Erbium-169 (¹⁶⁹Er)

Data nuklida

Unsur

Erbium (Er, Z = 68)

Nomor massa (A)

169

Proton (Z)

68

Neutron (N)

101

Massa atom

168.934598444 ± 0.000000326 u

Waktu paruh

9,392 hari (± 0,018 hari)

Mode peluruhan

Peluruhan beta minus (β⁻) ( 100 %)

Inti anak

Tulium-169 (¹⁶⁹Tm)

Tahun penemuan

1956

Sumber data

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

Kegunaan isotop erbium

• 169Er (with a half-life of 9.4 days) is used in radiosynovectomy, which is a regularly practiced radiotherapy, on rheumatoid arthritis patients whose condition is resistant to standard methods of treatment (Fig. IUPAC.68.1). Rheumatoid arthritis is a chronic, inflammatory, autoimmune disease of the joint capsule (synovial sac), which is lined with a thin membrane called the synovium, of an individual’s moveable joints (synovial joints). In radiosynovectomy, the radiopharmaceutical called 169Er- citrate colloid, which contains colloidal particles that are labeled with β-emitting 169Er, is directly injected into the synovial cavity (the cavity between the bones in a moveable joint inside of the synovium) of the affected joint. These radioactive-colloid particles are then phagocytized (engulfed) by macrophage-like synoviocytes as well as other phagocytizing inflammatory cells in the patient’s synovium. Necrosis (tissue death) and the inhabitation of cell proliferation (increase in number of cells) result from the radiation of the synovium and therefore, temporarily halts synovitis (which is the condition of when the synovium thickens with inflammation) and improves synovial joint function,,,.

Isotop erbium lainnya

¹⁴²Er, ¹⁴³Er, ¹⁴⁴Er, ¹⁴⁵Er, ¹⁴⁶Er, ¹⁴⁷Er, ¹⁴⁸Er, ¹⁴⁹Er, ¹⁵⁰Er, ¹⁵¹Er, ¹⁵²Er, ¹⁵³Er, ¹⁵⁴Er, ¹⁵⁵Er, ¹⁵⁶Er, ¹⁵⁷Er, ¹⁵⁸Er, ¹⁵⁹Er, ¹⁶⁰Er, ¹⁶¹Er, ¹⁶²Er, ¹⁶³Er, ¹⁶⁴Er, ¹⁶⁵Er, ¹⁶⁶Er, ¹⁶⁷Er, ¹⁶⁸Er, ¹⁷⁰Er, ¹⁷¹Er, ¹⁷²Er, ¹⁷³Er, ¹⁷⁴Er, ¹⁷⁵Er, ¹⁷⁶Er, ¹⁷⁷Er, ¹⁷⁸Er, ¹⁷⁹Er, ¹⁸⁰Er

Pelajari

Kimia inti Simulasi peluruhan ¹⁶⁹Er Bagan nuklida