Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21588Ra127   Radium
J(π)=(9/2+)
T1/2=1.66 ms
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 2.534055
(0.007628)		 2.390 -5.240
BE 1663.953 1664.097
BE/A 7.739 7.740
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= -0.021
β3= 0.000
β4= 0.012
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 - decay8864.16
β- - decay-3496.88
β+ - decay1193.60
e-capture2215.60
1p - decay-3796.75
2p - decay-6346.06
1n - decay-5630.14
2n - decay-13966.48
2β- - decay-8387.43
β-,n-11981.74
β-,2n-19764.77
β-,d-10959.54
β-,t-12217.04
β-,α4249.01
β-,n,α-4629.61
EC,p-435.60
EC,2p-5464.82
EC,α11755.95
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
α-energies
 
μ (nm) Q (b) E* (keV)
15.78(15)3757+x
15.61(6)3757+x
18.9(2)4567+x
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.