Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
20587Fr118   Francium
J(π)=(9/2-)
T1/2=3.92 s
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -1.309812
(0.007824)		 -1.080 -2.230
BE 1587.866 1587.636
BE/A 7.746 7.745
<R2ch>1/2 = 5.5609 ± 0.0178 fm [3]
Charge-density Distribution [6]

β2= -0.125
β3= 0.000
β4= 0.018
β6= 0.008
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay7054.65
β- - decay-7148.61
β+ - decay5382.00
e-capture6404.00
1p - decay-615.84
2p - decay-3725.29
1n - decay-9988.50
2n - decay-18328.70
2β- - decay-15539.93
β-,n-15428.21
β-,2n-26119.25
β-,d-15321.76
β-,t-19351.58
β-,α337.80
β-,n,α-7791.64
EC,p3276.58
EC,2p1422.91
EC,α12790.14
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)
+3.81(5)0
+3.89(8)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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.