Publication: Enhanced time response of 1-in. LaBr_3(Ce) crystals by leading edge and constant fraction techniques
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2015-09-21
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Elsevier Science BV
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We have characterized in depth the time response of three detectors equipped with cylindrical LaBr_3(Ce) crystals with dimensions of 1-in. in height and 1-in. in diameter, and having nominal Ce doping concentration of 5%, 8% and 10%. Measurements were performed at Co-60 and Na-22 gamma-ray energies against a fast BaF2 reference detector. The time resolution was optimized by the choice of the photomultiplier bias voltage and the fine tuning of the parameters of the constant fraction discriminator, namely the zero-crossing and the external delay. We report here on the optimal time resolution of the three crystals. It is observed that timing properties are influence('by the amount of Ce doping and the crystal homogeneity. For the crystal with 8% of Ce doping the use of the ORTEC 935 CFD at very shorts delays in addition to the Hamamatsu R9779 PMT has made it possible to improve the LaBr3(Ce) time resolution from the best literature value at Co-60 photon energies to below 100 ps. (C) 2015 Elsevier B.V. All rights reserved.
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© 2015 Elsevier B.V.
This work was partially supported by the Spanish MINECO through Projects FPA2010-17142, FPA2013-41267-P and Consolider-CPAN CSD-2007-00042. Funding by the ERA-NET NuPNET via Spanish Project PRI-PIMNUP-2011-1338 (FATIMA-NuPNET) and Bulgarian Project DNS7RP01-4 (FATIMA-NuPNET) is also recognized. V.V. and H.M. acknowledge the financial aid by the Consolider-CPAN CSD-2007-00042 project. The electronics for the test bench and the reference detectors were provided by the Fast Timing Pool of Electronics and MASTICON.
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[1] E. V. V. Loef, P. Dorenbos, C. W. E. van Ejik, K. Krämer, H. U. Güdel, Scintillation properties of LaBr3:Ce3+ crystals: Fast, efficient and high-energy-resolution scintillators, Nuclear Instruments and Methods in Physics Research A 486 (2002) 254–258.
[2] K. Shah, J. Glodo, M. Klugerman, W. Moses, S. Derenzo, M.Weber, LaBr3:Ce scintillators for Gamma-Ray spectroscopy, IEEE Transactions on Nuclear Science 50 (6) (2003) 2410–2413. doi:10.1109/TNS.2003.820614.
[3] S. Gobain, Brillance 380 Brochure.
[4] P. Dorenbos, Light output and energy resolution of Ce3+-doped scintillators, Nuclear Instruments and Methods in Physics Research Section A 486 (2002) 208–213.
[5] E. R. White, H. Mach, L. M. Fraile, U. Köster, O. Arndt, A. Blazhev, N. Boelaert, M. J. G. Borge, R. Boutami, H. Bradley, N. Braun, Z. Dlouhy, C. Fransen, H. O. U. Fynbo, C. Hinke, P. Ho, A. Joinet, A. Jokinen, Lifetime measurement of the 167.1 keV state in 41 Ar, Physical Review C 057303 (2007) 7–10. doi:10.1103/PhysRevC.76.057303.
[6] H. Mach, R. L. Gill, M. Moszýnski, A method for picosecond lifetime measurements for neutron-rich nuclei (1) Outline of the method, Nuclear Instruments and Methods in Physics Research A 280 (1989) 49–72.
[7] M. Moszýnski, H. Mach, A method for picosecond lifetime measurements for neutron-rich nucleI (2) Timing study with scintillation counters, Nuclear Instruments and Methods inPhysics Research A 277 (1989) 407–417.
[8] N. Mărginean, D. Balabanski, D. Bucurescu, S. Lalkovski, L. Atanasova, G. Căta-Danil, I. Căta-Danil, J. Daugas, D. Deleanu, P. Detistov, G. Deyanova, D. Filipescu, G. Georgiev, D. Ghită, K. Gladnishki, R. Lozeva, T. Glodariu, M. Ivascu, S. Kisyov, C. Mihai, R. Mărginean, A. Negret, S. Pascu, D. Radulov, T. Sava, L. Stroe, G. Suliman, N. Zamfir, Inbeam measurements of sub-nanosecond nuclear lifetimes with a mixed array of HPGe and LaBr_3Ce detectors, The European Physical Journal A 46 (3) (2010) 329–336. doi:10.1140/epja/i2010-11052-7.
[9] T. Alharbi, P. H. Regan, P. J. R. Mason, N. Mărginean, Z. Podolyák, A. M. Bruce, E. C. Simpson, A. Algora, N. Alazemi, R. Britton, M. R. Bunce, D. Bucurescu, N. Cooper, D. Deleanu, D. Filipescu, W. Gelletly, D. Ghită, T. Glodariu, G. Ilie, S. Kisyov, J. Lintott, S. Lalkovski, S. Liddick, C. Mihai, K. Mulholland, R. Mărginean, A. Negret, M. Nakhostin, C. R. Nita, O. J. Roberts, S. Rice, J. F. Smith, L. Stroe, T. Sava, C. Townsley, E. Wilson, V. Werner, M. Zhekova, N. V. Zamfir, Electromagnetic transition rates in the N=80 nucleus _138^58Ce, Phys. Rev. C 87 (2013) 014323. doi:10.1103/PhysRevC.87.014323.
