Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium Iodide


Europium-doped strontium iodide scintillators offer a light yield exceeding 100,000 photons/MeV and excellent light yield proportionality, while at the same time, SrI2 is readily grown in single crystal form. Thus far, our collaboration has demonstrated an energy resolution with strontium iodide of 2.6% at 662 keV and 7.6% at 60 keV, and we have grown single crystals surpassing 30 cm3 in size (with lower resolution). Our analysis indicates that SrI2(Eu) has the potential to offer 2% energy resolution at 662 keV with optimized material, optics, and read-out. In particular, improvements in feedstock purity may result in crystal structural and chemical homogeneity, leading to improved light yield uniformity throughout the crystal volume, and consequently, better energy resolution. Uniform, efficient light collection and detection, is also required to achieve the best energy resolution with a SrI2(Eu) scintillator device.

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  1. 1.

    R. Hofstadter, E. W. O’Dell, and S. T. Schmidt, IEEE Trans. Nucl. Sci. NS-11, p. 12 (1964).

    Article  Google Scholar 

  2. 2.

    R. Hofstadter, “Europium-activated Strontium Iodide Scintillators,” US Patent 3,373,279, (1968).

  3. 3.

    N.J. Cherepy, G. Hull, T.R. Niedermayr, A. Drobshoff, S.A. Payne, U.N. Roy, Y. Cui, A. Bhattacharaya, M. Harrison, M. Guo, M. Groza, A. Burger, “Barium iodide single-crystal scintillator detectors,” Proc. SPIE, vol. 6706, p. 670616 (2007).

    Article  Google Scholar 

  4. 4.

    J. Selling, M.D. Birowosuto, P. Dorenbos, S. Schweizer, “Europium-doped barium halide scintillators for x-ray and γ-ray detections,” J. Appl. Phys., vol. 101, p.034901, (2007).

    Article  Google Scholar 

  5. 5.

    N.J. Cherepy, G. Hull, A. Drobshoff, S.A. Payne, E. van Loef, C. Wilson, K. Shah, U.N. Roy, A. Burger, L.A. Boatner, W-S Choong, W.W. Moses “Strontium and Barium Iodide High Light Yield Scintillators,” Appl. Phys. Lett. vol. 92, p. 083508, (2008).

    Article  Google Scholar 

  6. 6.

    R. Hawrami, M. Groza, Y.Cui, A. Burger, M.D Aggarwal, N. Cherepy and S.A. Payne, “SrI2 a Novel Scintillator Crystal for Nuclear Isotope Identifiers,” Proc. SPIE, Vol. 7079, 70790 (2008).

    Article  Google Scholar 

  7. 7.

    CM Wilson, EV Van Loef, J. Glodo, N. Cherepy, G. Hull, SA Payne, W.-S. Choong, WW Moses, KS Shah, “Strontium iodide scintillators for high energy resolution gamma ray spectroscopy,” Proc. SPIE, Vol. 7079, 707917, (2008).

    Article  Google Scholar 

  8. 8.

    NJ Cherepy, SA Payne, SJ Asztalos, G Hull, JD Kuntz, T Niedermayr, S Pimputkar, JJ Roberts, RD Sanner, TM Tillotson, E van Loef, CM Wilson, KS Shah, UN Roy, R Hawrami, A Burger, LA Boatner, W.-S. Choong, WW Moses, “Scintillators with Potential to Supersede Lanthanum Bromide,” IEEE Trans. Nucl. Sci. (in press).

  9. 9.

    E.V.D. van Loef, C.M. Wilson N.J. Cherepy, G. Hull, S.A. Payne, W- S. Choong, W.W. Moses, K.S. Shah, “Crystal Growth and Scintillation Properties of Strontium Iodide Scintillators”, IEEE Trans. Nucl. Sci. (in press).

  10. 10.

    G. Hull, S. Du, T. Niedermayr, S. Payne, N. Cherepy, A. Drobshoff, and L. Fabris “Light Collection Optimization in Scintillator Based Gamma-Ray Spectrometers,” Nucl. Instr. Meth. A, vol. 588, p. 384, 2008.

    CAS  Article  Google Scholar 

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Correspondence to Nerine Cherepy.

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Cherepy, N., Payne, S.A., Hawrami, R. et al. Prospects for High Energy Resolution Gamma Ray Spectroscopy with Europium-Doped Strontium Iodide. MRS Online Proceedings Library 1164, 1104 (2009).

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