Improvements in the in-beam γ-ray spectroscopy provided by an ancillary detector coupled to a Ge γ-spectrometer: the DIAMANT-EUROGAM II example
| Autor: | D. Curien, A. Brondi, J. N. Scheurer, M. Harston, T.P. Doan, M. M. Aléonard, J.F. Chemin, D. Boivin, R. Moro, F. Bourgine, D. Cabaussel, M. Aiche, Emanuele Vardaci, G. La Rana, J.P. Goudour, G. Barreau |
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| Přispěvatelé: | J. N., Scheurer, M., Aiche, M. M., Aleonard, G., Barreau, F., Bourgine, D., Boivin, D., Cabaussel, J. F., Chemin, T. P., Doan, J. P., Goudour, M., Harston, Brondi, Augusto, LA RANA, Giovanni, Moro, RENATA EMILIA MARIA, Vardaci, Emanuele, D., Curien |
| Rok vydání: | 1997 |
| Předmět: |
Physics
Nuclear and High Energy Physics Spectrometer business.industry Detector scintillation detector Scintillator Doppler shift correction gamma ray spectroscopy Charged particle Nuclear physics symbols.namesake Optics symbols Gamma spectroscopy Spectroscopy business charged particle spectrometer Instrumentation Doppler effect Beam (structure) |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 385:501-510 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/s0168-9002(96)01038-8 |
| Popis: | For the first time the 4π γ-ray spectrometer EUROGAM II has been coupled to a 4π light charged particle detector array, DIAMANT, during a test experiment on the reaction 32 S + 58 Ni at 120 MeV beam energy. A very large improvement in the peak-to-background ratio of the γ-spectra has been found when EUROGAM II is triggered by DIAMANT to select an exit channel. A simple algebra has been developed which provides theoretical estimates in good agreement with these experimental results. It is demonstrated that, depending on both the γ-spectrometer and ancillary detector performances, much better peak-to-background can be obtained by such a coupling. For the same peak-to-background ratio, the use of an ancillary detector allows for a lower γ-ray coincidence level and therefore improves the statistics. Ways to select the most appropriate ancillary detector are given. The ability of the ancillary detector to provide a total Doppler shift correction is crucial for the improvement of the peak-to-background ratio. |
| Databáze: | OpenAIRE |
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