Experimental Neutron Capture Rate Constraint Far from Stability.

Autor: Liddick SN; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Spyrou A; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA., Crider BP; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA., Naqvi F; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA., Larsen AC; Department of Physics, University of Oslo, N-0316 Oslo, Norway., Guttormsen M; Department of Physics, University of Oslo, N-0316 Oslo, Norway., Mumpower M; Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.; Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA., Surman R; Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA., Perdikakis G; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA.; Central Michigan University, Mount Pleasant, Michigan 48859, USA., Bleuel DL; Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550-9234, USA., Couture A; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Crespo Campo L; Department of Physics, University of Oslo, N-0316 Oslo, Norway., Dombos AC; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA., Lewis R; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Mosby S; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Nikas S; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA.; Central Michigan University, Mount Pleasant, Michigan 48859, USA., Prokop CJ; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Renstrom T; Department of Physics, University of Oslo, N-0316 Oslo, Norway., Rubio B; IFIC, CSIC-Universidad de Valencia, 46071 Valencia, Spain., Siem S; Department of Physics, University of Oslo, N-0316 Oslo, Norway., Quinn SJ; National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.; Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2016 Jun 17; Vol. 116 (24), pp. 242502. Date of Electronic Publication: 2016 Jun 16.
DOI: 10.1103/PhysRevLett.116.242502
Abstrakt: Nuclear reactions where an exotic nucleus captures a neutron are critical for a wide variety of applications, from energy production and national security, to astrophysical processes, and nucleosynthesis. Neutron capture rates are well constrained near stable isotopes where experimental data are available; however, moving far from the valley of stability, uncertainties grow by orders of magnitude. This is due to the complete lack of experimental constraints, as the direct measurement of a neutron-capture reaction on a short-lived nucleus is extremely challenging. Here, we report on the first experimental extraction of a neutron capture reaction rate on ^{69}Ni, a nucleus that is five neutrons away from the last stable isotope of Ni. The implications of this measurement on nucleosynthesis around mass 70 are discussed, and the impact of similar future measurements on the understanding of the origin of the heavy elements in the cosmos is presented.
Databáze: MEDLINE