Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
20887Fr121   Francium
J(π)=7+
T1/2=59.10 s
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -2.665813
(0.011393)		 -2.780 -4.400
BE 1613.436 1613.550
BE/A 7.757 7.757
<R2ch>1/2 = 5.5699 ± 0.0177 fm [3]
Charge-density Distribution [6]

β2= -0.094
β3= 0.000
β4= 0.003
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 - decay6784.72
β- - decay-4380.77
β+ - decay5967.38
e-capture6989.38
1p - decay-1320.10
2p - decay-4814.83
1n - decay-7892.78
2n - decay-17565.92
2β- - decay-13424.88
β-,n-14275.97
β-,2n-22374.19
β-,d-14558.99
β-,t-16305.77
β-,α2892.30
β-,n,α-7002.70
EC,p3272.06
EC,2p944.51
EC,α13250.05
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)
0.00(4)0
+4.75(10)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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.