A new device, the GALILEO plunger, has been developed for lifetime measurement studies using the GALILEO gamma-ray detector array at the Laboratori Nazionali di Legnaro (LNL) in Legnaro, Italy. This plunger device holds two stretched metal foils in the beam path for the use of the recoil distance Doppler-shift technique in order to measure lifetimes of nuclear excited states in the range of 1 ps to 1 ns. The compact design allows one to combine different auxiliary detectors with the plunger device inside the target chamber and takes care of high gamma-ray transparency. The design and control of the device are presented in this paper, together with lifetimes of excited states in Pt-180 measured within the first in-beam commissioning run.
A new dedicated plunger device for the GALILEO γ-ray detector array
Goasduff, A.;Boso, A.;Gozzelino, A.;John, P. R.;Lenzi, S. M.;Mengoni, D.;Recchia, F.;Siciliano, M.;Testov, D.;Valiente-Dobón, J. J.;
2019
Abstract
A new device, the GALILEO plunger, has been developed for lifetime measurement studies using the GALILEO gamma-ray detector array at the Laboratori Nazionali di Legnaro (LNL) in Legnaro, Italy. This plunger device holds two stretched metal foils in the beam path for the use of the recoil distance Doppler-shift technique in order to measure lifetimes of nuclear excited states in the range of 1 ps to 1 ns. The compact design allows one to combine different auxiliary detectors with the plunger device inside the target chamber and takes care of high gamma-ray transparency. The design and control of the device are presented in this paper, together with lifetimes of excited states in Pt-180 measured within the first in-beam commissioning run.
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