Nucleus[1] Binding energy (MeV) g.s. Radius[3] & Deformation[4]
24293Np149   Neptunium
J(π)=(1+)
T1/2=2.20 m
  Experiment
[2]		 Theory
[4]		 Sh.corr.
[4]
Mass Excess 57.418575
(0.200008)		 57.330 -2.150
BE 1823.082 1823.171
BE/A 7.533 7.534
<R2ch>1/2 = 
Charge-density Distribution [6]

β2= 0.237
β3= 0.000
β4= 0.073
β6= -0.027
Excited States[1]
click on a plot to process it 		Known and possible Decays[1] Q-values (keV)
roman [2], italic [4]
α - decay4099.64
β- - decay2700.03
β+ - decay-2224.46
e-capture-1202.46
1p - decay-6067.42
2p - decay-13962.42
1n - decay-4914.71
2n - decay-11041.78
2β- - decay1948.77
β-,n-3609.67
β-,2n-8851.18
β-,d-8034.85
β-,t-6843.78
β-,α7684.60
β-,n,α1530.35
EC,p-9560.46
EC,2p-16058.04
EC,α2367.64
Metastable states and Resonances[1] Radiation energies (keV)[1] Thermal neutrons[1] El.-Magn. properties[5,7,8]
 
E = 0+x keV
T1/2 = 5.50 m
β-
100%
β- endpoint energies
γ-energies
    
[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[3] I. Angeli, K.P. Marinova, Atomic Data and Nuclear Data Tables, 2013, vol. 99, pp. 69-95; unpublished update, 2016.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.