Author/Authors :
Goasduff، نويسنده , , A. and Valiente Dobَn، نويسنده , , J.J. and Lunardi، نويسنده , , Jeffrey S. and Haas، نويسنده , , F. and Gadea، نويسنده , , A. and de Angelis، نويسنده , , G. and Bazzacco، نويسنده , , D. and Courtin، نويسنده , , S. and Farnea، نويسنده , , E. and Gottardo، نويسنده , , A. and Michelagnoli، نويسنده , , C. and Mengoni، نويسنده , , D. R. Napoli، نويسنده , , D.R. and Recchia، نويسنده , , F. and Sahin، نويسنده , , E. and Ur، نويسنده , , C.A.، نويسنده ,
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.
