Speaker
Description
Recent works using direct reactions and the solenoidal-spectrometer technique have revealed insights into the single-particle structure of weakly bound nuclei. Using CERN’s HIE-ISOLDE facility and the ISOLDE Solenoidal Spectrometer, the single-neutron strengths and energies of the $1f_{7/2}$, $2p_{3/2}$, $2p_{1/2}$, $0h_{9/2}$, $1f_{5/2}$, and $0i_{13/2}$ valence neutron orbitals outside of doubly magic $^{132}$Sn have been determined via the $^{132}$Sn($d$,$p$)$^{133}$Sn reaction at 7.65 MeV per nucleon. The results suggest that the single-neutron strength for each orbital is carried in a single excitation, affirming the notion that 132Sn, the heaviest short-lived doubly magic nucleus, exhibits one of the strongest shell closures of all nuclei. These data and other data for weakly bound $N\approx20$ and 28 nuclei have revealed a decrease in the separation of spin-orbit partners in line with the predictions of the late Professor Hamamoto's work. I attempt to show this reduction in a systematic way using experimental data.
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract Number DE-AC02-06CH11357.
| Type of contribution | poster |
|---|---|
| Are you a student or postdoc? | no |
