GAS GC-IMS, User Manual

Page: 186 / 214

GC-IMS
– User Manual
186/214
9.3 Ionisiation Source Specification
INFORMATION!
The permission and exemption limits are regulated by the Radiation
Protection Ordinance and the European Union Council Directive
96/26/EURATOM in accordance with the regulations of the
International Atomic Energy Authority (IAEA).
Source Type Tritium H
3
, Solid-state bonded
Activity Below the exemption limit of 1 GBq for tritium
acc. to Table B (column 2) of Article 26, of the
Directive 2013/59 EURATOM of December 5
th
,
2013
Radiation Type
β
-
-Radiation
Radiation Energy Average energy: 5.68 keV
Maximum energy: 18.7 keV
Full Duration Half Maximum
(FDHM) 12.3 years
Bracking radiation 2 x 10
-7
(mSv / h x GBq)
H
Brake
= A x h
Br
x (1m / r)
2
hBr = 0.257 x 10
-4
x (E
βmax / MeV) x 2
Attenuation of Radiation Air: 4 mm
Water: < 100 µm
Tissue: < 100 µm