[10] B. Olaizola, L. M. Fraile, H. Mach, A. Aprahamian, J. A. Briz, J. Cal-González, D. Ghită, U. Köster, W. Kurcewicz, S. R. Lesher, D. Pauwels, E. Picado, A. Poves, D. Radulov, G. S. Simpson, J. M. Udías, β^-decay of ^65Mn to ^65Fe, Phys. Rev. C 88 (2013) 044306. doi:10.1103/PhysRevC.88.044306.
[11] J.-M. Régis, G. Simpson, A. Blanc, G. de France, M. Jentschel, U. Köster, P. Mutti, V. Paziy, N. Saed-Samii, T. Soldner, C. Ur, W. Urban, A. Bruce, F. Drouet, L. Fraile, S. Ilieva, J. Jolie, W. Korten, T. Kr¨oll, S. Lalkovski, H. Mach, N. Marginean, G. Pascovici, Z. Podolyak, P. Regan, O. Roberts, J. Smith, C. Townsley, A. Vancraeyenest, N. Warr, Germanium-gated ϒ- ϒ fast timing of excited states in fission fragments using the exill-fatima spectrometer, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 763 (0) (2014) 210– 220. doi:http://dx.doi.org/10.1016/j.nima.2014. 06.004.
[12] L. M. Fraile, H. Mach, B. Olaizola, V. Paziy, E. Picado, J. J. Sanchez, J. M. Ud´ıas, J. J. Vaquero, V. Vedia, Assessment of new photosensors for fast timing applications with large scintillator detectors, in: Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE, 2011, pp. 72 –74. doi:10.1109/NSSMIC.2011.6154403.
[13] L. M. Fraile, H. Mach, V. Vedia, B. Olaizola, V. Paziy, E. Picado, J. Udías, Fast timing study of a CeBr3 crystal: Time resolution below 120 ps at 60Co energies, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 701 (0) (2013) 235– 242. doi:http://dx.doi.org/10.1016/j.nima.2012.11.009.
[14] L. M. Fraile, H. Mach, E. Picado, V. Vedia, J. Udías, Study of the time response of a LuAG(Pr) crystal for fast timing applications, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 713 (0) (2013) 27 – 32. doi:http://dx.doi.org/10.1016/j.nima.2013.02.015.
[15] V. Vedia, H. Mach, L. M. Fraile, J. M. Udías, Optimization ofthe Time Response of LaBr_3(Ce) Crystals, and its Dependence on Ce Concentration, in: JPS Conference Proceedings. ARIS 2014, Vol. Volume 6, 2015.
[16] L. M. Fraile, et.al, Technical Design Report for the DESPEC Fast Timing Array, unpublished (2015).
[17] B. Rubio, Z. Podolyák, M. Górska, J. Gerl, W. Korten, Fairexperiments-26 decay spectroscopy DESPEC at the new FAIRNUSTAR facility.
[18] Zsolt Podoly´ak, From RISING to HISPEC-DESPEC, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 266 (19-20) (2008) 4589–4594, proceedings of the XVth International Conference on Electromagnetic Isotope Separators and Techniques Related to their Applications. doi:http://dx.doi.org/10.1016/j.nimb.2008.05.106.
[19] FAIR, Facility for Antiproton and Ion Research in Europe, Planckstr. 1, 64291 Darmstadt, Germany. www.gsi.de/en/research/fair.htm.
[20] J. Glodo, W. W. Moses, W. M. Higgins, E. V. D. V. Loef, P. Wong, S. E. Derenzo, M. J. Weber, K. S. Shah, Effects of Ce Concentration on Scintillation Properties of LaBr3(Ce), IEEE Transactions on Nuclear Science 52 (5) (2005) 1805–1808.
[21] Hamamatsu Photonics, Photomultiplier Tube R9779 Specifications (2009).
[22] W. Drozdowski, P. Dorenbos, A. J. J. Bos, G. Bizarri, A. Owens, F. G. A. Quarati, CeBr3 Scintillator Development for Possible Use in Space Missions, IEEE Transactions on Nuclear Science 55 (3) (2008) 1391–1396.
[23] P. Dorenbos, J. de Haas, C. van Eijk, Non-proportionality in the scintillation response and the energy resolution obtainable with scintillation crystals, Nuclear Science, IEEE Transactions on 42 (6) (1995) 2190–2202. doi:10.1109/23.489415.
[24] M. Moszynski, M. Gierlik, M. Kapusta, A. Nassalski, T. Szczieśniak, C. Fontaine, P. Lavoute, New photonis XP20D0 photomultiplier for fast timing in nuclear medicine, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 567 (1) (2006) 31–35, proceedings of the 4th International Conference on New Developments in Photodetection BEAUNE 2005 Fourth International Conference on New Developments in Photodetection. doi:http://dx.doi.org/10.1016/j.nima.2006.05.054.
[25] H. Mach, Instructions for the program SORTM, Internal Report. Universidad Complutense, 2012.
[26] Model 935 Quad Constant-Fraction 200-MHz Discriminator Operating and Service Manual.
[27] T. Szczesniak, M. Moszýnski, A. Nassalski, P. Lavoute, A. Dehaine, A further study of timing with LSO on XP20D0 for TOF PET, IEEE Transactions on Nuclear Science 54 (5) (2007) 1464-1473. doi:10.1109/TNS.2007.906406.
[28] H. Mach, F. Wohn, G. Molnár, K. Sistemich, J. C. Hil, M. Moszýnski, R. Gill, W. Krips, D. Brenner, Retardation of B (E2: 0+→ 2^+_1 ) rates in^ 90-96 Sr and strong subshell closure effects in the A ~100 region, Nuclear Physics A 523 (2) (1991) 197 – 227”. doi:http://dx.doi.org/10.1016/0375-9474(91)90001-M.
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