Nitrogen-11m

Properties and data of the isotope ¹¹N.

Content

General data

Name of the isotope:Nitrogen-11m; N-11mSymbol:¹¹N or 117NMass number A:11 (= number of nucleons)Atomic number Z:7 (= number of protons)Neutrons N:4Isotopic mass:11.026158(5) u (atomic weight of Nitrogen-11m)
Excitation energy: 730(70) keVNuclide mass:11.022318 u (calculated nuclear mass without electrons)Mass excess:24.36602 MeVMass defect:0.063276887999999 u (per nucleus)Nuclear binding energy:58.94204151 MeV (per nucleus)
5.35836741 MeV (average binding energy per nucleon)Half-life:6.9(80) × 10^-22 sDecay constant λ:1.004561131246 × 10⁺²¹ s^-1Specific activity α:5.499644213438 × 10⁺⁴³ Bq g^-1
1.486390327956 × 10⁺³³ Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-

Radioactive Decay

Half-life T_½ = 6.9(80) × 10^-22 s respectively 6.9 × 10^-22 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	¹⁰C	100 %	2.567 MeV

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹¹N		550(20) ys	1/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 4) and isobaric (same nucleon number A = 11) with Nitrogen-11m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.