ADOPTED LEVELS for 224At
Authors: Balraj Singh, Sukhjeet Singh | Citation: ENSDF | Cutoff date: 08-Mar-2022
Authors: Sukhjeet Singh, Balraj Singh | Citation: Nucl. Data Sheets 130, 127 (2015) | Cutoff date: 15-Oct-2015
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=5266 keV 24 | S(n)= 3788 keV 26 | S(p)= 6660 keV SY | Q(α)= 4330 keV SY | ||
Reference: 2021Wa16 |
E(level) (keV) | T1/2(level) |
0 | 1.3 m +23-4 % β- = ? |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
2010Ch19: 224At nuclide was discovered in the 9Be(238U,X) reaction; beam energy 670 MeV/nucleon with target=4 g/cm2 using Fragment Recoil Separator facility at GSI. The fragments were then injected into the cooler electron storage ring ESR. Measured mass and half-life by time-resolved Schottky Mass Spectrometry technique.
2010Al24 measured σ. Figure 2 of this reference plots σ versus α. Statistical uncertainty <10%, and systematic uncertainty≈20% Comparisons of measured σ with model predictions using the computer codes COFRA and EPAX; COFRA provides an overall good description of the measured σ.
Measured mass excess=27711 keV 22 (2012Ch19; also 2010Ch19)
Theoretical calculations: two references extracted from the NSR database are listed in document records.
Q-value: Estimated uncertainties: 200 for S(p), 300 for Q(α) (2021Wa16)
Q-value: S(2n)=9385 27, S(2p)=15820 300 (syst) (2021Wa16)