 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 Recoil Separator (FRS) at GSI. 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, the 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

Criteria 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.

Q-value: Estimated uncertainties: ΔQ(β-)=500, ΔS(n)=570 (2021Wa16)

Q-value: Q(β-n)=2570 450, S(2n)=7230 500 (syst,2021Wa16). S(2p)=20780 (1997Mo25,calculated)

  0 % β- = 100
% β-n = ?

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Additional Level Data and Comments:

  0 % β- = 100
% β-n = ?
Production cross section measured in 2010Al24, values are given in figure 2, plot of σ versus mass number of Hg isotopes. Statistical uncertainty=10%, systematic uncertainty=20%.

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