Nuklida · stabil · alami

Neon-22 (²²Ne)

Neon-22 (²²Ne) adalah isotop stabil neon dengan 10 proton dan 12 neutron (nomor massa 22). Kelimpahan alaminya 0.0925(3).

Data nuklida

Unsur: Neon (Ne, Z = 10)
Nomor massa (A): 22
Proton (Z): 10
Neutron (N): 12
Massa atom: 21.991385113 ± 0.000000018 u
Waktu paruh: Stabil
Mode peluruhan: Tidak meluruh
Kelimpahan alami: 0.0925(3)
Tahun penemuan: 1913
Sumber data: IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem

Neon is subject to stable isotopic fractionation by physical processes, such as exchange between gas, liquid, and solid phases. Small variations in the isotope-amount ratio n(22Ne)/n(20Ne) have been used to examine gas-liquid exchange processes during groundwater recharge (water moving downward from the surface) and discharge,,.
Some 21Ne and 22Ne form naturally in the Earth’s crust largely by reactions of 18O and 19F in minerals with neutrons and alpha particles emitted from uranium and thorium decay, called nucleogenic neon isotopes,. In addition, neon isotopes can form at the surface of the Earth and in extraterrestrial bodies by cosmic-ray-induced spallation reactions on magnesium, silicon, aluminum, and sodium,. Analyses of all three stable neon isotopes may be used to distinguish these sources from primordial neon. The relative amounts of atmospheric neon and crustal nucleogenic neon isotopes in deep groundwaters and natural gases have been used in studies of solid-water-gas interactions and migration (Fig. IUPAC.10.1). The cosmogenic component is mainly detected in 21Ne and can be used to determine cosmic-ray exposure ages of rock samples, including meteorites exposed during travel through space and boulders exposed by melting of glacial ice (Fig. IUPAC.10.1).
22Ne is used to produce the radioisotope 22Na via the reaction 22Ne (p, n) 22Na. 20Ne has been used to produce the radioisotope 18F via the reaction 20Ne (d, 4He) 18F.