Isotopically resolved neutron total cross sections at intermediate energies

The neutron total cross sections sigma(tot) of O-16,O-18, Ni-58,Ni-64, Rh-103, and Sn-112,Sn-124 have been measured at the Los Alamos Neutron Science Center from low to intermediate energies (3 <= E-lab 450 MeV) by leveraging wave-form-digitizer technology. The sigma tot relative differences between isotopes are presented, revealing additional information about the isovector components needed for an accurate optical-model description away from stability. Digitizer-enabled sigma(tot)-measurement techniques are discussed and a series of uncertainty-quantified dispersive optical model (DOM) analyses using these new data is presented, validating the use of the DOM for modeling light systems (O-16,O-18) and systems with open neutron shells (Ni-58,Ni-64 and Sn-112,Sn-124). The valence-nucleon spectroscopic factors extracted for each isotope reaffirm the usefulness of high-energy proton reaction cross sections for characterizing depletion from the mean-field expectation.