Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
22787Fr140   Francium
J(π)=1/2+
T1/2=2.47 m
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 29.685782
(0.013041)		 30.140 0.250
BE 1734.439 1733.985
BE/A 7.641 7.639
<R2ch>1/2 = 5.7542 ± 0.0172 fm [3]
Charge-density Distribution [6]

β2= 0.163
β3= -0.070
β4= 0.097
β6= 0.018
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay3832.88
β- - decay2506.36
β+ - decay-4222.09
e-capture-3200.09
1p - decay-6350.41
2p - decay-15287.22
1n - decay-5926.07
2n - decay-10277.62
2β- - decay3834.77
β-,n-2055.05
β-,2n-8451.09
β-,d-7270.68
β-,t-7059.08
β-,α6871.18
β-,n,α2815.59
EC,p-12217.25
EC,2p-19422.25
EC,α181.85
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
β- endpoint energies
γ-energies
 
μ (nm) Q (b) E* (keV)
+1.50(3)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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.