ADOPTED LEVELS for 54Ar
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 15-Sep-2023
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=17710 keV SY | S(n)= 2300 keV SY | S(p)= 24130 keV CA | Q(α)= -17260 keV CA | ||
| Reference: 2021Wa16,2019Mo01 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | 0+ | % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? % B-4N = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? % B-4N = ? | Only the β- decay mode is expected, accompanied by delayed neutron decays, thus 100% β- decay is assigned by inference. E(level): Only the β- decay mode is expected, accompanied by delayed neutron decays, thus 100% β- decay is assigned by inference. |
2018Ta17: 54Ar formed by fragmentation of 70Zn30+ beam at 345 MeV/nucleon from RIKEN-RIBF accelerator complex. Rotating target of 9Be of 15 mm thickness were located at the BigRIPS two-stage ion separator. Particle identification (PID) was achieved by measuring time of flight (tof), energy loss (ΔE), total kinetic energy (TKE), and magnetic rigidity (Bρ) through event by event analysis of reaction products. Particles of interest were stopped in a 76-mm thick CsI crystal after passing through six 1-mm thick silicon p-i-n diodes, while the magnetic rigidity (Bρ) of the fragments was reconstructed from position and angle measurements at foci using two sets of position-sensitive parallel plate avalanche counters (PPACs). Optimization was done using LISE++ simulation code. α total of 13 events were assigned to 54Ar.
Theoretical calculations:
2022Bo09: calculated the charge radius within the framework of the Fayans density functional.
2022Kh01: calculated (Mn/Mp)/(n/Z) ratio with the parametrization of radii and diffuseness using the original Bernstein formula.
2019Sa58: calculated S(2n), charge and neutron radii, neutron density and skin thickness, deformation parameters, potential energy surface as a function of the deformation parameter, ground state properties using relativistic mean-field plus state-dependent BCS approach.
2014Eb02: calculated low-lying electric dipole (E1) strengths of pygmy dipole resonances (PDR), the PDR fraction as functions of the neutron number and neutron skin thickness, proton number dependence of the PDR fraction, shell structure, neutron skin thickness, neutron and proton pairing gaps and chemical potentials, quadrupole deformation parameters β2 and γ using the canonical-basis time-dependent Hartree-Fock-Bogoliubov theory.
2013Wa05: calculated single-particle levels, Jπ, occupational probabilities, proton density distributions using Skyrme-Hartree-Fock approach with different tensor forces.
2011Ka03: calculated energy of the first 2+ state using shell model.
1998La02: calculated binding energy, radius, density, deformation using relativistic mean-field theory.
1997Pa38: calculated binding energy, deformations, radius using deformed relativistic mean field calculations.
Q-value: Estimated uncertainties (2021Wa16): 890 for Q(β-), 1060 for S(n).
Q-value: Q(β-) and S(n) from 2021Wa16. S(p) and Q(α) from 2019Mo01.
Q-value: S(2n)=2200 1000, Q(β-n)=16790 810 (syst,2021Wa16). S(2p)=44950 (Theory, 2019Mo01). Q(β-2n)=13560 800, Q(β-3n)=10860 800, Q(β-4n)=6000 800, Q(β-5n)=1820 800 (syst, deduced by evaluator from relevant mass excesses in 2021Wa16)