Nuklida · radioaktif
Natrium-22 (²²Na)
Natrium-22 (²²Na) adalah isotop radioaktif natrium dengan 11 proton dan 11 neutron (nomor massa 22). Waktu paruhnya 2,6019 tahun (± 0,0006 tahun), meluruh terutama lewat peluruhan beta plus (β⁺).
Data nuklida
- Unsur
- Natrium (Na, Z = 11)
- Nomor massa (A)
- 22
- Proton (Z)
- 11
- Neutron (N)
- 11
- Massa atom
- 21.994437547 ± 0.000000141 u
- Waktu paruh
- 2,6019 tahun (± 0,0006 tahun)
- Mode peluruhan
- Peluruhan beta plus (β⁺) ( 100 %), Penangkapan elektron (ε) ( 9,43 %)
- Inti anak
- Neon-22 (²²Ne), Neon-22 (²²Ne)
- Tahun penemuan
- 1935
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop natrium
- Both 22Na and 24Na have been used as radioactive tracers to study electrolytes in the human body,,.
- 22Na is a cosmogenic isotope with a half-life of 2.6 years that has been used to study the residence time of water in freshwater basins. It has been used for dating of young (up to a few decades old) surface water and groundwater (Fig. IUPAC.11.1).
- 22Na is used as a source to calibrate positron emission tomography (PET) imaging scanners to check that the instruments are functioning properly.
Isotop natrium lainnya
¹⁷Na, ¹⁸Na, ¹⁹Na, ²⁰Na, ²¹Na, ²³Na, ²⁴Na, ²⁵Na, ²⁶Na, ²⁷Na, ²⁸Na, ²⁹Na, ³⁰Na, ³¹Na, ³²Na, ³³Na, ³⁴Na, ³⁵Na, ³⁶Na, ³⁷Na, ³⁸Na, ³⁹Na