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Calculation of the Breit–Rosenthal Effect in Bi I

by Tarje Arntzen Røger and Jonas R. Persson

Atoms 2024, 12(12), 72; https://doi.org/10.3390/atoms12120072 - 20 Dec 2024

Viewed by 828

Corrections to the measured nuclear magnetic moments obtained from hyperfine structure measurements include the Breit–Rosenthal effect. In this paper, we present results from calculations on Bi using the GRASP2018 code. The results indicate that the Breit–Rosenthal effect is on the order of 0.1 [...] Read more.

% {fm}^{- 2}

, the same order of magnitude as neighbouring elements, while some atomic states may have one order of magnitude smaller values. The ground state

6 p^{3} {}^{4}S_{3 / 2}^{o}

is more sensitive to the Breit–Rosenthal effect, and hence the hyperfine anomaly, with a value of −0.25

% {fm}^{- 2}

. Full article

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11 pages, 650 KB

Open AccessArticle

Calculation of the Differential Breit-Rosenthal Effect in Pb

by Martin Kinden Karlsen and Jonas R. Persson

Atoms 2024, 12(1), 5; https://doi.org/10.3390/atoms12010005 - 16 Jan 2024

Cited by 1 | Viewed by 2059

Abstract

Recent advancements in studying long chains of unstable nuclei have revitalised interest in investigating the hyperfine anomaly. Hyperfine anomaly is particularly relevant for determining nuclear magnetic dipole moments using hyperfine structures where it limits the accuracy. This research paper focuses on the calculation [...] Read more.

6 p^{2}^{3} P_{1, 2}

^{1} D_{2}

and

6 p 7 s^{3} P_{1}

states in Pb, utilising the multi-configurational Dirac-Hartree-Fock code, GRASP2018. The findings show that the differential Breit-Rosenthal effect is typically less than

0.1 / f m^{2}

, which is often much smaller than the Bohr-Weisskopf effect. The differential Breit-Rosenthal effect for the

6 p^{2}^{3} P_{2}

state is one order of magnitude smaller than the rest, which is why this state seems to be insensible to the hyperfine anomaly. Full article

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13 pages, 317 KB

Open AccessArticle

Calculation of the Differential Breit–Rosenthal Effect in the 6s6p ³P_1,2 States of Hg

by Tarjei Heggset and Jonas R. Persson

Atoms 2020, 8(4), 86; https://doi.org/10.3390/atoms8040086 - 27 Nov 2020

Cited by 4 | Viewed by 2691

Abstract

Studies of the hyperfine anomaly has found a renewed interest with the recent development of techniques to study the properties of long chains of unstable nuclei. By using the hyperfine structure for determining the nuclear magnetic dipole moments, the hyperfine anomaly puts a [...] Read more.

6 s 6 p

^{3} P_{1, 2}

states in

^{199} H g

as a function of the change in nuclear radii, using the MCDHF code, GRASP2018. The differential Breit–Rosenthal effect was found to be of the order of

0.1 % f m^{- 2}

, in most cases much less than the Bohr-Weisskopf effect. The results also indicate that large calculations might not be necessary, with the present accuracy of the experimental values for the hyperfine anomaly. Full article

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