Observation of new neutron-rich isotopes at the NSCL

Abstract

Recently, increased primary beam intensities at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University and advances in experimental techniques allowed probing further into unknown regions of the table of the isotopes with fragmentation and in‐flight fission reactions. Recent measurements at the NSCL have demonstrated that primary beams of 48Ca at 141 MeV/u and 76Ge at 132 MeV/u can be used to produce new isotopes 40Mg, 42,43Al, 44Si, 52Ar, 50Cl, 52,53Ar, 55,56K, 57,58Ca, 59,60,61Sc, 62,63Ti, 65,66V, 68Cr, 70Mn in the proximity of the neutron dripline. Also, experiments with 238U (81 MeV/u) and 208Pb (86 MeV/u) beams in order to measure production yields and possibly observe several neutron rich isotopes in the first time have recently been performed at the NSCL. A search for new neutron‐rich isotopes with 48Ca and 76Ge beams was carried out using the recently developed two‐stage fragment separator technique.