Skip to main content Accessibility help
×
Home

Dysprosium-Containing Nanocrystals for Thermal Neutron Detection

  • Antonio C. Rivera (a1), Natasha N. Glazener (a1), Nathaniel C. Cook (a1), Nathan J. Withers (a1), John B. Plumley (a1), Brian A. Akins (a1), Ken Carpenter (a2), Gennady A. Smolyakov (a1), Robert D. Busch (a2) and Marek Osiński (a1)...

Abstract

We propose a novel concept of optical detection of thermal neutrons in a passive device that exploits transmutation of Dy-164, a dominant, naturally occurring isotope of dysprosium, into a stable isotope of either holmium Ho-165 or erbium Er-166. Combination of the high thermal neutron capture cross section of ~2,650 barns and transmutation into two other lanthanides makes Dy-164 a very attractive alternative to traditional methods of neutron detection that will be completely insensitive to gamma irradiation, thus reducing greatly the likelihood of false alarms. The optically enabled neutron detection relies on significant differences in optical properties of Dy, Ho, and Er that are not sensitive to a particular isotope, but change considerably from one element to another. While the concept applies equally well to bulk materials and to nanocrystals, nanocrystalline approach is much more attractive due to its significantly lower cost, relative ease of colloidal synthesis of high quality nanocrystals (NCs), and superior optical and mechanical properties of NCs compared to their bulk counterparts. We report on colloidal synthesis of DyF3 NCs, both doped and undoped with Ho and co-doped with Ce and Eu to enhance their optical properties. We also report on DyF3:10%Ce and DyF3:10%Eu NCs irradiated with thermal neutrons from a Cf-252 source and their optical characterization.

Copyright

Corresponding author

References

Hide All
1. Knoll, G. F., Radiation Detection and Measurement, 3rd Ed., John Wiley & Sons, pp. 507-520 (2000).
2. Kramer, D., Physics Today, pp. 2022, May 2011.
3. Firestone, R. B., Berkeley Laboratory Isotopes Project, E. O. Lawrence Berkeley National Lab., http://ie.lbl.gov/education/isotopes.htm
4. McLaren, A. B., Hetherington, E. L. R., Maddalena, D. J., and M.Snowdon, G., Australian Nuclear Science and Technology Organization, Lucas Heights Research Laboratories, Report ANSTO/E673, (1988).
5. Furetta, C., Tuyn, J. W. N., Lewis, F., Azorin, J., and Driscoll, C. M. H., Radiation Protection Dosimetry 17, pp. 161164 (1986).
6. Withers, N. J., Plumley, J. B., Akins, B. A., Rivera, A. C., Medina, G., Smolyakov, G. A., Timmins, G. S., and Osiński, M., Colloidal Quantum Dots for Biomedical Applications V (Osiński, M., Parak, W. J., Jovin, T. M., and Yamamoto, K., Eds.), San Francisco, CA, 2325 Jan. 2010, Proc. SPIE 7575, Paper 75750Z (10 pp.).
7. Hoffmann, M. M., Young, J. S., and Fulton, J. L., J. Nuclear Science, 35(16) 41774183 (2000).

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed