High-spin states in the odd-proton nucleus^(135)pm have been investigated using the^(107)Ag(^(32)S,2p2n)^(135)pm reaction.Seven rotational bands have been observed in^(135)pm.The yrast band based on a decoupled h_(11/...High-spin states in the odd-proton nucleus^(135)pm have been investigated using the^(107)Ag(^(32)S,2p2n)^(135)pm reaction.Seven rotational bands have been observed in^(135)pm.The yrast band based on a decoupled h_(11/2)proton is found to have a band crossing in ω_(c)~0.43 MeV/h.Two positive-parity bands based on the two signature components of the πg_(7/2)5/2^(+)[413]Nilsson orbital have been observed in the main sidebands.The favoured band with(π,α)=(+,1/2)has been shown to populate below the first pair of proton alignment.Both bands have shown upbend at ω_(1)~0.26 MeV/h and ω_(2)~0.43 MeV/h.These crossing frequencies can be attributed to the decoupling of the first pair of h_(11/2) quasi-proton and h_(11/2) quasi-neutron,respectively.Four weaker bands have been observed in sidebands too.Among them,two states are possibly built on aπd_(5)/23/2^(+)[411]configuration.展开更多
Energy spectrum of yrast band for ^(122)Cs is studied by using particle-rotor model(PRM)of odd-odd nuclei,in which special attention is paid to the model basis accounting for the effect of the instabilityγvibration p...Energy spectrum of yrast band for ^(122)Cs is studied by using particle-rotor model(PRM)of odd-odd nuclei,in which special attention is paid to the model basis accounting for the effect of the instabilityγvibration perturbation around axial symmetry.In order to check the assignments of this band,two calculation schemes are put into practice.The first one is for previousπh11/2 vg7/2 configuration with bandhead spin I_(0)=(6^(-))which was obtained from cranked shell model(CSM)calculation,and the other one is forπh_(11/2) vh_(11/2) configuration with I_(0)=(9^(+))supported by the systematic analyses of experimental data.A qualitative comparison between the present PRM calculation and that of CSM has also been made.The results indicate that,rather thanπh_(11/2) vg_(7/2) I_(0)=(6^(-)),πh_(11/2) vh_(11/2) with I_(0)=(9^(+))is a more reasonable assignment to the yrast band in ^(122)Cs.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19635030the Science Foundation of the Nuclear Industry of China。
文摘High-spin states in the odd-proton nucleus^(135)pm have been investigated using the^(107)Ag(^(32)S,2p2n)^(135)pm reaction.Seven rotational bands have been observed in^(135)pm.The yrast band based on a decoupled h_(11/2)proton is found to have a band crossing in ω_(c)~0.43 MeV/h.Two positive-parity bands based on the two signature components of the πg_(7/2)5/2^(+)[413]Nilsson orbital have been observed in the main sidebands.The favoured band with(π,α)=(+,1/2)has been shown to populate below the first pair of proton alignment.Both bands have shown upbend at ω_(1)~0.26 MeV/h and ω_(2)~0.43 MeV/h.These crossing frequencies can be attributed to the decoupling of the first pair of h_(11/2) quasi-proton and h_(11/2) quasi-neutron,respectively.Four weaker bands have been observed in sidebands too.Among them,two states are possibly built on aπd_(5)/23/2^(+)[411]configuration.
基金Supported by the National Natural Science Foundation of China under Grant No.19475030。
文摘Energy spectrum of yrast band for ^(122)Cs is studied by using particle-rotor model(PRM)of odd-odd nuclei,in which special attention is paid to the model basis accounting for the effect of the instabilityγvibration perturbation around axial symmetry.In order to check the assignments of this band,two calculation schemes are put into practice.The first one is for previousπh11/2 vg7/2 configuration with bandhead spin I_(0)=(6^(-))which was obtained from cranked shell model(CSM)calculation,and the other one is forπh_(11/2) vh_(11/2) configuration with I_(0)=(9^(+))supported by the systematic analyses of experimental data.A qualitative comparison between the present PRM calculation and that of CSM has also been made.The results indicate that,rather thanπh_(11/2) vg_(7/2) I_(0)=(6^(-)),πh_(11/2) vh_(11/2) with I_(0)=(9^(+))is a more reasonable assignment to the yrast band in ^(122)Cs.
