Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21185At126   Astatine
J(π)=9/2-
T1/2=7.21 h
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -11.646829
(0.002771)		 -11.480 -9.270
BE 1648.196 1648.029
BE/A 7.811 7.811
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.000
β3= 0.000
β4= 0.000
β6= 0.000
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay5982.38
β- - decay-2891.78
β+ - decay-236.74
e-capture785.26
1p - decay-2983.13
2p - decay-7966.68
1n - decay-7746.47
2n - decay-14907.07
2β- - decay-7506.94
β-,n-10113.56
β-,2n-18860.57
β-,d-11900.13
β-,t-14126.97
β-,α3073.61
β-,n,α-3954.63
EC,p-4144.40
EC,2p-8610.74
EC,α8379.76
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 4814.5 keV
T1/2 = 4.23 µs
IT
100%
α-energies
γ-energies
 
μ (nm) Q (b) E* (keV)
(-)1.88(19)4816
(-)1.01(7)2641
[(-)0.524(10)]1417
+9.56(9)1417
+15.31(13)2641
13.46(14)4816
  
[1] National Nuclear Data Center, Evaluated Nuclear Structure Data File, https://www.nndc.bnl.gov/ensdf/.
[2] M. Wang, G. Audi, A.H. Wapstra, F.G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chinese Physics C, 2012, vol. 36, pp. 1603-2014.
[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.
[4] P. Möller, A.J. Sierk, T. Ichikawa, H. Sagawa, Atomic Data and Nuclear Data Tables, 2016, vol. 109-110, pp. 1-204.
[5] N.J. Stone, https://www-nds.iaea.org/publications/indc/indc-nds-0658/; Atomic Data and Nuclear Data Tables, 2016, vol. 111-112, pp. 1–28.
[6] H. de Vries, C.W. de Jager, C. de Vries, Atomic Data and Nuclear Data Tables, 1987, vol. 36, pp. 495-536.
[7] B. Pritychenko, M. Birch, B. Singh, M. Horoi, Atomic Data and Nuclear Data Tables, 2016, vol. 107, pp. 1–139; 2017, vol. 114, pp. 371–374.
[8] T. Kibedi and R.H. Spear, Atomic Data and Nuclear Data Tables, 2002, vol. 80, pp. 35-82.