Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21688Ra128   Radium
J(π)=0+
T1/2=182.00 ns
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 3.291363
(0.00875)		 3.300 -4.270
BE 1671.267 1671.258
BE/A 7.737 7.737
<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 - decay9525.71
β- - decay-4853.10
β+ - decay-702.01
e-capture319.99
1p - decay-4316.06
2p - decay-6967.26
1n - decay-7313.99
2n - decay-12944.13
2β- - decay-7007.17
β-,n-10810.87
β-,2n-19295.73
β-,d-9937.20
β-,t-12016.34
β-,α4382.28
β-,n,α-3064.98
EC,p-2829.48
EC,2p-7907.27
EC,α9494.22
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 1164.1 keV
T1/2 = -1
α
0.23%
E = 1507.6 keV
T1/2 = 200.00 ps
α
0.58%
E = 1711.1 keV
T1/2 = 1.42 ns
α
1.86%
E = 2026 keV
T1/2 = 600.00 ps
α
0.12%
    
μ (nm) Q (b) E* (keV)
g(avge)=0.1(3)1508
g(avge)=0.1(3)1711
+3(3)1711
+1(3)2026
-1(3)2679
+9.3(10)3763
+9.7(6)3763
+18(5)5170
g=0.63(6)5170
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.