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Elsevier, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, (758), p. 1-3, 2014

DOI: 10.1016/j.nima.2014.05.016

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Counting rate measurements for lifetime experiments using the RDDS method with the new generation γ-ray array AGATA

Journal article published in 2014 by A. Goasduff ORCID, J. J. Valiente-Dobón, J. J. Valiente-Dobón, S. Lunardi, F. B. Haas ORCID, G. de Angelis, A. Gadea, G. D. Angelis, D. Bazzacco, S. B. Courtin, E. Farnea, A. Gottardo, C. Michelagnoli, D. G. Mengoni, D. R. Napoli and other authors.
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The differential Recoil Distance Doppler Shift (RDDS) method after multinucleon transfer (MNT) reactions to measure lifetimes of excited states in neutron-rich nuclei requires the use of a thick energy degrader for the recoiling ejectiles that are then detected in a spectrometer. This type of measurements greatly benefits from the use of the new generation segmented γ-ray detectors, such as the AGATA demonstrator which offers unprecedented energy and angular resolutions. In order to make an optimized choice of the material and the thickness of the degrader for lifetime measurements using the RDDS method after MNT, an experiment has been performed with the AGATA demonstrator. Counting rate measurements for different degraders are presented. © 2014 Elsevier B.V.