On the design and installation of a Compton–suppressed HPGe spectrometer at the Budapest neutron-induced prompt gamma spectroscopy (NIPS) facility
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An important aspect of the ongoing upgrade at the Budapest PGAA-NIPS facility has been the design and installation of a second Compton-suppressed gamma spectrometer. The aim was to provide excellent spectroscopic conditions for future position sensitive and large sample prompt gamma activation analysis applications. The optimum geometry of the setup was determined by Monte Carlo calculations with the MCNP-CP code. The suppression factors for various layouts (co-axial, perpendicular), shapes (cylindrical, tapered), and thicknesses were compared at different gamma-ray energies. The optimum configuration, as a trade-off between performance and cost, was selected, purchased, and installed. Several characteristic features of a collimated, Compton-suppressed system could be revealed, which allowed us to achieve a better and cost-effective performance. The calculations were validated with a 14N(n,γ)15N calibration source.
KeywordsPrompt gamma activation analysis (PGAA) Neutron induced prompt gamma spectrometry (NIPS) Compton suppression HPGe gamma-ray detector Anti-coincidence Monte Carlo simulation MCNP–CP
The authors acknowledge the financial support of the NAP VENEUS 08 project (Contract No. OMFB-00184/2006) and the technical help of Kálmán Takács. Certain commercial equipment, instruments, software or materials are identified in this paper in order to specify the experimental procedures in adequate detail. This identification does not imply that the equipment or materials identified are necessarily the best available for the purpose.
- 1.Molnár GL (ed) (2004) Handbook of prompt gamma activation analysis with neutron beams. Kluwer Academic Publishers, Dordrecht/Boston/New YorkGoogle Scholar
- 8.Park CS, Sun GM, Choi HD (2003) J Korean Nucl Soc 35:234Google Scholar
- 9.Berlizov AN (2006) MCNP-CP, a correlated particle radiation source extension of a general purpose Monte Carlo N particle transport code. In: Semkov TM, Pommé S, Jerome SM (eds) ACS symposium series 945. American Chemical Society, Washington DC, pp 183–194. doi: 10.1021/bk-2007-0945.ch013 Google Scholar
- 10.J.F.Briesmeister et al. (1997) MCNP—a general Monte Carlo N-particle transport code. Los Alamos National Laboratory Report LA-12625-MGoogle Scholar
- 15.T. Belgya, Zs Révay, B Fazekas, I Héjja, L Dabolczi, GL Molnár (1997) The new Budapest capture gamma-ray facility. In: GL Molnár, T Belgya, Zs Révay (eds.) Proceedings of 9th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Budapest, Hungary, 8–12 October, Springer Verlag, Budapest, Berlin, Heidelberg, 826–837, ISBN-963-7775-55Google Scholar
- 19.Scionix Holland BV Dedicated Scintillation Detectors P.O. Box 143 3980 CC Bunnik, The NetherlandsGoogle Scholar
- 20.Belgya T (2006) Physical Review C. 74: 024603-1-8Google Scholar
- 21.Gencho YR (2006) Dipole-strength distributions below the giant dipole resonance in 92Mo, 98Mo and 100Mo, Ph.D. dissertation, Institut für Kern und Teilchenphysik Fakultät Matematik und Naturwissenschaften, Technische Universität Dresden, Dresden, Fig. 4.2, p 39Google Scholar