Testing the vibrational nature of 100Ru

Abstract

There is renewed interest in the exploration of the nature of low-lying collective excitations in nuclei, as several recent studies have posed serious questions regarding the veracity of multiphonon quadrupole vibrations. A recent survey of nuclei with previously assumed low-lying spherical vibrational structure showed that very few passed the criteria. Of the few remaining candidates there is insufficient spectroscopic information to draw conclusions. As part of a larger strategy to address this issue, the structure of 100Ru was studied in this work, making use of the 103Rh(p, α)100Ru reaction. The experiment was performed using the high resolution Q3D magnetic spectrograph in Garching, Germany. The angular distributions of measured cross sections were compared with distorted wave Born approximation (DWBA) calculations. This spectroscopic analysis was used to probe the structure of 100Ru, and indicate that this particular case also does not convincingly demonstrate spherical vibrational behavior