Determination of the isomeric fraction in a postaccelerated radioactive ion beam using the coupled decay-chain equations

作者：Ekstrom A^*; Cederkall J; Dijulio D D; Fahlander C; Van de Walle J

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2010, 614(2): 303-307.

DOI：10.1016/j.nima.2009.12.045

• Postaccelerated radioactive ion beam
• Isomeric beam
• Decay-chain analysis
• GEANT4

A method based on the coupled decay-chain equations for extracting the isotopic and the isomeric composition of a postaccelerated radioactive ion beam is presented and demonstrated on a data set from a Coulomb excitation experiment. This is the first attempt of analyzing the content of a postaccelerated radioactive ion beam using this technique. The beam composition is required for an absolute normalization of the measurement. The strength of the method, as compared to present online-based methods, lies in the determination of the isomeric fraction of a partially isomeric beam using all data accumulated during the experiment. We discuss the limitations and sensitivity of the method with respect to the gamma-ray detection efficiency and the accumulated flux.

• 出版日期2010-3-1