Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21287Fr125   Francium
J(π)=5+
T1/2=20.00 m
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -3.515782
(0.008776)		 -3.490 -6.900
BE 1646.571 1646.546
BE/A 7.767 7.767
<R2ch>1/2 = 5.5915 ± 0.0176 fm [3]
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 - decay6528.95
β- - decay-3317.07
β+ - decay4121.43
e-capture5143.43
1p - decay-2049.77
2p - decay-6122.13
1n - decay-7447.27
2n - decay-16325.88
2β- - decay-10793.63
β-,n-12419.07
β-,2n-20118.66
β-,d-13318.94
β-,t-14697.59
β-,α3714.58
β-,n,α-5377.23
EC,p842.01
EC,2p-2141.12
EC,α11528.43
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
α-energies
β+ endpoint energies
γ-energies
 
μ (nm) Q (b) E* (keV)
(-)1.7(3)5854
(-)0.84(13)2492
-0.10(1)0
+4.62(9)0
9.89(4)1551
+15.65(12)2492
15.60(15)2492
22(4)4834
21.9(3)5854
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.