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Title: Intruder dominance in the $${0_2^+}$$ state of 32Mg studied with a novel technique for in-flight decays

Abstract

The development of advanced $γ$-ray tracking arrays allows for a sensitive new technique to investigate elusive states of exotic nuclei with fast rare-isotope beams. By taking advantage of the excellent energy and position resolution of the Gamma-Ray Energy Tracking In-beam Nuclear Array in this study, we developed a novel technique to identify in-flight isomeric decays of the 0$$^+_2$$ state in 32Mg populated in a two-proton removal reaction. We confirm the 0$$^+_2$$ → 2$$^+_1$$ $γ$-ray transition of 32Mg and constrain the 0$$^+_2$$ decay lifetime, suggesting a large collectivity. The small partial cross section populating the 0$$^+_2$$ state in this reaction provides experimental evidence for the reduced occupancy of the normal configuration of the 0$$^+_2$$ state, indicating the intruder dominance of this state.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [4];  [1]; ORCiD logo [1];  [1];  [5];  [1];  [4];  [6];  [7]; ORCiD logo [7];  [1];  [8] more »;  [7] « less
  1. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab. and Dept. of Physics and Astronomy
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics
  3. Univ. zu Köln, Köln (Germany). Inst. für Kernphysik
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
  5. Osaka Univ., Ibaraki, Osaka (Japan). Research Center for Nuclear Physics
  6. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Ruđer Boškovic Inst., Zagreb (Croatia)
  7. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  8. Univ. of Surrey, Guildford, Surrey (United Kingdom). Dept. of Physics
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1570217
Grant/Contract Number:  
NA0003180
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 100; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Elder, R., Iwasaki, H., Ash, J., Bazin, D., Bender, P. C., Braunroth, T., Brown, B. A., Campbell, C. M., Crawford, H. L., Elman, B., Gade, A., Grinder, M., Kobayashi, N., Longfellow, B., Macchiavelli, A. O., Mijatović, T., Pereira, J., Revel, A., Rhodes, D., Tostevin, J. A., and Weisshaar, D. Intruder dominance in the ${0_2^+}$ state of 32Mg studied with a novel technique for in-flight decays. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.100.041301.
Elder, R., Iwasaki, H., Ash, J., Bazin, D., Bender, P. C., Braunroth, T., Brown, B. A., Campbell, C. M., Crawford, H. L., Elman, B., Gade, A., Grinder, M., Kobayashi, N., Longfellow, B., Macchiavelli, A. O., Mijatović, T., Pereira, J., Revel, A., Rhodes, D., Tostevin, J. A., & Weisshaar, D. Intruder dominance in the ${0_2^+}$ state of 32Mg studied with a novel technique for in-flight decays. United States. doi:10.1103/PhysRevC.100.041301.
Elder, R., Iwasaki, H., Ash, J., Bazin, D., Bender, P. C., Braunroth, T., Brown, B. A., Campbell, C. M., Crawford, H. L., Elman, B., Gade, A., Grinder, M., Kobayashi, N., Longfellow, B., Macchiavelli, A. O., Mijatović, T., Pereira, J., Revel, A., Rhodes, D., Tostevin, J. A., and Weisshaar, D. Fri . "Intruder dominance in the ${0_2^+}$ state of 32Mg studied with a novel technique for in-flight decays". United States. doi:10.1103/PhysRevC.100.041301.
@article{osti_1570217,
title = {Intruder dominance in the ${0_2^+}$ state of 32Mg studied with a novel technique for in-flight decays},
author = {Elder, R. and Iwasaki, H. and Ash, J. and Bazin, D. and Bender, P. C. and Braunroth, T. and Brown, B. A. and Campbell, C. M. and Crawford, H. L. and Elman, B. and Gade, A. and Grinder, M. and Kobayashi, N. and Longfellow, B. and Macchiavelli, A. O. and Mijatović, T. and Pereira, J. and Revel, A. and Rhodes, D. and Tostevin, J. A. and Weisshaar, D.},
abstractNote = {The development of advanced $γ$-ray tracking arrays allows for a sensitive new technique to investigate elusive states of exotic nuclei with fast rare-isotope beams. By taking advantage of the excellent energy and position resolution of the Gamma-Ray Energy Tracking In-beam Nuclear Array in this study, we developed a novel technique to identify in-flight isomeric decays of the 0$^+_2$ state in 32Mg populated in a two-proton removal reaction. We confirm the 0$^+_2$ → 2$^+_1$ $γ$-ray transition of 32Mg and constrain the 0$^+_2$ decay lifetime, suggesting a large collectivity. The small partial cross section populating the 0$^+_2$ state in this reaction provides experimental evidence for the reduced occupancy of the normal configuration of the 0$^+_2$ state, indicating the intruder dominance of this state.},
doi = {10.1103/PhysRevC.100.041301},
journal = {Physical Review C},
number = 4,
volume = 100,
place = {United States},
year = {2019},
month = {10}
}

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