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High-spin spectroscopy of natural and unnatural parity states in the mirror-pair V-45/Ti-45

Bentley, MA (author)
Chandler, C (author)
Bednarczyk, P (author)
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Brandolini, F (author)
Bruce, AM (author)
Curien, D (author)
Dorvaux, O (author)
Ekman, Jörgen (author)
Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Farnea, E (author)
Gelletly, W (author)
Joss, DT (author)
Lenzi, SM (author)
Napoli, DR (author)
Nyberg, J (author)
O'Leary, CD (author)
Williams, SJ (author)
Warner, DD (author)
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 (creator_code:org_t)
2006
2006
English.
In: Physical Review C (Nuclear Physics). - 0556-2813. ; 73:2: 024304
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • High-spin states in the proton-rich nucleus V-45 have been identified for the first time. A comprehensive gamma-ray decay scheme has been established following an experiment performed at the Vivitron accelerator at IReS Strasbourg by using the Euroball gamma-ray detector array coupled to the Neutron Wall and Euclides detector arrays. The natural (negative-) parity scheme is identified up to the f(7/2) band termination in addition to a positive-parity collective structure based on a d(3/2) particle-hole excitation. Comparison of this scheme with that of the mirror partner, Ti-45, has yielded detailed information on the variation of Coulomb energy as a function of excitation energy and angular momentum. This is the first time that such an analysis has been performed for a collective structure built on a cross-shell excitation. Comparison of the observed Coulomb energies with those predicted by large-scale shell-model calculations is presented. In this case, unusually, the calculations do not fare as well as for heavier nuclei in the shell. In addition, stark differences between the two nuclei are observed for the decay intensities of the parity-changing E1 decays that de-excite the positive-parity deformed bands.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

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