Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21H1   Hydrogen
J(π)=1+
T1/2=stable
Abundance: 0.0115% 70
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 13.13572174
(0.00000011)		    
BE 2.225  
BE/A 1.112  
<R2ch>1/2 = 2.1421 ± 0.0088 fm [3]
Charge-density Distribution [6]

β2=
β3=
β4=
β6=
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay 
β- - decay 
β+ - decay 
e-capture 
1p - decay-2224.60
2p - decay 
1n - decay-2224.55
2n - decay 
2β- - decay 
β-,n 
β-,2n 
β-,d 
β-,t 
β-,α 
β-,n,α 
EC,p 
EC,2p 
EC,α 
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
  
σ (b)
Capture 0.00
Scattering 3.39
 
μ (nm) Q (b) E* (keV)
+0.857438240(12)d0
+0.857438228(9)d0
+0.00286(2)0
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.