The Experts below are selected from a list of 4563 Experts worldwide ranked by ideXlab platform
C Yuan - One of the best experts on this subject based on the ideXlab platform.
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Measurement of an unusually large magnetic octupole moment in $^{45}$Sc challenges state-of-the-art nuclear-structure theory
arXiv: Nuclear Experiment, 2020Co-Authors: R. P. De Groote, J. Moreno, Jacek Dobaczewski, I. D. Moore, Mikael Reponen, B. K. Sahoo, C YuanAbstract:We measure the hyperfine $C$-constant of the $3d4s^2 ~^2D_{5/2}$ atomic state in $^{45}$Sc: $C=-0.25(12)$\,kHz. High-precision atomic calculations of the hyperfine structure of the $3d4s^2 ~^2D_{5/2}$ state and second-order corrections are performed to infer the nuclear magnetic octupole moment $\Omega = 1.6(8) \mu_N b$. With a single valence proton outside of the doubly-magic Calcium core, this element is ideally suited for an in-depth study of the many intriguing nuclear structure phenomena observed within the neighboring Isotopes of Calcium. We compare $\Omega$ to shell-model calculations, and find that they cannot reproduce the experimental value of $\Omega$ for $^{45}$Sc. We furthermore explore the use of Density Functional Theory for evaluating $\Omega$, and obtain values in line with the shell-model calculations. This work provides a crucial step in guiding future measurements of this fundamental quantity on radioactive scandium Isotopes and will hopefully motivate a renewed experimental and theoretical interest.
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measurement of an unusually large magnetic octupole moment in 45 sc challenges state of the art nuclear structure theory
arXiv: Nuclear Experiment, 2020Co-Authors: R. P. De Groote, J. Moreno, Jacek Dobaczewski, I. D. Moore, Mikael Reponen, B. K. Sahoo, C YuanAbstract:We measure the hyperfine $C$-constant of the $3d4s^2 ~^2D_{5/2}$ atomic state in $^{45}$Sc: $C=-0.25(12)$\,kHz. High-precision atomic calculations of the hyperfine structure of the $3d4s^2 ~^2D_{5/2}$ state and second-order corrections are performed to infer the nuclear magnetic octupole moment $\Omega = 1.6(8) \mu_N b$. With a single valence proton outside of the doubly-magic Calcium core, this element is ideally suited for an in-depth study of the many intriguing nuclear structure phenomena observed within the neighboring Isotopes of Calcium. We compare $\Omega$ to shell-model calculations, and find that they cannot reproduce the experimental value of $\Omega$ for $^{45}$Sc. We furthermore explore the use of Density Functional Theory for evaluating $\Omega$, and obtain values in line with the shell-model calculations. This work provides a crucial step in guiding future measurements of this fundamental quantity on radioactive scandium Isotopes and will hopefully motivate a renewed experimental and theoretical interest.
Anura V Kurpad - One of the best experts on this subject based on the ideXlab platform.
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assessing bone mineral changes in response to vitamin d supplementation using natural variability in stable Isotopes of Calcium in urine
Scientific Reports, 2018Co-Authors: R Rangarajan, Surajit Mondal, Prashanth Thankachan, Ramananda Chakrabarti, Anura V KurpadAbstract:Osteoporosis is a chronic disease of public health importance, particularly in low and middle income countries. Measuring the bone mineral balance (BMB) in a non-invasive manner, and its response to different interventions, is critical to the definition of optimal strategies for its prevention and management. In this study, we demonstrate the usefulness of natural variability in Calcium Isotopes (δ44/40Ca) of urine and the derived BMB estimates as a biomarker of bone health and its responsiveness to interventions. Vitamin D3 is commonly used as a supplement for the prevention and treatment of osteoporosis, along with Calcium supplements. We studied the effect of a short term vitamin D3 supplementation on changes in urine δ44/40Ca and the derived BMB. δ44/40Ca before and after the vitamin D3 supplementation yielded a statistically significant change (p = 0.050) with a positive δ44/40Ca enrichment. The mean derived BMB was net positive (0.04 ± 0.05) in comparison to a net negative value for the control group (−0.03 ± 0.01). These results indicate the potential usefulness of urinary natural δ44/40Ca and the derived BMB, which, along with bone mineral density could be used as a sensitive marker for precision in the prevention and treatment of osteoporosis.
Michael Drewsen - One of the best experts on this subject based on the ideXlab platform.
