Nitrogen-22

Properties and data of the isotope ²²N.

Content

General data

Name of the isotope:Nitrogen-22; N-22Symbol:²²N or 227NMass number A:22 (= number of nucleons)Atomic number Z:7 (= number of protons)Neutrons N:15Isotopic mass:22.03410(22) u (atomic weight of Nitrogen-22)Nuclide mass:22.03026 u (calculated nuclear mass without electrons)Mass excess:31.76395 MeVMass defect:0.150648964 u (per nucleus)Nuclear binding energy:140.32860607 MeV (per nucleus)
6.378573 MeV (average binding energy per nucleon)Separation energy:S_N = 1.54(25) MeV (first neutron)
S_P = 21.17(63) MeV (first proton)Half-life:23(3) msDecay constant λ:30.136833937389 s^-1Specific activity α:8.249466320158 × 10⁺²³ Bq g^-1
22295854919346 Ci g^-1Spin and parity:
(nuclear angular momentum)(0-)Year of discovery:1979

Radioactive Decay

Half-life T_½ = 23(3) ms respectively 2.3 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	²²O	54 %	22.48(22) MeV
β^-, n	²¹O	34(3) %	15.63(21)
β^-, 2n	²⁰O	12(3) %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 15) and isobaric (same nucleon number A = 22) with Nitrogen-22. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 15	Isobar A = 22
5	²⁰B
6	²¹C	²²C
7	²²N	²²N
8	²³O	²²O
9	²⁴F	²²F
10	²⁵Ne	²²Ne
11	²⁶Na	²²Na
12	²⁷Mg	²²Mg
13	²⁸Al	²²Al
14	²⁹Si	²²Si
15	³⁰P
16	³¹S
17	³²Cl
18	³³Ar
19	³⁴K
20	³⁵Ca
21	³⁶Sc