Kobalt-57 (⁵⁷Co)

Data nuklida

Unsur

Kobalt (Co, Z = 27)

Nomor massa (A)

57

Proton (Z)

27

Neutron (N)

30

Massa atom

56.936289819 ± 0.000000553 u

Waktu paruh

271,811 hari (± 0,032 hari)

Mode peluruhan

Penangkapan elektron (ε) ( 100 %)

Inti anak

Besi-57 (⁵⁷Fe)

Tahun penemuan

1941

Sumber data

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

Kegunaan isotop kobalt

• 60Co is a radioactive metal isotope that is used in cancer treatments by radiotherapy. When 60Co undergoes radioactive decay, high-energy gamma rays (energies of 1.17 MeV and 1.33 MeV) are emitted and have been used in brachytherapy to treat various types of cancer. Brachytherapy (brachy is Greek meaning “short distance”) is a method of radiation treatment in which sealed sources are used to deliver a radiation dose at a distance of up to a few centimeters by surface, intracavitary (insertion of the radioactive isotope in a body cavity), or interstitial (between cells) application. 60Co is used as a source of high-energy ionizing gamma radiation that can be directed to cancer cells from a device outside the body (external radiotherapy). 60Co (and sometimes 57Co and 58Co, with half-lives of 0.75 year and 71 days, respectively) is the key component of the Schilling test, which is a method for determining whether a patient’s body is making and using vitamin B12 properly. The cobalt isotope is used to label cobalt in vitamin B12 to monitor how the body processes this essential vitamin. 57Co delivers the smallest radiation dose of all the cobalt isotopes. As a result, it has been used in the past for imaging and estimating organ size and location and in evaluating tumors of the head and neck,,,,.

Isotop kobalt lainnya

⁴⁷Co, ⁴⁸Co, ⁴⁹Co, ⁵⁰Co, ⁵¹Co, ⁵²Co, ⁵³Co, ⁵⁴Co, ⁵⁵Co, ⁵⁶Co, ⁵⁸Co, ⁵⁹Co, ⁶⁰Co, ⁶¹Co, ⁶²Co, ⁶³Co, ⁶⁴Co, ⁶⁵Co, ⁶⁶Co, ⁶⁷Co, ⁶⁸Co, ⁶⁹Co, ⁷⁰Co, ⁷¹Co, ⁷²Co, ⁷³Co, ⁷⁴Co, ⁷⁵Co, ⁷⁶Co, ⁷⁷Co, ⁷⁸Co

Pelajari

Kimia inti Simulasi peluruhan ⁵⁷Co Bagan nuklida