ADOPTED LEVELS for 222Fr
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-)=2058 keV 9 | S(n)= 4970 keV 9 | S(p)= 5382 keV 9 | Q(α)= 5853 keV 14 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 226Ac α decay (29.37 H) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | A | 2- | 14.2 m 3 % β- = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 2- | 14.2 m 3 % β- = 100 | μ=+0.63 1 (1985Co24,2019StZV), Q=+0.51 4 (1985Co24,2021StZZ) Only β- decay was observed, thus 100% β- is assigned. %α<1 was estimated by 1950Hy20 from α systematics, but not observed. E(level): Only β- decay was observed, thus 100% β- is assigned. %α<1 was estimated by 1950Hy20 from α systematics, but not observed. |
1950Hy20: 222Fr produced and identified in 232Th(p,X) at LBNL, measured T1/2 of its decay.
1973AfZV, 1976VaZC: measured T1/2 of decay of 222Fr.
1979Ca16: measured yield in U(p,X),E=600 MeV reaction.
1986Au02: measured mass excess.
1992Bo28: measured mass excess using tandem Penning trap mass spectrometer at ISOLDE-CERN facility
2009Pa49: measured yield in 238U(p,X),E=1 GeV/nucleon
2014Kr09: measured mass excess measurement from tof-ICR resonances, and frequency ratios using ISOLTRAP Penning-trap at ISOLDE-CERN
Theoretical calculations:
2023Ja02, 2021Sa52: calculated half-lives for cluster and 2α decays.
2015Bh08: theory: Q(β-)values, T1/2, binding energies, rms charge radii, and quadrupole deformation using relativistic mean field theory
2019Vi04: calculated mean values of the coefficients as functions of the radius parameter, assuming Fermi distribution of nuclear density; evaluated relevant coefficients for the nuclear factor of the Parity-nonconserving (PNC) amplitude in low energy atomic experiments.
2005Dz02: calculated isotope shift and charge radius using relativistic Hartree-Fock method
1992Ch20: calculated well depth, quadrupole and hexadecapole deformations, level energies, static moments of inertia, oblate superdeformed minimum, prolate superdeformation features using Fermion dynamic symmetry model.
1985Po11: calculated T1/2 for cluster decay.
Q-value: S(2n)=11247 8, S(2p)=12576 16 (2021Wa16)