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X-ray radiation sources: Barium-133 / Ba-133

¹³³Ba

Radionuclide characteristics

Half-life, days: 3848.7 ± 1.2

Photon energy:

Cs XK_α2	30.625 keV (34.0±0.4%)
Cs XK_α1	30.973 keV (62.8±0.7%)
Cs XK_β2	34.92-35.26 keV (18.2±0.2%)
Cs XK_β1	35.82-35.97 keV (4.6±0.1%)
γ₁	53.1622±0.0006 keV (2.14±0.03%)
γ₂	79.6142±0.0012 keV (2.65±0.05%)
γ₃	80.9979±0.0011 keV (32.9±0.3%)
γ₄	276.3989±0.0012 keV (7.16±0.05%)
γ₅	302.8508±0.0005 keV (18.34±0.13%)
γ₆	356.0129±0.0007 keV (62.05±0.19%)
γ₇	383.8485±0.0012 keV (8.94±0.06%)

Reference data:
Update of x ray and gamma ray decay data standards for detector calibration and other applications (IAEA), volume 1, 2007

¹³³Ba is incorporated in a ceramic matrix, placed in the stainless steel inner and sealed in a welded stainless steel capsule with brazed beryllium window.

Code	Nominal activity *		Typical photon output for Cs KX *, (ph/sec) 10^-4 steradian	DxH, mm	dxh, mm
Code	mCi	MBq	Typical photon output for Cs KX *, (ph/sec) 10^-4 steradian	DxH, mm	dxh, mm
XBa3.06	1	37	0.3x10³	8x5	4x1.2
	3	111	0.9x10³
	5	185	1.5x10³
	10	370	3.0x10³
	20	740	5.5x10³
	30	1110	8.0x10³

* Tolerance: ±10%

ISO classification: С65344

Recommended working life: 15 years

Other dimensions and activities are available on request

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