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

Mea

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Typ

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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 ?)