Nuklida · stabil · alami

Antimon-123 (¹²³Sb)

Antimon-123 (¹²³Sb) adalah isotop stabil antimon dengan 51 proton dan 72 neutron (nomor massa 123). Kelimpahan alaminya 0.4279(5).

Data nuklida

Unsur: Antimon (Sb, Z = 51)
Nomor massa (A): 123
Proton (Z): 51
Neutron (N): 72
Massa atom: 122.904215292 ± 0.000001456 u
Waktu paruh: Stabil
Mode peluruhan: Tidak meluruh
Kelimpahan alami: 0.4279(5)
Tahun penemuan: 1922
Sumber data: IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem

Molecules, atoms, and ions of the stable isotopes of antimony possess slightly different physical and chemical properties, and they commonly will be fractionated during physical, chemical, and biological processes, giving rise to variations in isotopic abundances and in atomic weights. There are measureable substantial variations in the isotopic abundances of antimony in natural terrestrial materials (Fig. IUPAC.51.1). The stable isotopes 121Sb and 123Sb have been used to measure movement of sediments and rocks originating from locations high in antimony. 121Sb and 123Sb move with the sediments and have been used as tracers in areas low in antimony to determine the originating location of certain metal/metalloid contaminants in streams,,.
123Sb is used to produce 124I (with a half-life of 100 h), which is used in radioimmunotherapy and also in positron emission tomography. It can be produced from the 123Sb (3He, 2n) 124I reaction. 121Sb and 123Sb can both be used for the production of 123I (with a half-life of 13.2 h) via 3He and alpha particle-induced reactions with 121Sb and 123Sb, although the most common production route is via 124Xe or 123Te.