Production yields of rare isotopes from projectile fragmentation of Calcium-40 and Calcium-48

Projectile fragmentation is used extensively to produce rare isotopes at the NSCL. Nuclei impinging on a target, typically beryllium, fragment upon collision and more exotic species with extreme ratios of protons and neutrons are produced in this process. Understanding the mechanisms behind the production of rare isotopes using neutron-rich beams is important for the operation of the NSCL and future facilities like the Rare Isotope Accelerator RIA.

A set of recent experiments at the NSCL has demonstrated that a change of eight neutrons in the primary beam (Ca-48 versus Ca-40) leads to the production of almost twice as many isotopes, most of which are neutron-rich.

This work was supported by the National Science Foundation through grants PHY 0110253.

Figure 1: Isotopes produced from the projectile fragmentation of Ca-40 (top) and Ca-48 (bottom) at E/A~130 MeV. more

M. Betty Tsang
tsang at, 517-333-6386.