ADOPTED LEVELS for 222At
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-)=4581 keV 16 | S(n)= 3901 keV 21 | S(p)= 6110 keV 25 | Q(α)= 5310 keV 30 | ||
| Reference: 2021WA16 |
| E(level) (keV) | T1/2(level) |
| 0 | 54 s 10 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 54 s 10 % β- = 100 | Only the β- decay mode has been observed. E(level): Only the β- decay mode has been observed. |
1989Bu09: 222At produced and identified in 232Th(p,X),E=600 MeV by spallation with a negative ion source where chemically pure beams of halogen elements were produced at the ISOLDE-CERN facility. The reaction products were mass separated, and the half-life of 222At decay, as well as the isotopic yield were measured
2010Li02: measured mass excess using Schottky mass spectrometry at GSI.
2010Al24: measurement of production cross-section in 9Be(238U,X),E=1 GeV/nucleon reaction at GSI
Theoretical calculations:
2022Xu10: calculated α-decay half-life using an improved semi-empirical formula
2021Sa52: calculated Q(2α), T1/2(2α) with and without deformation effects using modified generalized liquid drop model (MGLDM), Coulomb and proximity potential model (CPPM) for double α decay.
2012Zh46: calculated binding energy, rotational correction energy, β2 using covariant density functional theory with the point-coupling interaction α(p)-PK1.
Q-value: S(2n)=9565 21, S(2p)=14580 300 (syst) (2021Wa16).