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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

W Schwerdtfeger, PG Thirolf, K Wimmer, D Habs, H Mach, TR Rodriguez, V Bildstein, JL Egido, LM Fraile, R Gernhauser, et al. (2009) PHYSICAL REVIEW LETTERS. 103(1).
abstract
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.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
NUCLEI, REGION, MG-30, MG-32, ELECTRIC MONOPOLE TRANSITIONS, COLLECTIVITY
journal title
PHYSICAL REVIEW LETTERS
Phys. Rev. Lett.
volume
103
issue
1
article number
012501
pages
5 pages
Web of Science type
Article
Web of Science id
000267697900016
JCR category
PHYSICS, MULTIDISCIPLINARY
JCR impact factor
7.328 (2009)
JCR rank
6/71 (2009)
JCR quartile
1 (2009)
ISSN
0031-9007
DOI
10.1103/PhysRevLett.103.012501
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1111739
handle
http://hdl.handle.net/1854/LU-1111739
date created
2011-01-28 15:04:52
date last changed
2016-12-21 15:42:39
@article{1111739,
  abstract     = {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)(+)-{\textrangle} 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 {\textacutedbl}island of inversion.},
  articleno    = {012501},
  author       = {Schwerdtfeger, W and Thirolf, PG and Wimmer, K and Habs, D and Mach, H and Rodriguez, TR and Bildstein, V and Egido, JL and Fraile, LM and Gernhauser, R and Hertenberger, R and Heyde, Kristiaan and Hoff, P and Hubel, H and Koster, U and Kroll, T and Krucken, R and Lutter, R and Morgan, T and Ring, P},
  issn         = {0031-9007},
  journal      = {PHYSICAL REVIEW LETTERS},
  keyword      = {NUCLEI,REGION,MG-30,MG-32,ELECTRIC MONOPOLE TRANSITIONS,COLLECTIVITY},
  language     = {eng},
  number       = {1},
  pages        = {5},
  title        = {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},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.103.012501},
  volume       = {103},
  year         = {2009},
}

Chicago
Schwerdtfeger, W, PG Thirolf, K Wimmer, D Habs, H Mach, TR Rodriguez, V Bildstein, et al. 2009. “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.” Physical Review Letters 103 (1).
APA
Schwerdtfeger, W., Thirolf, P., Wimmer, K., Habs, D., Mach, H., Rodriguez, T., Bildstein, V., et al. (2009). 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. PHYSICAL REVIEW LETTERS, 103(1).
Vancouver
1.
Schwerdtfeger W, Thirolf P, Wimmer K, Habs D, Mach H, Rodriguez T, et al. 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. PHYSICAL REVIEW LETTERS. 2009;103(1).
MLA
Schwerdtfeger, W, PG Thirolf, K Wimmer, et al. “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.” PHYSICAL REVIEW LETTERS 103.1 (2009): n. pag. Print.