Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
22487Fr137   Francium
J(π)=1(-)
T1/2=3.33 m
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 21.795097
(0.013041)		 21.930 -0.840
BE 1718.116 1717.981
BE/A 7.670 7.670
<R2ch>1/2 = 5.7229 ± 0.0172 fm [3]
Charge-density Distribution [6]

β2= 0.143
β3= -0.139
β4= 0.084
β6= 0.009
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay4994.45
β- - decay2967.80
β+ - decay-1672.04
e-capture-650.04
1p - decay-5883.64
2p - decay-13735.93
1n - decay-4660.18
2n - decay-10697.27
2β- - decay1560.17
β-,n-3510.98
β-,2n-8669.04
β-,d-7690.33
β-,t-6433.27
β-,α8756.67
β-,n,α2468.03
EC,p-8921.94
EC,2p-15269.20
EC,α4106.70
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)
+0.517(4)0
+0.40(1)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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.