Academic Journal
Shape coexistence near neutron number N=20: first identification of the E0 decay from the deformed first excited J(pi)=0(+) state in Mg-30
| العنوان: | Shape coexistence near neutron number N=20: first identification of the E0 decay from the deformed first excited J(pi)=0(+) state in Mg-30 |
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| المؤلفون: | Schwerdtfeger, W, Thirolf, PG, Wimmer, K, Habs, D, Mach, H, Rodriguez, TR, Bildstein, V, Egido, JL, Fraile, LM, Gernhauser, R, Hertenberger, R, Heyde, Kristiaan, Hoff, P, Hubel, H, Koster, U, Kroll, T, Krucken, R, Lutter, R, Morgan, T, Ring, P |
| المصدر: | PHYSICAL REVIEW LETTERS ; ISSN: 0031-9007 |
| سنة النشر: | 2009 |
| المجموعة: | Ghent University Academic Bibliography |
| مصطلحات موضوعية: | Physics and Astronomy, NUCLEI, REGION, MG-30, MG-32, ELECTRIC MONOPOLE TRANSITIONS, COLLECTIVITY |
| الوصف: | The 1789 keV state in Mg-30 was identified as the first excited 0(+) state via its electric monopole (E0) transition to the ground state. The measured small value of rho(2)(E0,0(2)(+)-> 0(1)(+))=(26.2 +/- 7.5)x10(-3) implies within a two-level model a small mixing of competing configurations with largely different intrinsic quadrupole deformation near the neutron shell closure at N=20. Axially symmetric configuration mixing calculations identify the ground state of Mg-30 to be based on neutron configurations below the N=20 shell closure, while the excited 0(+) state mainly consists of two neutrons excited into the nu 1f(7/2) orbital. The experimental result represents the first case where an E0 back decay from a strongly deformed second to the normal deformed first nuclear potential minimum well has been unambiguously identified, thus directly proving shape coexistence at the borderline of the much-debated "island of inversion. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://biblio.ugent.be/publication/1111739; http://hdl.handle.net/1854/LU-1111739; http://dx.doi.org/10.1103/PhysRevLett.103.012501; https://biblio.ugent.be/publication/1111739/file/1112017 |
| DOI: | 10.1103/PhysRevLett.103.012501 |
| الاتاحة: | https://biblio.ugent.be/publication/1111739 http://hdl.handle.net/1854/LU-1111739 https://doi.org/10.1103/PhysRevLett.103.012501 https://biblio.ugent.be/publication/1111739/file/1112017 |
| Rights: | No license (in copyright) ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.EF2F3B06 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevLett.103.012501 |
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