Proton Shell Gaps in N=28 Nuclei from the First Complete Spectroscopy Study with FRIB Decay Station Initiator.

Autor: Cox I; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Xu ZY; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Grzywacz R; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Ong WJ; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Rasco BC; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Kitamura N; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Hoskins D; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Neupane S; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Ruland TJ; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.; Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA., Allmond JM; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., King TT; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Lubna RS; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA., Rykaczewski KP; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Schatz H; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Sherrill BM; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Tarasov OB; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA., Ayangeakaa AD; Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.; Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708, USA., Berg HC; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Bleuel DL; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Cerizza G; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA., Christie J; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Chester A; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA., Davis J; Pacific Northwest National Laboratory, Richland, Washington 99354, USA., Dembski C; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Doetsch AA; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Duarte JG; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Estrade A; Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA., Fijałkowska A; Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland., Gray TJ; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Good EC; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA., Haak K; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Hanai S; Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan., Harke JT; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Harris C; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Hermansen K; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Hoff DEM; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Jain R; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Karny M; Faculty of Physics, University of Warsaw, PL 02-093 Warsaw, Poland., Kolos K; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Laminack A; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Liddick SN; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Longfellow B; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Lyons S; Pacific Northwest National Laboratory, Richland, Washington 99354, USA., Madurga M; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Mogannam MJ; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Nowicki A; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Ogunbeku TH; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Owens-Fryar G; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Rajabali MM; Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505, USA., Richard AL; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Ronning EK; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA., Rose GE; University of California, Berkeley, Berkeley, California 94704, USA., Siegl K; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA., Singh M; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA., Spyrou A; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Sweet A; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Tsantiri A; Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.; Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA., Walters WB; Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA., Yokoyama R; Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2024 Apr 12; Vol. 132 (15), pp. 152503.
DOI: 10.1103/PhysRevLett.132.152503
Abstrakt: The first complete measurement of the β-decay strength distribution of _{17}^{45}Cl_{28} was performed at the Facility for Rare Isotope Beams (FRIB) with the FRIB Decay Station Initiator during the second FRIB experiment. The measurement involved the detection of neutrons and γ rays in two focal planes of the FRIB Decay Station Initiator in a single experiment for the first time. This enabled an analytical consistency in extracting the β-decay strength distribution over the large range of excitation energies, including neutron unbound states. We observe a rapid increase in the β-decay strength distribution above the neutron separation energy in _{18}^{45}Ar_{27}. This was interpreted to be caused by the transitioning of neutrons into protons excited across the Z=20 shell gap. The SDPF-MU interaction with reduced shell gap best reproduced the data. The measurement demonstrates a new approach that is sensitive to the proton shell gap in neutron rich nuclei according to SDPF-MU calculations.
Databáze: MEDLINE