Entsys Technologies Co.,Ltd

Ytterbium-169 sources

The SENTINEL range of sources and source holders caters for most indutrial applications using gamma radiography.
A choice of isotopes provides for the widely varying requirements demanded by different materials and site conditions. Sources with outputs ranging from less than one curie up to several hundred are available - all precision contructed to ensure the highest possible specific activities and the smallest focal spot sizes.
Source exchange is available as a service either on-site or when source projectors are returned to SENTINEL for inspection or overhaul. Sources can be shipped in the source projector or in a suitable returnable transport container.

Ytterbium-169 sources are constructed using a spherical ceramic pellet of ytterbium oxide in a welded titanium alloy capsule.

Characteristics

Optimum working thickness steel	2.5mm to 15mm
light alloys	7.5 to 45mm
other materials	0.02 to 0.12g/mm²

Half life	32.0 days
Principle gamma energies	0.008 to 0.308MeV
Output at 1 metre for a nominal equivalent activity of 37GBq (1Ci)
Exposure rate	0.125R/h
Air kerma rate	0.303μGy/s


*Connector* The patent connector design is constructed from hardened steel and manufactred to critical dimensional tolerances. The force of the integral stainless steel sprung plunger is tensioned precisely to always provide a secure and positive connection to the control drive cable. the assembly, swaged to the teleflex cable, has an unmatched record of safety and wear resistance in the industrial radiographic industry.
*Capsule assembly* Sources capsules are constructed using either stainless steel or titanium alloy hermetically seald by tungsten inert gas fusin welding and finished to exacting standards. Every capsule is subjected to a series of quality inspection tests to ensure weld integrity and uniform wall thickness.
		Stop ball The stop ball, made from stainless steel, is precision drilled, accurately positioned and secured in place with three point high pressure swaging. Precise positioning of the stop ball ensures that the source can be accurately and safely stored within the projector. *Flexible cable* The source capsule is securely attached to a distortion and fray resistant teleflex cable by swaging under high pressure. The resulting bond is tensile tested for optimum strength well beyond operating limits. The teleflex cabling, consisting of spiral wound flexible steel, has proven to be consistently durable and reliable over many years of use.