Gamma Chamber 5000 is a compact self shielded cobalt-60 gamma
irradiator providing an irradiation volume of approximately 5000cc. There are other varaitions of the Gamma Chambers which are also available.
The material for irradiation is placed in an irradiation chamber located in the vertical drawer inside the lead flask. This drawer can be moved up
and down with the help of a system of motorised drive which enables precise positioning of the irradiation chamber at the centre of the
Radiation field is provided by a set of stationary cobalt-60 sources placed in a cylindrical cage.
The sources are doubly encapsulated in corrosion resistant stainless steel pencils and are tested in accordance with international standards.
Two access holes of 8 mm diameter are provided in the vertical drawer for introduction of service sleeves for gases, thermocouple, etc.
A mechanism for rotating/stirring samples during irradiation is also incorporated. The lead shield provided around the source is adequate
to keep the external radiation field well within permisible limits. The Gamma Chamber 5000 unit can be installed in a room measuring 4m X 4m X 4m.
Safe and self-shielded: The shielding provided is adequate to limit the radiation field on the
external surface of the unit, well within the permissible levels. No additional shielding is required for its installation and use.
Automatic control of irradiation
time: Built-in timer provides accurate control of irradiation
time from 6 seconds onwards. The unit can also be operated manually.
Solid state programmable controls have been provided. In the event
of power failure battery backup displays the programmes.
Manual control of irradiation
temperature: It is possible to irradiate samples at low or high
temperature by circulating liquid nitrogen or hot air. These can be
introduced through the service sleeves provided in the vertical
drawer. The irradiation temperature is sensed by a thermocouple and
displayed on the panel.
Remote operation: An additional
table top control panel is provided for remote operation in addition
to the normal one provided on the unit.
Dose uniformity: Stationary
source pencils, symmetrically placed in a cylindrical cage ensure
good uniformity of radiation field in the sample chamber. In
addition a mechanism is also provided for rotating/stirring samples
Easy loading and unloading of
samples: Sample chamber extends to a convenient height for easy
loading and unloading of samples.
Safety assurance: The design of
Gamma Chamber conforms to American National Standards
ANSI N433.1-1977 for safe design and use of self-contained dry
source storage gamma irradiators(Category I).
It also meets the
requirements of type B(U) package for safety in transport of
radioactive materials as per AERB code No.SC/TR-1, 1986 of Atomic
Energy Regulatory Board of INDIA.
Gamma Chamber is a versatile equipment for
research studies in many fields such as:
Preservation of tissue grafts
Sterile male insect technique
Biological and genetic effects of
Radiation effects on materials
Modification of properties of
Gamma Chamber can also be used in many other research applications which require irradiation of materials with ionizing radiations to varying doses
Accessories & Other Supplies :
Attenuators to bring down the radiation dose in the sample
chamber by 25% or 50% - are available on request.
Ceric-cerous dosimeters are available in sets of 100 ampules
of 2 ml. The Kilo Gray Gamma Dosimeter system to read out the
dose delivered, is also available.
Biological indicators inoculated with 106 - 107
spores of Bacillus Pumilus ATCC 14884, on paper disc
are available in multiples of 100 numbers (50 pairs). These are
useful when sterility is to be construed without subjecting the
sample to destructive sterility test.
BRIT can undertake refurbishing of old units and provide replenishment of cobalt-60 source in the unit.
Specifications of Gamma Chamber 5000 :
Maximum Co-60 source capacity
518 TBq (14000 Ci)
Dose rate at maximum capacity
~ 9 kGy/hr (0.9 Mega Rad/hr)
at the center of sample chamber