Projectile fragmentation of radioactive beams of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ni</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>68</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Cu</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>69</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>, and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Zn</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>72</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
S. M. LukyanovFlerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, RU-141980 Dubna, Moscow region, Russian FederationM. MockoDepartment of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USAL.N. AndronenkoNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. N. AndronenkoNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAD. BazinNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. FamianoDepartment of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USAA. GadeNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAS. P. LobastovFlerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, RU-141980 Dubna, Moscow region, Russian FederationW. G. LynchDepartment of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USAA. M. RogersDepartment of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USAO. TarasovFlerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, RU-141980 Dubna, Moscow region, Russian FederationM. B. TsangDepartment of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USAG. VerdeINFN, Sezione di Catania, 64 Via Santa Sofia, I-95123 Catania, ItalyMark S. WallaceLos Alamos National Laboratory, Los Alamos, New Mexico 87545, USAR. G. T. ZegersDepartment of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
2009lv
ABI
Аннотация
The fragment production cross sections of secondary neutron-rich beams of $^{68}\mathrm{Ni}$, $^{69}\mathrm{Cu}$, and $^{72}\mathrm{Zn}$ isotopes at energies of about $95A$ MeV have been measured. We compare the measured cross sections to EPAX, an empirical parametrization of fragmentation cross sections. A reasonable agreement of the experimental data and EPAX predictions suggests that an EPAX parametrization used for stable beams seems to be valid for unstable neutron-rich ion beams. EPAX tends to overestimate the yields of neutron-rich isotopes. This problem is amplified when neutron-rich radioactive beams are employed, leading to overly optimistic estimates of the production of neutron-rich isotopes.
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