Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
20584Po121   Polonium
J(π)=5/2-
T1/2=1.74 h
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -17.509208
(0.02032)		 -17.630 -7.050
BE 1606.413 1606.533
BE/A 7.836 7.837
<R2ch>1/2 = 5.5389 ± 0.0189 fm [3]
Charge-density Distribution [6]

β2= -0.052
β3= 0.000
β4= 0.001
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 - decay5325.29
β- - decay-4538.92
β+ - decay2532.92
e-capture3554.92
1p - decay-4152.63
2p - decay-7301.20
1n - decay-7239.71
2n - decay-16341.05
2β- - decay-9795.29
β-,n-13705.04
β-,2n-21489.25
β-,d-13334.11
β-,t-14534.85
β-,α1480.59
β-,n,α-7634.70
EC,p311.13
EC,2p-6326.40
EC,α7244.79
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 880.31 keV
T1/2 = 645.00 µs
IT
100%
E = 1461.21 keV
T1/2 = 57.40 ms
IT
100%
α-energies
β+ endpoint energies
γ-energies
 
μ (nm) Q (b) E* (keV)
+0.76(6)0
-0.95(5)880
  
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.