Implementation of the Doppler shift attenuation method using TIP/TIGRESS at TRIUMF: Fusion-evaporation lifetime measurements in 22 Ne

Autor: T. Ballast, G. Hackman, D. Miller, G. C. Ball, P. Voss, U. Rizwan, J. Williams, A. B. Garnsworthy, B. Jigmeddorj, Alejandra Diaz Varela, W. J. Mills, Z. Wang, M. Moukaddam, Corina Andreoiu, D. S. Cross, M. M. Rajabali, T.E. Drake, V. Bildstein, R. Henderson, P. C. Bender, Baharak Hadinia, C. Unsworth, T. Domingo, D. S. Jamieson, R. Kruecken, P. E. Garrett, R. Ashley, Aaron Chester, K. Starosta, A. Knapton, J. Wong, C. Bolton, C. E. Svensson
Rok vydání: 2017
Předmět:
Zdroj: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 859:8-17
ISSN: 0168-9002
Popis: A method is presented for the determination of gamma-ray energies and transition rates in nuclei populated using the fusion-evaporation reaction mechanism and measured using the Doppler-shift attenuation method (DSAM). This method is applied to data collected for the stable benchmark nucleus 22Ne during a commissioning experiment at TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, employing a 12C(18O,2α)22Ne fusion-evaporation reaction. Gamma-ray energies were determined using offline reconstruction to correct for the Doppler shift. Mean lifetimes of the corresponding transitions were then measured via a comparison to Monte-Carlo lineshape simulations developed using the GEANT4 framework. Best fit lifetimes obtained using χ2 analysis were in general agreement with the existing literature, validating the analysis method used.
Databáze: OpenAIRE
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