Proton scattering from the unstable neutron-rich nucleus Ar-43 - art. no. 064623

The neutron-rich argon isotope Ar-43 has been studied by quasielastic and i nelastic proton scattering performed in inverse kinematics. The measured in elastic angular distribution for the second excited state is in good agreem ent with an L=2 transition. Assuming this transition to be E2, yields a bet a(2) value for this state of 0.25+/-0.03 when compared with distorted-wave Born approximation calculations. This value is comparable to the one report ed for the stable isotope Ar-40. Moreover it is similar to those measured b y Coulomb excitation for the neighboring even-even isotopes Ar-42 and Ar-44 indicating that the structure of the argon isotopes is stable as a functio n of neutron number. [S0556-2813(99)03012-5].