Silicon-23

Properties and data of the isotope ²³Si.

Contents

See also: List of individual Silicon isotopes (and general data sources).

General data

Name of the isotope:Silicon-23; Si-23Symbol:²³Si or 2314SiMass number A:23 (= number of nucleons)Atomic number Z:14 (= number of protons)Neutrons N:9Isotopic mass:23.02544(54) u (atomic weight of Silicon-23)Nuclide mass:23.01776 u (calculated nuclear mass without electrons)Mass excess:23.69721 MeVMass defect:0.162094692 u (per nucleus)Nuclear binding energy:150.99023303 MeV (per nucleus)
6.56479274 MeV (average binding energy per nucleon)Separation energy:S_N = 17.71(71) MeV (first neutron)
S_P = 1.79(64) MeV (first proton)Half-life:42.3(4) msDecay constant λ:16.503504299046 s^-1Specific activity α:4.321149024844 × 10⁺²³ Bq g^-1
11678781148229 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2)+Mirror nucleus:Fluorine-23Year of discovery:1986

Radioactive Decay

Half-life T_½ = 42.3(4) ms respectively 4.2 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	²³Al	25.4 %	17.002 MeV
ε, p	²²Mg	71 %	16.880 MeV
ε, 2p	²¹Na	3.6 %	11,378 MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 9) and isobaric (same nucleon number A = 23) with Silicon-23. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 9	Isobar A = 23
3	¹²Li
4	¹³Be
5	¹⁴B
6	¹⁵C
7	¹⁶N	²³N
8	¹⁷O	²³O
9	¹⁸F	²³F
10	¹⁹Ne	²³Ne
11	²⁰Na	²³Na
12	²¹Mg	²³Mg
13	²²Al	²³Al
14	²³Si	²³Si
15	²⁴P