gamma-ray spectroscopic study of calcium-48,49 and scandium-50 focusing on low lying octupole vibration excitations

An inverse kinematic proton scattering experiment was performed at the National Superconducting Cyclotron Laboratory (NSCL) using the GRETINA-S800 detector system in conjunction with the Ursinus College liquid hydrogen target. ;-_1) = 1.0(2)fm,delta_3(Ca-49, 9/2.;+_1) = 1.2(1)fm, delta_3 (Ca-49, 9/2.;+_1) = 1.5(2)fm, delta_3(Ca-49,5/2.;+_1) = 1.1(1)fm. Proton and neutron deformation lengths for two of theseoctupole states were also determined to be delta_p(Ca-48, 3.;-_1) = 0.9(1)fm,delta_p (Ca-49, 9/2.;+_1) = 1.0(1)fm, delta_n(Ca-48, 3.;-_1) = 1.1(3)fm, anddelta_n(Ca-49, 9/2.;+_1) = 1.3(3)fm. Additionally, the ratios of the neutronto proton transition matrix elements were also determined for these two states to be M_n/M_p(Ca-48, 3.;-_1) = 1.7(6) and M_n/M_p(Ca-49, 9/2.;+_1) = 2.0(5).Statistically, the derived values for these two nuclei are nearly identical.