g-factor and quadrupole moment of the isomeric state in ¹³¹La: Signature for a weakly-deformed magnetic rotational band head

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• 作者：Jasmeet Kaur^a ; Neeraj Bansal^b ; A.K. Bhati^a ; ^{akbhati@pu.ac.in} ; R. Kumar^c ; Vijay R. Sharma^d ; K. Kapoor^a ; V. Kumar^e ; Navneet Kaur^a
• 关键词：Static quadrupole moment and g-factor ; Time differential perturbed angular distribution ; Oblate 3-quasiproton isomer ; Magnetic dipole band
• 刊名：Physics Letters B
• 出版年：2017
• 出版时间：10 February 2017
• 年：2017
• 卷：765
• 期：Complete
• 页码：317-322
• 全文大小：469 K
• 卷排序：765

文摘

The g  -factor and the static quadrupole moment of a magnetic rotational band head 212− at 2121 keV in 131La have been determined by means of the time-differential perturbed angular distribution technique. The measured value of the g  -factor, +1.060(4)+1.060(4), is in agreement with the theoretical value for a three quasi-proton, π3{112−[505]⊗52+[422]⊗52+[413]} Nilsson configuration assignment. The observed spectroscopic quadrupole moment ratio, Qs(212−,131La)Qs(192−,137La)=0.457(4), supports the collective oblate shape (γ∼−60°)(γ∼−60°) with quadrupole deformation β2<0.07β2<0.07. The half-life of the 212− state, 37.2(1) ns, is re-measured with better accuracy.