ADOPTED LEVELS for 222Po
Authors: Balraj Singh, M.S. Basunia, Jun Chen Et Al., | Citation: Nucl. Data Sheets 192, 315 (2023) | Cutoff date: 25-Sep-2023
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1530 keV 40 | S(n)= 5360 keV 40 | S(p)= 9000 keV SY | Q(α)= 4430 keV SY | ||
| Reference: 2021WA16 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | 0+ | 2 m +12-1 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 2 m +12-1 % β- = 100 | Theoretical β-decay half-life of 36 s and 1012 s for α decay in 2019Mo01 suggest dominant β decay mode, based on which 100 β- decay is assigned by inference, although no decay mode has yet been observed experimentally. E(level): Theoretical β-decay half-life of 36 s and 1012 s for α decay in 2019Mo01 suggest dominant β decay mode, based on which 100 β- decay is assigned by inference, although no decay mode has yet been observed experimentally. |
2010Ch19, 2012Ch19 (also 2008ChZI thesis): 222Po produced and identified in 9Be(238U,X), E=670 MeV/nucleon fragmentation reaction, followed by separation of fragments using the Fragment Recoil Separator at GSI facility. Measured mass excess and half-life of 222Po decay by time-resolved Schottky Mass spectrometry technique
2010Al24: measurements of isotopic cross-section at GSI using 9Be(238U,X),E=1 GeV/nucleon reaction.
Theoretical structure calculations:
2022El03: calculated potential energy surface, binding energy, triaxial shape evolution of even-even polonium isotopic chain using Relativistic Hartree-Bogoliubov (RHB) mean-field model, and a Covariant Density Functional Theory (CDFT).
2018Li28: calculated binding energy, charge rms radius, charge form factor, the slope parameter of symmetry energy using the modified Skyrme-like and the local density approximation models.
2017Se19: calculated difference between the proton or neutron skin thickness, Q(α) using Hartree-Fock-Bogoliubov (HFB) method based on the Skyrme-like effective interactions.
2016Ag06: calculated equilibrium deformation parameters β2 and β3, and potential energy surface for the ground state using CEDF DD-PC1 theory within the relativistic Hartree-Bogoliubov approach.
2012Zh46: calculated binding energy, rotational correction energies, β2 using covariant density functional theory with the point-coupling interaction α(p)-PK1.
Theoretical calculations for decay characteristics:
2022Ya09: calculated half-life of 222Po α decay using Gamow-like model (GLM), Coulomb and proximity potential model (CPPM) including temperature-dependent proximity potential.
2018Sa08: calculated Q(β-)value and T1/2 for normal and hypernucleus.
Q-value: Estimated uncertainties (2021Wa16): 300 for S(p) and Q(α)
Q-value: S(2n)=8920 40, S(2p)=16220 400 (syst) (2021Wa16).