Analysis of Neutron-Rich Al Nuclei Decay Scheme at Kyushu University
Explore the reconstruction of the 33Mg-33Al decay scheme and the structure of neutron-rich N20 nuclei at Kyushu University. Discover the experimental setup, energy calibration, detailed analysis, and future outlook of this research project.
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Presentation Transcript
Reconstruction of 33Mg 33Al decay scheme Kyushu University Y. Yamamoto, S1840 COLLABORATION Kyushu University Yosuke Yamamoto
Structure of neutron-rich N20 nuclei Conventional magic number General nuclei around the magic number Island of inversion 20 17 18 19 21 22 23 30Al 31Al 32Al 33Al 34Al 35Al 36Al 29Mg 30Mg31Mg32Mg33Mg34Mg35Mg 28Na 29Na 30Na 31Na 32Na 33Na 34Na Deformation Stable and Spherical 27Ne 28Ne 29Ne 30Ne 31Ne 32Ne Our group studied the neutron-rich Al nuclei located on the northern boundary of this nuclear region. Present work 33Al 26F 27F 29F 31F Prolate Transitional Spherical Island of inversion
Setup RI beam Facility ISAC-I, TRIUMF Primary beam proton 500 MeV Intensity 20 A Target UCx RI beam 33Mg Energy 30 keV Purity 100 % Ge detectors Neutron detectors 33Mg beam Nd magnet Detectors Ge detectors Plastic scintillators Low-energy neutron detectors (< 1 MeV) 6 High-energy neutron detectors (> 1 MeV) 2 8 10
Energy calibration 2. Calculate residuals. 33Mg 33Al > 3000 keV Standard source 56Co, 60Co, 152Eu Energy 121 3548 keV 1.7 keV 1. Fit with a linear function. 3. Use Two fitting functions. 0.14 keV
- analysis Decay scheme -single 33Mg 33Al -rays Coincidence -rays 1618 New level New level New transition New transition Revised transition Revised transition 1618 keV Gate
Poster contents Island of Inversion Experimental Setup Energy Calibration - Analysis and Decay Scheme Construction Future out look
