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High Efficient Scintillators for Nuclear Physics and Medicine

#3019


R&D Studies for Growing Long CeF3, Cerium-doped BaF2 and CaF2 Single Crystals as High Effective Scintillators to Be Used in Nuclear Physics and Medicine

Tech Area / Field

  • CHE-IND/Industrial Chemistry and Chemical Process Engineering/Chemistry
  • MAT-SYN/Materials Synthesis and Processing/Materials

Status
3 Approved without Funding

Registration date
10.03.2004

Leading Institute
VNIIKhT (Chemical Technology), Russia, Moscow

Supporting institutes

  • Joint Institute of Nuclear Research, Russia, Moscow reg., Dubna\nInstitute of General Physics named after A.M. Prokhorov RAS / Laser Materials and Technology Research Center, Russia, Moscow

Collaborators

  • Tohoku University / Laboratory of Nuclear Science, Japan, Sendai\nInstituto de Fisica Corpuscular, Spain, Valencia\nOsaka University / Research Center for Nuclear Physics, Japan, Osaka

Project summary

This Project is a result of the joint effort of three institutes: All-Russia Research Institute of Chemical Technology (ARRICT), Joint Institute for Nuclear Research (JINR) and Laser Materials and Technology Research Center of Prokhorov General Physics Institute (LMTRC GPI) on the basis of their technological and scientific potential.

The goal of our project is the creation of high-efficient scintillators for nuclear physics and medicine,. in particular, for electromagnetic calorimeter (EC) in the Research Center for Nuclear Physics (RCNP) (Osaka). The project includes development of the technology of the growth of the CeF3 and cerium-doped BaF2 and CaF2 crystals. Multiple attempts to grow these crystals of large size were undertaken previously. However, no reliable technique of the growth of large crystals with sufficiently good quality was developed. Within the framework of the proposed project, Participants are going to develop a method of mass production of large single crystals of the listed fluorides. We plan to produce a pilot series of these single crystals with dimensions 2.5 ґ 2.5 ґ 30 cm3.

The production of large uniform CeF3 and cerium-doped BaF2 and CaF2 crystals will be based on the experience of scientists of ARRICT and GPI in original technology of synthesis of polycrystalline high-purity (99.99%) anhydrous fluoride powders. As a result of the project, the following valuable scientific and engineering problems will be solved:

1. The growth technology of large (2.5 ґ 2.5 ґ 30) cm3 optically uniform of CeF3 cerium-doped BaF2 and CaF2 single crystals by the directional crystallization method will be developed;

2. Methods of quality control of the grown CeF3 single crystals will be developed on the basis of modern physical methods of investigations including electron and X-ray spectroscopy and absorption, fluorescent, and kinetic spectral analysis;

3. Pilot series of large uniform CeF3 and cerium-doped BaF2 and CaF2 crystals with stable and controlled parameters will be grown and experimental detectors of high-energy nuclear particles with high o characteristics for accelerators and positron tomographs will be produced.

The pilot series of large CeF3 cerium-doped BaF2 and CaF2 single crystals with stable and controlled parameters will be produced for the first time in the world.

The work plan will be carried out in the following way: ARRICT and LMTRC GPI are responsible for CeF3 growing and large crystal production technology development. JINR staff is responsible for testing of crystal quality and measurement of crystal characteristics measurement, as well as for delivering of the crystals to the Research Center for Nuclear Physics (Osaka) and for the beam test there. JINR also will participate in the crystal growth technology development with ARRICT. JINR will coordinate the project and ensure the information exchange between Participants.


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