Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
4019K21   Potassium
J(π)=4-
T1/2=1.25e+9 y
Abundance: 0.0117% 1
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess -33.535492
(0.000056)		 -34.550 2.990
BE 341.524 342.538
BE/A 8.538 8.563
<R2ch>1/2 = 3.4331 ± 0.0191 fm [3]
Charge-density Distribution [6]

β2= -0.052
β3= 0.000
β4= 0.001
β6= -0.010
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay-6438.37
β- - decay1310.93
β+ - decay482.37
e-capture1504.37
1p - decay-7582.30
2p - decay-18315.40
1n - decay-7799.60
2n - decay-20877.34
2β- - decay-13012.09
β-,n-14324.05
β-,2n-27619.56
β-,d-17870.40
β-,t-23685.06
β-,α-5728.82
β-,n,α-20984.25
EC,p-11024.34
EC,2p-21252.34
EC,α-5296.30
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
β- endpoint energies
β+ endpoint energies
γ-energies
σ (b)
Capture 30.00
 
μ (nm) Q (b) E* (keV)
+4.4(11)2543
+4.1(7)2543
-1.29(9)30
-1.2982(4)0
-1.298100(3)0
-0.073(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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.