Radon-222 (²²²Rn)

Data nuklida

Unsur

Radon (Rn, Z = 86)

Nomor massa (A)

222

Proton (Z)

86

Neutron (N)

136

Massa atom

222.017576017 ± 0.000002086 u

Waktu paruh

3,8215 hari (± 0,0002 hari)

Mode peluruhan

Peluruhan alfa (α) ( 100 %)

Inti anak

Polonium-218 (²¹⁸Po)

Tahun penemuan

1899

Sumber data

IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem

Kegunaan isotop radon

• Both 220Rn and 222Rn (with half-lives of 56 s and 3.8 days, respectively) are used to study underground environmental and atmospheric gaseous-transport processes,,. The interaction of radon with streams and rivers enables it to be used as a tracer in groundwater studies (Fig. IUPAC.86.1). 222Rn has a short residence time in streams and river channels, which leads to radon loss. As a result, if an area of a stream or river has a high concentration of radon, it suggests that there are local groundwater inputs,,. In a deep (100 m) contaminated aquifer at a refinery site in Mexico, where the contaminated source was too deep to be directly accessible for sampling, Schubert et al. collected groundwater samples from a few wells available at the site. They used the partitioning of the natural tracer 222Rn between uncontaminated groundwater and the NAPL (non-aqueous phase-liquid, such as oil, gasoline, and petroleum) source zone, and they were able to approximately identify the location of the NAPL source zone. As noted in Section 4.88.1, 222Rn has been used to quantify submarine groundwater discharge.
• 222Rn has been used as a tool to date groundwater in combination with other isotopes or elemental ratios (i.e. helium/radon and xenon/radon amount ratios),.

Isotop radon lainnya

¹⁹³Rn, ¹⁹⁴Rn, ¹⁹⁵Rn, ¹⁹⁶Rn, ¹⁹⁷Rn, ¹⁹⁸Rn, ¹⁹⁹Rn, ²⁰⁰Rn, ²⁰¹Rn, ²⁰²Rn, ²⁰³Rn, ²⁰⁴Rn, ²⁰⁵Rn, ²⁰⁶Rn, ²⁰⁷Rn, ²⁰⁸Rn, ²⁰⁹Rn, ²¹⁰Rn, ²¹¹Rn, ²¹²Rn, ²¹³Rn, ²¹⁴Rn, ²¹⁵Rn, ²¹⁶Rn, ²¹⁷Rn, ²¹⁸Rn, ²¹⁹Rn, ²²⁰Rn, ²²¹Rn, ²²³Rn, ²²⁴Rn, ²²⁵Rn, ²²⁶Rn, ²²⁷Rn, ²²⁸Rn, ²²⁹Rn, ²³⁰Rn, ²³¹Rn

Pelajari

Kimia inti Simulasi peluruhan ²²²Rn Bagan nuklida