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 24S(n)= 3788 keV 26S(p)= 6660 keV SYQ(α)= 4330 keV SY
Reference: 2021Wa16

General 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)




E(level)
(keV)
T1/2(level)
  0 1.3 m +23-4 
% β- = ?

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments

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