Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
20687Fr119   Francium
J(π)=(2+,3+)
T1/2=16.00 s
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -1.24249
(0.028195)		 -1.240 -2.910
BE 1595.870 1595.868
BE/A 7.747 7.747
<R2ch>1/2 = 5.5618 ± 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 - decay6923.41
β- - decay-4808.26
β+ - decay6850.87
e-capture7872.87
1p - decay-817.64
2p - decay-3945.06
1n - decay-8003.98
2n - decay-17992.48
2β- - decay-14704.42
β-,n-15152.59
β-,2n-23432.19
β-,d-14985.54
β-,t-17068.54
β-,α2606.93
β-,n,α-7666.17
EC,p4438.73
EC,2p2520.28
EC,α14256.70
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 0+x keV
T1/2 = 16.00 s
α
84%		EC
16%
E = 531 keV
T1/2 = 700.00 ms
α
5%		IT
95%
α-energies
β+ endpoint energies
γ-energies
 
μ (nm) Q (b) E* (keV)
+3.97(6)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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.