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Gamma radiation sources: Barium-133 / Ba-133

133Ba
Radionuclide characteristics
Half-life, days: 3848.7 ± 1.2
Photon energy:

Cs XKα230.625 keV (34.0±0.4%)
Cs XKα130.973 keV (62.8±0.7%)
Cs XKβ234.92-35.26 keV (18.2±0.2%)
Cs XKβ135.82-35.97 keV (4.6±0.1%)
γ153.1622±0.0006 keV (2.14±0.03%)
γ279.6142±0.0012 keV (2.65±0.05%)
γ380.9979±0.0011 keV (32.9±0.3%)
γ4276.3989±0.0012 keV (7.16±0.05%)
γ5302.8508±0.0005 keV (18.34±0.13%)
γ6356.0129±0.0007 keV (62.05±0.19%)
γ7383.8485±0.0012 keV (8.94±0.06%)
133Ba is incorporated in ceramic matrix and sealed in a welded stainless steel capsule.


Code Nominal
activity *
DxH, mm dxh, mm
mCi MBq
GBa3.11 ** 0.03-3.00 1-111 3x3 2.1x1.5
GBa3.12 0.03-3.00 1-1113x10 2.1x1.5
GBa3.13 1-10
37-370
4x10 3.1x1.5
GBa3.14 1-10
37-370
7x10 5x2.5
GBa3.15 1-10
37-370
8x5 4x1.2

* Tolerance: ±10%

** ISO classification: 64344

ISO classification: 64444

Recommended working life: 15 years

Other dimensions and activities are available on request