Maqola

Prompt and delayed spectroscopy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Tb</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>142</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>using recoil-isomer tagging

Paolo MasonSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomD. M. CullenSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomC. ScholeyDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandS. EeckhaudtDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandT. GrahnDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandP. T. GreenleesDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandU. JakobssonDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandPeter 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, FinlandS. KetelhutDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandA. KishadaSchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomM. LeinoDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandA.-P. LeppänenDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandK. MäntyniemiDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandP. NieminenDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandM. NymanDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandJ. PakarinenDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandP. PeuraDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandP. RahkilaDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandS. V. RigbySchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomJ. SarénDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandJ. SorriDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandJ. UusitaloDepartment of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, FinlandB. J. VarleySchuster Laboratory, University of Manchester, Manchester M13 9PL, United KingdomM. VenhartDepartment of Nuclear Physics and Biophysics, Comenius University, 84248 Bratislava, Slovakia

2009lv

ABI

Annotatsiya

Recoil-isomer tagging has been used to characterize the states built upon an ${I}^{\ensuremath{\pi}}={8}^{+}$ isomer in $^{142}\mathrm{Tb}$. High-spin states of the neutron-deficient nucleus $^{142}\mathrm{Tb}$ were populated using an $^{54}\mathrm{Fe}$ beam, accelerated onto a $^{92}\mathrm{Mo}$ target of thickness $~500 \ensuremath{\mu}\mathrm{g}/{\mathrm{cm}}^{2}$ at energies of 245, 252, and 265 MeV using the K130 cyclotron at the University of Jyv\"askyl\"a, Finland. Use of the JUROGAM target-position Ge-detector array coupled with the GREAT focal-plane spectrometer at the RITU gas-filled recoil separator has significantly increased the efficiency of the isomer-tagging technique. The rotational band built upon the ${I}^{\ensuremath{\pi}}={8}^{+}$ isomeric state was established with isomer-tagged $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ coincidence data and angular distributions were measured for some of the more intensely populated states. Two previously unobserved bands that bypass the isomer were also established. The new data have been interpreted within the framework of the cranked-shell model. The data show good agreement with the calculated triaxial nuclear shape with $\ensuremath{\gamma}=\ensuremath{-}{30}^{\ifmmode^\circ\else\textdegree\fi{}}$ for the $^{142m2}\mathrm{Tb}$ isomeric state. The $B(M1)/B(E2)$ branching ratios, nuclear alignment, signature splitting, and reduced transition probability, $B(E1)$, of the isomeric state have been systematically compared with those of the neighboring nuclei. These comparisons give further evidence for the $\ensuremath{\pi}{h}_{11/2}\ensuremath{\bigotimes}\ensuremath{\nu}{h}_{11/2}$ configuration of the isomer.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1103/physrevc.79.024318

Iqtiboslar va manbalar

2 ta iqtibos0 ta foydalanilgan manba

Koʻrsatkichlar — AkademScholar