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isotope shifts of the 4s2 1s0 4s5p 1p1 transition and hyperfine splitting of the 4s5p 1p1 state in Calcium
Physical Review A, 2004Co-Authors: A Mortensen, J Lindballe, Inger S Jensen, Peter Staanum, Dirk Voigt, Michael DrewsenAbstract:Using a technique based on production of ion Coulomb crystals, the isotope shifts of the $4{s}^{2}$ $^{1}S_{0}\ensuremath{\rightarrow}4s5p$ $^{1}P_{1}$ transition for all naturally occurring Isotopes of Calcium as well as the hyperfine splitting of the $4s5p$ $^{1}P_{1}$ state in $^{43}\mathrm{Ca}$ have been measured. The field shift and specific mass shift coefficients as well as the hyperfine structure constants for $^{43}\mathrm{Ca}$ have been derived from the data.
R. P. De Groote - One of the best experts on this subject based on the ideXlab platform.
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Measurement of an unusually large magnetic octupole moment in $^{45}$Sc challenges state-of-the-art nuclear-structure theory
arXiv: Nuclear Experiment, 2020Co-Authors: R. P. De Groote, J. Moreno, Jacek Dobaczewski, I. D. Moore, Mikael Reponen, B. K. Sahoo, C YuanAbstract:We measure the hyperfine $C$-constant of the $3d4s^2 ~^2D_{5/2}$ atomic state in $^{45}$Sc: $C=-0.25(12)$\,kHz. High-precision atomic calculations of the hyperfine structure of the $3d4s^2 ~^2D_{5/2}$ state and second-order corrections are performed to infer the nuclear magnetic octupole moment $\Omega = 1.6(8) \mu_N b$. With a single valence proton outside of the doubly-magic Calcium core, this element is ideally suited for an in-depth study of the many intriguing nuclear structure phenomena observed within the neighboring Isotopes of Calcium. We compare $\Omega$ to shell-model calculations, and find that they cannot reproduce the experimental value of $\Omega$ for $^{45}$Sc. We furthermore explore the use of Density Functional Theory for evaluating $\Omega$, and obtain values in line with the shell-model calculations. This work provides a crucial step in guiding future measurements of this fundamental quantity on radioactive scandium Isotopes and will hopefully motivate a renewed experimental and theoretical interest.
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measurement of an unusually large magnetic octupole moment in 45 sc challenges state of the art nuclear structure theory
arXiv: Nuclear Experiment, 2020Co-Authors: R. P. De Groote, J. Moreno, Jacek Dobaczewski, I. D. Moore, Mikael Reponen, B. K. Sahoo, C YuanAbstract:We measure the hyperfine $C$-constant of the $3d4s^2 ~^2D_{5/2}$ atomic state in $^{45}$Sc: $C=-0.25(12)$\,kHz. High-precision atomic calculations of the hyperfine structure of the $3d4s^2 ~^2D_{5/2}$ state and second-order corrections are performed to infer the nuclear magnetic octupole moment $\Omega = 1.6(8) \mu_N b$. With a single valence proton outside of the doubly-magic Calcium core, this element is ideally suited for an in-depth study of the many intriguing nuclear structure phenomena observed within the neighboring Isotopes of Calcium. We compare $\Omega$ to shell-model calculations, and find that they cannot reproduce the experimental value of $\Omega$ for $^{45}$Sc. We furthermore explore the use of Density Functional Theory for evaluating $\Omega$, and obtain values in line with the shell-model calculations. This work provides a crucial step in guiding future measurements of this fundamental quantity on radioactive scandium Isotopes and will hopefully motivate a renewed experimental and theoretical interest.
A Mortensen - One of the best experts on this subject based on the ideXlab platform.
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isotope shifts of the 4s2 1s0 4s5p 1p1 transition and hyperfine splitting of the 4s5p 1p1 state in Calcium
Physical Review A, 2004Co-Authors: A Mortensen, J Lindballe, Inger S Jensen, Peter Staanum, Dirk Voigt, Michael DrewsenAbstract:Using a technique based on production of ion Coulomb crystals, the isotope shifts of the $4{s}^{2}$ $^{1}S_{0}\ensuremath{\rightarrow}4s5p$ $^{1}P_{1}$ transition for all naturally occurring Isotopes of Calcium as well as the hyperfine splitting of the $4s5p$ $^{1}P_{1}$ state in $^{43}\mathrm{Ca}$ have been measured. The field shift and specific mass shift coefficients as well as the hyperfine structure constants for $^{43}\mathrm{Ca}$ have been derived from the data.