ADOPTED LEVELS for 57K
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 15-Sep-2023
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=21690 keV SY | S(n)= 1920 keV SY | S(p)= 19710 keV CA | Q(α)= -18230 keV CA | ||
| Reference: 2021Wa16,2019Mo01 |
| E(level) (keV) | T1/2(level) |
| 0 | % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? % B-4N = ? |
Additional Level Data and Comments:
2018Ta17: 57K 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 eight events were assigned to 57K.
No references in the NSR database for theoretical structure calculations.
Q-value: Estimated uncertainties (2021Wa16): 720 for Q(β-), 850 for S(n).
Q-value: S(p) and Q(α) from 2019Mo01. Q(β-) and S(n) from 2021Wa16.
Q-value: S(2n)=2480 780, Q(β-n)=19570 650 (syst, 2021Wa16). S(2p)=44990 (2019Mo01, theory). Q(β-2n)=16640 620, Q(β-3n)=15080 600, Q(β-4n)=11240 600, Q(β-5n)=8040 600, Q(β-6n)=2040 600 (syst, deduced by evaluator from relevant mass excesses in 2021Wa16)