Mean lifetimes of the h_(11/2) quasineutron band in 129Ce were measured by using the Doppler shift attenuation method in connection with the reaction ^(116)Sn(^(l6)O,3n)^(129)Ce at a bombarding energy of 73MeV.The dat...Mean lifetimes of the h_(11/2) quasineutron band in 129Ce were measured by using the Doppler shift attenuation method in connection with the reaction ^(116)Sn(^(l6)O,3n)^(129)Ce at a bombarding energy of 73MeV.The data indicate that transition quadrupole moment of ^(129)Ce is smaller than that of 128Ce.This reduction in collectivity caused by the addition of an h_(11/2) neutron can be interpreted as due to triaxiality induced byγdriving effect.展开更多
Lifetimes of the high spin states in the negative parity band of ^(126)Ba were measured by using the Doppler shift attenuation method in conjunction with the reaction ^(116)Sn(^(16)O,2p4n)^(126) Ba at a beam energy of...Lifetimes of the high spin states in the negative parity band of ^(126)Ba were measured by using the Doppler shift attenuation method in conjunction with the reaction ^(116)Sn(^(16)O,2p4n)^(126) Ba at a beam energy of 73 MeV.This band shows a typically collective behavior and possesses a near-axial prolate shape with a deformation parameter β_(2)=0.27±0.01 and triaxiality γ~-5°.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19675067the Science Foundation'of Nuclear Industry of China under Grant No.H7196A0115。
文摘Mean lifetimes of the h_(11/2) quasineutron band in 129Ce were measured by using the Doppler shift attenuation method in connection with the reaction ^(116)Sn(^(l6)O,3n)^(129)Ce at a bombarding energy of 73MeV.The data indicate that transition quadrupole moment of ^(129)Ce is smaller than that of 128Ce.This reduction in collectivity caused by the addition of an h_(11/2) neutron can be interpreted as due to triaxiality induced byγdriving effect.
基金Supported by the National Natural Science Foundation of China under Grant No.19675067the Science Foundation of Nuclear Industry of China under Grant No.H7196A0115.
文摘Lifetimes of the high spin states in the negative parity band of ^(126)Ba were measured by using the Doppler shift attenuation method in conjunction with the reaction ^(116)Sn(^(16)O,2p4n)^(126) Ba at a beam energy of 73 MeV.This band shows a typically collective behavior and possesses a near-axial prolate shape with a deformation parameter β_(2)=0.27±0.01 and triaxiality γ~-5°.
