It can contribute to the good use of radioactive secondary ion beams produced by GIRAFFE,the secondary beam facility at HI-13 tandem accelerator,and indirectly extract the proton capture cross section which has not been available to date or reduce its uncertainty(compared with the preexisting results).
The characteristics of scintillation fiber BCF-12 and the beam diagnosis unitsusing BCF-12 fibers and PMT for reading out was introduced. Emphasis was laid ondescribing its structure, character and applications in the radioactive ion beam linein Lanzhou (RIBLL).
The secondary beam was formed upon efflux of molecules from the pressure shock through an orifice into a high-vacuum chamber compartment.
The characteristics of the secondary beam were studied.
Vibrational excitation of molecules in the shock wave and subsequent vibrational-translational relaxation, which occurs when a gas is expanded in a vacuum, allow the kinetic energy of molecules in the secondary beam to be substantially increased.
The pressure shock is used as a source of a secondary beam for generating low-energy molecules.
The method is based on the formation of a cold pressure shock (shock wave) in an intense pulsed molecular beam interacting with a solid surface, which serves as a source of the secondary beam of low-energy molecules.
Radioactive ion beam line in Lanzhou (RIBLL) has been constructed for the production of short-lived radioactive nuclei and studies of exotic nuclei far from the β-stability line.
The upgraded radioactive ion beam line of Lanzhou and the project of the cooler storage ring of Lanzhou are presented in this paper.
Secondary beam is a new and efficient experimental technology which is developed to study nuclear physics in recent years. This technology and its application are reviewed. The idea for developing the secondary beam technology on HIRFL accelerator is described, and the result of first-order beam optics is also given.