Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21988Ra131   Radium
J(π)=(7/2)+
T1/2=10.00 ms
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 9.394568
(0.008272)		 9.670 -2.420
BE 1689.378 1689.102
BE/A 7.714 7.713
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.090
β3= -0.139
β4= 0.055
β6= 0.012
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay8137.86
β- - decay-2175.23
β+ - decay-246.05
e-capture775.95
1p - decay-4953.90
2p - decay-8842.36
1n - decay-5328.19
2n - decay-12635.75
2β- - decay-5078.43
β-,n-9520.82
β-,2n-15451.76
β-,d-9628.82
β-,t-8846.56
β-,α6651.28
β-,n,α-143.40
EC,p-3112.31
EC,2p-9579.40
EC,α8224.49
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
α-energies
γ-energies
    
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.