Nuclide 
The even Z, even N nuclide studied

Transition Energy 
Energy of the first excited 2^{+} state in keV

Transition Rate Ratio 
B(↑) = (2J + 1)B(↓)/(2J_{0}+1), where J_{0}
and J are spins of the lower and upper levels, respectively.

B(E2; 0^{+} → 2^{+}) 
Reduced electric quadrupole transition rate for the ground state to
2^{+} state transition in units of e^{2}b^{2}

W.U. 
Weisskopf units are based on singleparticle estimate for the λth
multipole reduced electric transition probability and originally have been used for
transitions from higher to lower states:
B_{w}(Eλ)=(1/4π)(3/(λ+3))^{2}(1.2)^{2λ}A^{2λ/3}
e^{2}fm^{2λ}


Weisskopf (singleparticle) B(E2) value for
0^{+}→2^{+} transition is given by:
B_{w}(E2↑)=0.297xA^{4/3} e^{2}fm^{4}

τ 
Mean lifetime of the state in ps
τ = 40.81 x
10^{13}E^{5}[B(E2↑)/e^{2}b^{2}]^{1}(1 +
α)^{1}

β 
Deformation parameter
β = (4π/3ZR_{0}^{2})[B(E2↑)/e^{2}]^{1/2}, where
R_{0}^{2} = (1.2 x 10^{13} A^{1/3} cm)^{2} =
0.0144A^{2/3}b

Q_{0} 
Intrinsic quadrupole moment in b Q_{0} =
[16πB(E2↑)/5e^{2}]^{1/2}

Reference 
Nuclear Science References Database Abstract

Global Best Fit 
Global Best Fit for B(E2)↑ by S. Raman, C.W. Nestor and P. Tikkanen

Modified Grodzins rule 
B(E2↑) =
(2.57±0.45)E^{1}Z^{2}A^{2/3}
β = (466±41)E^{1/2}A^{1}

null 
No data available
