Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
21187Fr124   Francium
J(π)=9/2-
T1/2=3.10 m
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -4.139817
(0.011995)		 -4.110 -6.060
BE 1639.124 1639.094
BE/A 7.768 7.768
<R2ch>1/2 = 5.5876 ± 0.0176 fm [3]
Charge-density Distribution [6]

β2= 0.011
β3= 0.000
β4= 0.000
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 - decay6662.19
β- - decay-4971.81
β+ - decay3593.16
e-capture4615.16
1p - decay-1824.28
2p - decay-5835.46
1n - decay-8878.61
2n - decay-16514.46
2β- - decay-11341.96
β-,n-12671.40
β-,2n-22136.48
β-,d-13507.53
β-,t-16423.77
β-,α2070.03
β-,n,α-5520.59
EC,p542.80
EC,2p-2352.28
EC,α10580.55
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 2423.16 keV
T1/2 = 146.00 ns
IT
100%
E = 4657.3 keV
T1/2 = 123.00 ns
IT
100%
α-energies
γ-energies
 
μ (nm) Q (b) E* (keV)
(-)2.0(6)4657
(-)1.07(18)2423
-0.19(3)0
+4.00(8)0
15.37(15)2423
24.3(2)4657
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.