ADOPTED LEVELS, GAMMAS for 55K
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-Apr-2022
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-APR-2009
Author: Huo Junde | Citation: Nucl. Data Sheets 109, 787 (2008) | Cutoff date: 30-Apr-2007
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=19120 keV SY | S(n)= 2450 keV SY | S(p)= 19380 keV SY | Q(α)= -16250 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 1H(56Ca,2pγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) |
| 0 | A | (3/2+) | % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? % B-4N = ? | ||
| 668 10 | A | (1/2+) | < 37 ps | 668 10 | 100 |
Jπ(level): from theoretical calculations (2022Ko06) using different models: large-scale shell model (LSSM), ab-initio valence-space in-medium similarity renormalization group (VS-IMSRG), and full-space self-consistent Green’s function (SCGF NNLOsat and SCGF NN+3N(lnl)).
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (3/2+) | % β- = 100 % β-n = ? % β-2n = ? % B-3N = ? % B-4N = ? | Theoretical T1/2=9.2 ms, %β-n=87, %β-2n=7, %β-3n=1, %β-4n=0 (2019Mo01). E(level): Theoretical T1/2=9.2 ms, %β-n=87, %β-2n=7, %β-3n=1, %β-4n=0 (2019Mo01). |
| E(level) | E(gamma) | Comments |
2009Ta24, 2009Ta05: 55K identified by fragmentation of 76Ge beam at 132 MeV/nucleon at NSCL facility using A1900 fragment separator combined with S800 analysis beam line to form a two stage separator system. The transmitted fragments were analyzed event-by-event in momentum and particle identification. The nuclei of interest were stopped in eight Si diodes which provided measurement of energy loss, nuclear charge and total kinetic energy. The time-of-flight of each particle that reached the detector stack was measured in four different ways using plastic scintillators, Si detectors, and parallel-plate avalanche counters. The simultaneous measurement of ΔE signals, the magnetic rigidity, total kinetic energy and the time-of-flight (tof) provided unambiguous identification of the atomic number, charge state and mass number.
Theoretical calculations: five primary references (two for structure and three for 55K decay) retrieved from the NSR database at www.nndc.bnl.gov/nsr/. These are listed in this dataset under ’document’ records.
Q-value: Estimated uncertainties (2021Wa16): 530 for Q(β-), 640 for S(n), 940 for S(p), 860 for Q(α).
Q-value: Q(β-n)=17560 500, S(2n)=3380 510 (syst, 2021Wa16).
Q-value: S(2p)=42220 (theory, 2019Mo01)
Q-value: Q(β-2n)=13720 500, Q(β-3n)=10520 500, Q(β-4n)=4520 500, Q(β-5n)=-300 500, all from syst, deduced by evaluator from relevant mass values in 2021Wa16