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Decay of the High-K Isomeric State to a Rotational Band in 257Rf

Rissanen, J. (author)
Clark, R. M. (author)
Gregorich, K. E. (author)
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Gates, J. M. (author)
Campbell, C. M. (author)
Crawford, H. L. (author)
Cromaz, M. (author)
Esker, N. E. (author)
Fallon, P. (author)
Forsberg, Ulrika (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
Gothe, O. (author)
Lee, I. -Y. (author)
Liu, H. L. (author)
Machiavelli, A. O. (author)
Mudder, P. (author)
Nitsche, H. (author)
Pang, G. (author)
Rice, A. (author)
Rudolph, Dirk (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
Stoyer, M. A. (author)
Wiens, A. (author)
Xu, F. R. (author)
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 (creator_code:org_t)
2013
2013
English.
In: Physical Review C (Nuclear Physics). - 0556-2813. ; 88:4
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The 257Rf isotope has been populated via the 208Pb(50Ti, n) fusion-evaporation reaction and delayed gamma-ray and electron decay spectroscopy has been performed. The existence of a high-K isomeric state in 257Rf has been confirmed. The isomeric state decays into a rotational band based on the 11/2(-)[725] excitation, which was observed up to spin of (23/2(-)). Three multipolarity-E1 gamma transitions depopulating the isomeric state have been observed, which fixes the spin for that state to (21/2(+)). This assignment agrees with theoretical predictions calculated with the microscopic-macroscopic approach, which suggest the isomeric state to be formed by coupling an unpaired 11/2(-)[725] quasineutron to the (1/2(-)[521] circle times 9/2(+)[624])(5)- two-quasiproton state. The same two-quasiproton excitation is possible for the lowest isomer in 256Rf.

Subject headings

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

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