High-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>K</mml:mi></mml:mrow></mml:math>structure in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Fm</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>250</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and the deformed shell gaps at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>152</mml:mn></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo>=</mml:mo><mml:mn>100</mml:mn></mml:mrow></mml:math>
P. T. GreenleesDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandR.-D. HerzbergDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomS. KetelhutDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandP. A. ButlerDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomP. ChowdhuryDepartment of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USAT. GrahnDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandC. Gray-JonesDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomGraeme JonesDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomPeter G. JonesDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandR. JulinDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandS. JuutinenDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandT. L. KhooArgonne National Laboratory, Argonne, Illinois 60439, USAM. LeinoDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandSe Youn MoonDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomM. NymanDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandJ. PakarinenDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomP. RahkilaDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandD. RostronDepartment of Physics, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United KingdomJ. SarénDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandC. ScholeyDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandJ. SorriDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandS. K. TandelDepartment of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USAJ. UusitaloDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandM. VenhartDepartment of Nuclear Physics and Biophysics, Comenius University, 84248 Bratislava, Slovakia
2008lv
ABI
Аннотация
The structure of high-spin and nonyrast states of the transfermium nucleus $^{250}\mathrm{Fm}$ has been studied in detail. The isomeric nature of a two-quasiparticle excitation has been exploited in order to obtain spectroscopic data of exceptional quality. The data allow the configuration of an isomer first discovered over 30 years ago to be deduced, and provide an unambiguous determination of the location of neutron single-particle states in a very heavy nucleus. A comparison to the known two-quasiparticle structure of $^{254,252}\mathrm{No}$ confirms the existence of the deformed shell gaps at $N=152$ and $Z=100$.
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