Статья

Nuclear shapes of highly deformed bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Hf</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>171</mml:mn><mml:mo>,</mml:mo><mml:mn>172</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and neighboring Hf isotopes

Y. C. ZhangDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAW. C.Department of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAA. V. AfanasjevDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAG.B. HagemannJ. BegnaudDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAM. P. CarpenterPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USAP. ChowdhuryDepartment of Physics, University of Massachusetts, Lowell, Massachusetts 01854, USAD. M. CullenSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomM. DjongolovDepartment of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USAD. J. HartleyDepartment of Physics, United States Naval Academy, Annapolis, Maryland 21402, USAR. V. F. JanssensPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USAT. L. KhooPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USAF. G. KondevNuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USAT. LauritsenPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USAE. F. MoorePhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USAE. Ngijoi-YogoDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAS. W. ØdegårdDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayL. L. RiedingerDepartment of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USAS. V. RigbySchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomD. G. RouxDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAD. T. ScholesSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomRahul YadavDepartment of Physics, Mississippi State University, Mississippi State, Mississippi 39762, USAJing‐ye ZhangDepartment of Physics & Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USAS. ZhuPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

2007lv

ABI

Аннотация

A Gammasphere experiment was carried out to search for triaxial strongly deformed (TSD) structures in $^{171,172}\mathrm{Hf}$ and the wobbling mode, a unique signature of nuclei with stable triaxiality. Three strongly deformed bands in $^{172}\mathrm{Hf}$ and one in $^{171}\mathrm{Hf}$ were identified through $^{48}\mathrm{Ca}$($^{128}\mathrm{Te}$, xn) reactions. Linking transitions were established for the band in $^{171}\mathrm{Hf}$ and, consequently, its excitation energies and spins (up to $111/2\ensuremath{\hbar}$) were firmly established. However, none of the $^{172}\mathrm{Hf}$ sequences were linked to known structures. Experimental evidence of triaxiality was not observed in these bands. The new bands are compared with other known strongly deformed bands in neighboring Hf isotopes. Theoretical investigations within various models have been performed. Cranking calculations with the Ultimate Cranker code suggest that the band in $^{171}\mathrm{Hf}$ and two previously proposed TSD candidates in $^{170}\mathrm{Hf}$ and $^{175}\mathrm{Hf}$ are built on proton $({i}_{13/2}{h}_{9/2})$ configurations, associated with near-prolate shapes and deformations enhanced with respect to the normal deformed bands. Cranked relativistic mean-field calculations suggest that band 2 in $^{175}\mathrm{Hf}$ has most likely a near-prolate superdeformed shape involving the $\ensuremath{\pi}{i}_{13/2}\ensuremath{\bigotimes}\ensuremath{\nu}{j}_{15/2}$ high-$j$ intruder orbitals. It is quite likely that the bands in $^{172}\mathrm{Hf}$ are similar in character to this band.

Перевод пока недоступен

Идентификаторы

DOI: 10.1103/physrevc.76.064321

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar