A new approach to measure momentum distributions and production cross-sections of neutron rich nuclei using fragment separators

作者：Tarasov O B^*; Bazin D; Baumann T; Gade A; Ginter T N; Hausmann M; Morrissey D J; Pereira J; Portillo M; Sherrill B M; Stolz A; Thoennessen M

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2010, 620(2-3): 578-584.

DOI：10.1016/j.nima.2010.03.096

• Projectile fragmentation
• Production cross-sections
• Longitudinal momentum distributions
• Fragment separator
• Two-stage separator
• LISE(++) code

The longitudinal momentum distributions of 34 neutron-rich isotopes of elements produced by fragmentation of a (76)Ge beam at 132 MeV/u with 13 <= Z <= 27 were scanned using a novel experimental approach where a variety of targets with different thicknesses was used with the fragment separator at constant magnetic rigidity. In comparison to models that describe the shape and centroid of fragment momentum distributions, a parametrization based on the measured data was derived. Details of the transmission calculations, the analysis of their uncertainties, as well as the general analysis of momentum distributions and deduced cross-sections obtained with this approach are presented.

• 出版日期2010-8-11