In-gas-cell laser spectroscopy for magnetic dipole moment of $^{199}$Pt toward $N=$ 126

Y. Hirayama; M. Mukai; Y. X. Watanabe; S. C. Jeong; H. S. Jung; Y. Kakiguchi; S. Kimura; J. Y. Moon; M. Oyaizu; J. H. Park; P. Schury; M. Wada; H. Miyatake

doi:10.1103/physrevc.96.014307

arXiv · 1605.03674

In-gas-cell laser spectroscopy for magnetic dipole moment of $^{199}$Pt toward $N=$ 126

Y. Hirayama·M. Mukai·Y. X. Watanabe·S. C. Jeong·H. S. Jung·Y. Kakiguchi·S. Kimura·J. Y. Moon·M. Oyaizu·J. H. Park·P. Schury·M. Wada·H. Miyatake

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Abstract

Magnetic dipole moment and mean-square charge radius of $^{199}$Pt ($I^π=$ 5/2$^-$) have been evaluated for the first time from the investigation of the hyperfine splitting of the $λ_1=$ 248.792 nm transition by in-gas-cell laser ionization spectroscopy. Neutron-rich nucleus $^{199}$Pt was produced by multi-nucleon transfer reaction at the KISS where the nuclear spectroscopy in the vicinity of $N=$ 126 is planed from the aspect of an astrophysical interest as well as the nuclear structure. Measured magnetic dipole moment $+$0.63(13)$μ_{\rm N}$ is consistent with the systematics of those of nuclei with $I^π=$ 5/2$^-$. The deformation parameter $|<β_2^2>^{1/2}|$ evaluated from the isotope shift indicates the gradual shape change to spherical shape of platinum isotopes with increasing neutron number toward $N=$ 126.

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Y. Hirayama, M. Mukai, Y. X. Watanabe, S. C. Jeong, H. S. Jung, Y. Kakiguchi, S. Kimura, J. Y. Moon, M. Oyaizu, J. H. Park, P. Schury, M. Wada, H. Miyatake. 2016-05-12. In-gas-cell laser spectroscopy for magnetic dipole moment of $^{199}$Pt toward $N=$ 126. https://doi.org/10.1103/physrevc.96.014307

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