Nuklida · radioaktif · alami
Rubidium-87 (⁸⁷Rb)
Rubidium-87 (⁸⁷Rb) adalah isotop radioaktif rubidium dengan 37 proton dan 50 neutron (nomor massa 87). Waktu paruhnya 49,7 miliar tahun (± 0,3 miliar tahun), meluruh terutama lewat peluruhan beta minus (β⁻). Kelimpahan alaminya 0.2783(2).
Data nuklida
- Nomor massa (A)
- 87
- Proton (Z)
- 37
- Neutron (N)
- 50
- Massa atom
- 86.909180529 ± 0.000000006 u
- Waktu paruh
- 49,7 miliar tahun (± 0,3 miliar tahun)
- Mode peluruhan
- Peluruhan beta minus (β⁻) ( 100 %)
- Inti anak
- Stronsium-87 (⁸⁷Sr)
- Kelimpahan alami
- 0.2783(2)
- Tahun penemuan
- 1921
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop rubidium
- 87Rb (with a half-life of 4.97×1010 years) is a long-lived radioisotope that is transformed into 87Sr by emission of a beta-minus particle (an electron) and an antineutrino. From the abundance of 87Sr and the Rb/Sr amount ratio in a rock, its age of crystallization can be calculated. Rb/Sr dating is one of the most widely employed techniques for dating geological samples.
Isotop rubidium lainnya
⁷¹Rb, ⁷²Rb, ⁷³Rb, ⁷⁴Rb, ⁷⁵Rb, ⁷⁶Rb, ⁷⁷Rb, ⁷⁸Rb, ⁷⁹Rb, ⁸⁰Rb, ⁸¹Rb, ⁸²Rb, ⁸³Rb, ⁸⁴Rb, ⁸⁵Rb, ⁸⁶Rb, ⁸⁸Rb, ⁸⁹Rb, ⁹⁰Rb, ⁹¹Rb, ⁹²Rb, ⁹³Rb, ⁹⁴Rb, ⁹⁵Rb, ⁹⁶Rb, ⁹⁷Rb, ⁹⁸Rb, ⁹⁹Rb, ¹⁰⁰Rb, ¹⁰¹Rb, ¹⁰²Rb, ¹⁰³Rb, ¹⁰⁴Rb