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

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.

doi:10.1103/PhysRevC.100.041301

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

Journal Article · Fri Oct 04 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.100.041301· OSTI ID:1570217

^[1]; Iwasaki, H. ^[1]; Ash, J. ^[1]; Bazin, D. ^[1]; Bender, P. C. ^[2]; Braunroth, T. ^[3]; Brown, B. A. ^[1]; Campbell, C. M. ^[4]; Crawford, H. L. ^[4]; Elman, B. ^[1];

^[1]; Grinder, M. ^[1]; Kobayashi, N. ^[5]; Longfellow, B. ^[1]; Macchiavelli, A. O. ^[4]; Mijatović, T. ^[6]; Pereira, J. ^[7];

^[7]; Rhodes, D. ^[1]; Tostevin, J. A. ^[8] more »

Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab. and Dept. of Physics and Astronomy
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics
Univ. zu Köln, Köln (Germany). Inst. für Kernphysik
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
Osaka Univ., Ibaraki, Osaka (Japan). Research Center for Nuclear Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Ruđer Boškovic Inst., Zagreb (Croatia)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
Univ. of Surrey, Guildford, Surrey (United Kingdom). Dept. of Physics

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.

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Research Organization:: Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003180; AC02-05CH11231

OSTI ID:: 1570217

Alternate ID(s):: OSTI ID: 1737579

Journal Information:: Physical Review C, Vol. 100, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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

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