Abstract
Lifetime measurements allow extraction of fundamental information on the nature of the excited states of a nuclear system. Since nuclear lifetimes cover many orders of magnitude, a number of experimental techniques and detection setups have been developed depending on the range of the lifetime of interest. The Gamma-ray Induced Doppler Shift Attenuation (GRIDSA) Method presented here is applied to the measurement of very short lifetimes, in the femtosecond range. It allows determining the nuclear lifetime by measuring the Doppler shift of a gamma ray emitted from the state of interest, in different directions with respect to a coincident preceding gamma ray, populating the same state and inducing a recoil of the nucleus in the target material with velocities of the order of 104-105 m/s. We realized an experiment in order to test the GRIDSA technique for the measurement of fs lifetimes after (n,γ) reactions. The measurement was performed at the Institut Laue-Langevin (ILL) with the 8 Ge-clover detectors of the FIPPS array. Preliminary results are discussed.
Highlights
It is well known that lifetime measurements allow us to extract fundamental information on the nature of the excited states of a nuclear system [1]
The Gamma-ray Induced Doppler Shift Attenuation (GRIDSA) Method presented here is applied to the measurement of very short lifetimes, in the femtosecond range
Since many years the attenuation of Doppler shift and broadening has been used in gamma spectroscopy to study very short lifetimes of nuclear states
Summary
- Electromagnetic Transitions in 130Ce P J Nolan, R Aryaeinejad, D J G Love et al. - A comparison of two independent measurements of the lifetime of a state in 59Cu B E Cooke, J R Leslie, W McLatchie et al. - Electromagnetic Transitions in 130Ce P J Nolan, R Aryaeinejad, D J G Love et al. - A comparison of two independent measurements of the lifetime of a state in 59Cu B E Cooke, J R Leslie, W McLatchie et al. This content was downloaded from IP address 159.149.193.177 on 14/03/2019 at 17:52
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
