The level states of the nucleus ^(124)Cs have been populated through the ^(116)Sn(^(11) B,3n)reaction at a beam energy of 45MeV,provided by the HI-13 tandem accelerator of the China Institute of Atomic Energy.A number...The level states of the nucleus ^(124)Cs have been populated through the ^(116)Sn(^(11) B,3n)reaction at a beam energy of 45MeV,provided by the HI-13 tandem accelerator of the China Institute of Atomic Energy.A number of low-lying states are constructed.The level states in theπh_(11/2)νg_(7/2) side band are extended down to lower spin by one h.The level energies and spins in the rotational bands are determined through the establishment of various connections,which confirm the spin assignment of the yrast band in ^(124)Cs based on excitation energy systematics.It is revealed that with the present spin assignment,theπh_(11/2)νg_(7/2) side band shows signature inversion at low-spin region and the inversion occurs at a spin of about 16h.展开更多
The high-spin states of 160Lu are populated by the fusion-evaporation reaction 144Sm(19F,3n)160 Lu at beam energies of 90 and 106 Me V.A new level scheme of 160Lu is established.A possible isomeric state based on the ...The high-spin states of 160Lu are populated by the fusion-evaporation reaction 144Sm(19F,3n)160 Lu at beam energies of 90 and 106 Me V.A new level scheme of 160Lu is established.A possible isomeric state based on the πh11/2 (0) υh9/2 configuration is observed.The new decoupled band with the configuration of πd3/2[411]1/2^(+) (0)υi13/2[660] 1/2^(+) is established,and the configurations of these similar decoupled bands in the neighboring odd-odd 162-166 Lu nuclei are suggested.A positive parity coupled band is assigned as the πd5/2[402]5/2^(+)(0)υi13/2[660]1 /2^(+)configuration.展开更多
The high-spin states of the odd-odd nucleus 170Ta have been studied by the 150Gd(19F,4n)170Ta reaction at the beam energy of 97 MeV.The α=1 sequence of the semi-decoupled band has been pushed to higher-spin states an...The high-spin states of the odd-odd nucleus 170Ta have been studied by the 150Gd(19F,4n)170Ta reaction at the beam energy of 97 MeV.The α=1 sequence of the semi-decoupled band has been pushed to higher-spin states and the signature inversion point was observed at 19.5ħ.The results are compared with those of the neighboring odd-odd nuclei.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19775019.
文摘The level states of the nucleus ^(124)Cs have been populated through the ^(116)Sn(^(11) B,3n)reaction at a beam energy of 45MeV,provided by the HI-13 tandem accelerator of the China Institute of Atomic Energy.A number of low-lying states are constructed.The level states in theπh_(11/2)νg_(7/2) side band are extended down to lower spin by one h.The level energies and spins in the rotational bands are determined through the establishment of various connections,which confirm the spin assignment of the yrast band in ^(124)Cs based on excitation energy systematics.It is revealed that with the present spin assignment,theπh_(11/2)νg_(7/2) side band shows signature inversion at low-spin region and the inversion occurs at a spin of about 16h.
基金Partially supported by the National Natural Science Foundation of China under Grant Nos 11075064 and 21101129the National Basic Research Program of China under Grant No 2007CB815005the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant No 20050183008.
文摘The high-spin states of 160Lu are populated by the fusion-evaporation reaction 144Sm(19F,3n)160 Lu at beam energies of 90 and 106 Me V.A new level scheme of 160Lu is established.A possible isomeric state based on the πh11/2 (0) υh9/2 configuration is observed.The new decoupled band with the configuration of πd3/2[411]1/2^(+) (0)υi13/2[660] 1/2^(+) is established,and the configurations of these similar decoupled bands in the neighboring odd-odd 162-166 Lu nuclei are suggested.A positive parity coupled band is assigned as the πd5/2[402]5/2^(+)(0)υi13/2[660]1 /2^(+)configuration.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19635030 and 19675007.
文摘The high-spin states of the odd-odd nucleus 170Ta have been studied by the 150Gd(19F,4n)170Ta reaction at the beam energy of 97 MeV.The α=1 sequence of the semi-decoupled band has been pushed to higher-spin states and the signature inversion point was observed at 19.5ħ.The results are compared with those of the neighboring odd-odd nuclei.
