Search

Your search keyword '"Farnea, Enrico"' showing total 4 results
Start Over Author "Farnea, Enrico" Publication Type Electronic Resources
4 results on '"Farnea, Enrico"'

1. Spectroscopic studies of isospin mixing in 64Ge

Author

Farnea, Enrico

Subjects
539.7, GERMANIUM 64, ISOSPIN, SPIN EXCHANGE, MIXING, SPECTROSCOPY
Abstract

The high-spin states of the nucleus 64Ge have been investigated using the GASP and the EUROBALL arrays of high-purity germanium detectors. In order to achieve the required experimental sensitivity, special selecting devices were used, namely a highly efficient array of liquid scintillators to detect neutrons and the ISIS Si-ball to detect light charged particles, which has been developed in the present work. A detailed decay scheme for 64Ge has been deduced, assigning spins and parities to the levels through a Directional Correlation from Oriented states analysis, an Angular Distribution analysis and a Polarization Correlation from Oriented states analysis. The character of an intense 1665 keV transition, previously reported as a stretched electric dipole with a small multipole mixing ratio, has been established as an electric dipole with a large multipole mixing ratio. The electric dipole strength has been measured using EUROBALL coupled to an early implementation of the EUCLIDES Si-ball and with the Koln plunger device, allowing an experimental estimate of the isospin mixing probability in 64Ge.

Published
2001

2. Interaction position resolution simulations and in-beam measurements of the AGATA HPGe detectors

Author

Söderström, Pär-Anders, Recchia, Francesco, Nyberg, Johan, Al-Adili, Ali, Ataç, Ayşe, Aydin, S., Bazzacco, Dino, Bednarczyk, P., Birkenbach, B., Bortolato, D., Boston, A. J., Boston, H. C., Bruyneel, B., Bucurescu, D., Calore, E., Colosimo, S., Crespi, F. C. L., Dosme, N., Eberth, J., Farnea, Enrico, Filmer, Fay, Gadea, Andres, Gottardo, Andrea, Grave, Xavier, Grebosz, J., Griffiths, R., Gulmini, M., Habermann, T., Hess, H., Jaworski, Grzegorz, Jones, P., Joshi, P., Judson, D. S., Kempley, Ryan, Khaplanov, Anton, Legay, Eric, Lersch, D., Ljungvall, Joa, Lopez-Martens, A., Meczynski, W., Mengoni, D., Michelagnoli, C., Molini, P., Napoli, D. R., Orlandi, R., Pascovici, G., Pullia, A., Reiter, Peter, Sahin, Eda, Smith, J. F., Strachan, J., Tonev, D., Unsworth, Carl, Ur, C. A., Valiente-Dobón, Jose Javier, Veyssiere, C., Wiens, A., Söderström, Pär-Anders, Recchia, Francesco, Nyberg, Johan, Al-Adili, Ali, Ataç, Ayşe, Aydin, S., Bazzacco, Dino, Bednarczyk, P., Birkenbach, B., Bortolato, D., Boston, A. J., Boston, H. C., Bruyneel, B., Bucurescu, D., Calore, E., Colosimo, S., Crespi, F. C. L., Dosme, N., Eberth, J., Farnea, Enrico, Filmer, Fay, Gadea, Andres, Gottardo, Andrea, Grave, Xavier, Grebosz, J., Griffiths, R., Gulmini, M., Habermann, T., Hess, H., Jaworski, Grzegorz, Jones, P., Joshi, P., Judson, D. S., Kempley, Ryan, Khaplanov, Anton, Legay, Eric, Lersch, D., Ljungvall, Joa, Lopez-Martens, A., Meczynski, W., Mengoni, D., Michelagnoli, C., Molini, P., Napoli, D. R., Orlandi, R., Pascovici, G., Pullia, A., Reiter, Peter, Sahin, Eda, Smith, J. F., Strachan, J., Tonev, D., Unsworth, Carl, Ur, C. A., Valiente-Dobón, Jose Javier, Veyssiere, C., and Wiens, A.

Abstract

The interaction position resolution of the segmented HPGe detectors of an AGATA triple cluster detector has been studied through Monte Carlo simulations and in an in-beam experiment. A new method based on measuring the energy resolution of Doppler-corrected γ-ray spectra at two different target to detector distances is described. This gives the two-dimensional position resolution in the plane perpendicular to the direction of the emitted γ-ray. The γ-ray tracking was used to determine the full energy of the γ-rays and the first interaction point, which is needed for the Doppler correction. Five different heavy-ion induced fusion-evaporation reactions and a reference reaction were selected for the simulations. The results of the simulations show that the method works very well and gives a systematic deviation of in the FWHM of the interaction position resolution for the γ-ray energy range from 60 keV to 5 MeV. The method was tested with real data from an in-beam measurement using a 30Si beam at 64 MeV on a thin 12C target. Pulse-shape analysis of the digitized detector waveforms and γ-ray tracking was performed to determine the position of the first interaction point, which was used for the Doppler corrections. Results of the dependency of the interaction position resolution on the γ-ray energy and on the energy, axial location and type of the first interaction point, are presented. The FWHM of the interaction position resolution varies roughly linearly as a function of γ-ray energy from 8.5 mm at 250 keV to 4 mm at 1.5 MeV, and has an approximately constant value of about 4 mm in the γ-ray energy range from 1.5 to 4 MeV.

Published
2011
Full Text
View/download PDF

3. AGATA: Gamma-ray tracking in segmented HPGedetectors

Author

Söderström, Pär-Anders, Al-Adili, Ali, Nyberg, Johan, Recchia, Francesco, Farnea, Enrico, Gadea, Andres, Söderström, Pär-Anders, Al-Adili, Ali, Nyberg, Johan, Recchia, Francesco, Farnea, Enrico, and Gadea, Andres

Published
2009

4. First in-Beam Commissioning Experiment of AGATA

Author

Gadea, Andres, Nyberg, Johan, Recchia, Francesco, Söderström, Pär-Anders, Ataç, Ayşe, Aydin, S, Bazzacco, Dino, Bednarczyk, P, Bortolato, D, Boston, A. J., Boston, H. C., Bruyneel, B, Bucurescu, D, Calore, E, Colosimo, S, Crespi, F. C. L., Dosme, N, Farnea, Enrico, Filmer, Fay, Gottardo, Andrea, Gulmini, M, Jaworski, Grzegorz, Joshi, P, Judson, D. S., Kempley, Ryan, Khaplanov, Anton, Mengoni, D, Michelagnoli, C, Molini, P, Napoli, D. R., Sahin, Eda, Smith, J. F., Tonev, D, Unsworth, Carl, Ur, C. A., Wiens, A, Gadea, Andres, Nyberg, Johan, Recchia, Francesco, Söderström, Pär-Anders, Ataç, Ayşe, Aydin, S, Bazzacco, Dino, Bednarczyk, P, Bortolato, D, Boston, A. J., Boston, H. C., Bruyneel, B, Bucurescu, D, Calore, E, Colosimo, S, Crespi, F. C. L., Dosme, N, Farnea, Enrico, Filmer, Fay, Gottardo, Andrea, Gulmini, M, Jaworski, Grzegorz, Joshi, P, Judson, D. S., Kempley, Ryan, Khaplanov, Anton, Mengoni, D, Michelagnoli, C, Molini, P, Napoli, D. R., Sahin, Eda, Smith, J. F., Tonev, D, Unsworth, Carl, Ur, C. A., and Wiens, A

Published
2009

Catalog

Books, media, physical & digital resources
See catalog results