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ILIAS
Physics in deep underground laboratories
JRA1 : Low background techniques
WP4 : Radiopurity of materials
Pía Loaiza Laboratoire Souterrain de Modane, France
ILIAS meeting, September 2004, Edinburg
Presentation of WP4 : Radiopurity of materials
WP4 - ILIAS meeting, Sept. 2004, Edinburgh
WP4 : R&D on radiopurity of materials and purification techniques
Objectives :
• Collect existing information on radioactive contamination of materials typically used in the construction of detectors.
• Implementation of a database containing collected data as well as new measurements. • Development and test of purification techniques to improve radiopurity. Already planned : underground facility for electroforming copper at LSC. Radon purification system at LSM.
• Collect data on cosmogenic activation and perform new measurements. Development of MC codes to analyze the cosmogenic activation of different materials.
Deliverables :
First test version of data base
Other objectives :
• Systematic comparison of measurements in different labs
• Compilation of all Ge sensitivity (WP1)
WP4 - ILIAS meeting, Sept. 2004, Edinburgh
18 first months JRA1
WP4 - ILIAS meeting, Sept. 2004, Edinburgh
http://www-lsm.in2p3.fr/ilias/ilias.html Information on WP4
Database on radiopurity of materials
Welcome to the database on radiopurity of materials
This page provides acces to radionuclide concentration in materials commonly used in low background experimental set-ups. The measurements have been performed by groups involved in experiments requiring ultra low background environments.
While this data is an useful guide for material selection, the radionuclide concentration may vary depending on the lot. Therefore, it is necesary to control all used materials when building low background set-ups
Database search
WP4 - ILIAS meeting, Sept. 2004, Edinburgh
Proposed data to be included in the database
And to state clearly how the errors were
obtained
Construction materials:
For components, such as resistors, connectors, etc the same data given in dpm/item
Material TypeProvider
and Ref Radionuclide concentration in dpm/kg
238U series 232Th series
234Th 214Pb 214Bi 228Ac 212Pb 208Tl 235U 210Pb 137Cs 40K 60Co 57Co 54Mn
Cooper OFHC VA 0010563
< 0.3 <0.12 <0.3 <0.2 0.03 ± 0.01
0.001 ± 0.0009
It is important to give as much information as posible to identify the material
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WP4 - ILIAS meeting, Sept. 2004, Edinburgh
We need:
• Contact person(s) in each laboratory.
• Existing bibliography on measurements of radioactive contamination in materials
• Data including information detailed in previous slide (plus more information proposed?) (exchange format ?)