1. Improved background suppression for radiative capture reactions at LUNA with HPGe and BGO detectors
- Author
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F. Ferraro, Zs. Fülöp, P. Corvisiero, Michael Wiescher, A. Formicola, A. Di Leva, Gianluca Imbriani, Oscar Straniero, I. Kochanek, L. Schiavulli, G. Gervino, Marialuisa Aliotta, C. Broggini, R. Perrino, K. Stöckel, A. Guglielmetti, László Csedreki, M. P. Takács, Z. Elekes, A. Best, A. Boeltzig, Frank Strieder, Sandra Zavatarelli, F. Cavanna, Antonio Caciolli, M. Junker, C. Gustavino, György Gyürky, F. R. Pantaleo, Davide Trezzi, D. Piatti, C. G. Bruno, Tamás Szücs, Richard deBoer, D. Bemmerer, V. Paticchio, V. Mossa, G. F. Ciani, Roberto Menegazzo, Raffaele Buompane, Thomas Davinson, T. Chillery, E. M. Fiore, Paolo Prati, R. Depalo, Boeltzig, A., Best, A., Imbriani, G., Junker, M., Aliotta, M., Bemmerer, D., Broggini, C., Bruno, C. G., Buompane, R., Caciolli, A., Cavanna, F., Chillery, T., Ciani, G. F., Corvisiero, P., Csedreki, L., Davinson, T., Deboer, R. J., Depalo, R., Leva, A Di, Elekes, Z., Ferraro, F., Fiore, E. M., Formicola, A., Fülöp, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, G., Kochanek, I., Menegazzo, R., Mossa, V., Pantaleo, F. R., Paticchio, V., Perrino, R., Piatti, D., Prati, P., Schiavulli, L., Stöckel, K., Straniero, O., Strieder, F., Szücs, T., Takács, M. P., Trezzi, D., Wiescher, M., Zavatarelli, S., Leva, A. D., Fulop, Z., Gyurky, G., Stockel, K., Szucs, T., and Takacs, M. P.
- Subjects
Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,shielding ,BGO ,Radiative capture ,Detector ,nuclear astrophysics ,01 natural sciences ,background reduction ,gamma ray spectroscopy ,Semiconductor detector ,Nuclear physics ,HPGe ,summing detector ,gamma ray spectroscopy, nuclear astrophysics, background reduction, shielding, HPGe, BGO, summing detector ,0103 physical sciences ,Electromagnetic shielding ,Background suppression ,Nuclear astrophysics ,Gamma spectroscopy ,010306 general physics ,nuclear astrophysic - Abstract
Direct measurements of small nuclear reaction cross sections require a low background in the signal region of interest to achieve the necessary sensitivity. We describe two complementary detector setups that have been used for studies of $({\rm{p}},\gamma )$ reactions with solid targets at the Laboratory for Underground Nuclear Astrophysics (LUNA): a high-purity germanium detector and a bismuth germanate (BGO) detector. We present the effect of a customised lead shielding on the measured background spectra in the two detector setups at LUNA. We developed a model to describe the contributions of environmental and intrinsic backgrounds in the BGO detector measurements. Furthermore we present an upgrade of the data acquisition system for our BGO detector, which allows us to exploit the features of the segmented detector and overcome some of the limitations encountered in previous experiments. We conclude with a discussion on the improved sensitivity of the presented setups, and the benefits for ongoing and possible future measurements.
- Published
- 2018