Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions

Silwal, Roshani; Lapierre, A.; Gillaspy, John D.; Dreiling, Joan; Blundell, S. A.; Dipti, Dipti; Borovik, A.; Gwinner, G.; Villari, A. C. C.; Ralchenko, Yu.; Takács, Endre

doi:10.1103/physreva.98.052502

Cited by 14 publications

(10 citation statements)

References 43 publications

(59 reference statements)

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“…Table. 9 displays comparison of the present and aforementioned studies [58,59,60]. We observed that our calculated FS values show an excellent agreement with [59], but the SMS results have a relative error of 5.7% and 2.4% in Ar 7+ and Xe 43+ , respectively.…”

Section: Isotope Shiftssupporting

confidence: 74%

“…We listed them in Table S9 (supplementary data). Previous results of IS factors are available from the MBPT calculations of Safronova and Johnson [58] for Ar 7+ , CIDF results of Tupitsyn et al [59] for Ar 7+ and Xe 43+ , and RMBPT and GRASP values of Silwal et al [60] for Xe 43+ . Table.…”

Section: Isotope Shiftsmentioning

confidence: 99%

“…Tupitsyn et al [59] reported the FS and SMS for 3p 1 2 − 3s 1 2 transition of Na-like Ar and Xe ions by performing large-scale configuration interaction Dirac-Fock (CIDF) calculations. Using the EBIT facility at NIST, Silwal et al [60,61] measured the mass shifts (MS) and FS for D1 and D2 transitions between sodium like 124 Xe and 136 Xe ions. An evident scarcity of the results of the atomic structures for higher excited states of sodium-like ions can be pictured from the studies mentioned above, especially for Xe and Kr; only a few are fully relativistic.…”

Section: Introductionmentioning

confidence: 99%

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Relativistic Calculation of Energies, Transition Parameters Hyperfine Structure, Landé g$_J$ and Isotope shifts factors for Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions

Rathi¹,

Sharma²

2022

Preprint

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In this study, comprehensive calculations of energies, hyperfine structure constants, Landé g J factors and isotope shifts have been performed for the lowest 71 states of Na-like Ar 7+ , Kr 25+ and Xe 43+ ions. Radiative parameters viz., wavelengths, transition rates, oscillator strengths and lifetimes are also estimated for the electric and magnetic dipole (E1,M1) and quadrupole (E2,M2) transitions among these levels. The states under consideration include 1s 2 2s 2 2p 6 nl for n = 3−9, l = 0 − 6, and the fully relativistic multiconfiguration Dirac-Fock (MCDF) method integrated in the latest version of the general-purpose relativistic atomic structure package (GRASP) is used for the calculations. The relativistic corrections, viz., Breit interactions and quantum electrodynamics effects are also included in the present work and their effects on energies and other parameters are analysed. We also examined the impact of including the core-core and core valence correlations on level energies. Further, to inspect the reliability of our MCDF results, we performed another set of calculations using the many-body perturbation theory inbuilt into the Flexible Atomic Code (FAC). A thorough comparison between the two obtained calculations and with the previous theoretical and experimental results, wherever available, is carried out and a good agreement is observed. The present calculations will considerably extend the already existing results for these Na-like ions as most of the results are reported for the first time. Further, we believe that our results are of high accuracy and will be beneficial for spectral analysis and diagnosis in plasma and astrophysics.

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Section: Isotope Shiftssupporting

confidence: 74%

Section: Isotope Shiftsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relativistic Calculation of Energies, Transition Parameters Hyperfine Structure, Landé g$_J$ and Isotope shifts factors for Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions

Rathi¹,

Sharma²

2022

Preprint

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“…Characterizing the nonlinearities arising from within the SM can provide new information about the nucleus [88], especially in combination with improved electronicstructure calculations. On the other hand, if evidence for a new boson should emerge from the improved measurements, it can be independently verified by performing similar measurements on other atomic species [10], such as Ca=Ca þ [13,89], Sr=Sr þ [12,14], Nd þ [90], or on highly charged ions [91][92][93][94], as well as on molecules like Sr 2 [95]. Unstable isotopes (e.g., 166 Yb with a half-life of ∼2.4 days) can be used to increase the number of points in the King Plot, providing strong further constraints on the origin of the nonlinearity.…”

mentioning

confidence: 99%

Evidence for Nonlinear Isotope Shift in Yb+ Search for New Boson

et al. 2020

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We measure isotope shifts for five Yb þ isotopes with zero nuclear spin on two narrow optical quadrupole transitions 2 S 1=2 → 2 D 3=2 , 2 S 1=2 → 2 D 5=2 with an accuracy of ∼300 Hz. The corresponding King plot shows a 3 × 10 −7 deviation from linearity at the 3σ uncertainty level. Such a nonlinearity can indicate physics beyond the Standard Model (SM) in the form of a new bosonic force carrier, or arise from higherorder nuclear effects within the SM. We identify the quadratic field shift as a possible nuclear contributor to the nonlinearity at the observed scale, and show how the nonlinearity pattern can be used in future, more accurate measurements to separate a new-boson signal from nuclear effects.

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“…One such system was built at the National Institute of Standards and Technology (NIST) in 1993 and quickly began producing results 7 . Since its inception, the NIST EBIT has been used to take measurements across a variety of fields, including fundamental atomic physics [8][9][10] , spectroscopy of highlycharged ions for fusion and lithography [11][12][13] , laboratory astrophysics [14][15][16][17][18] , and nuclear physics 19 .…”

Section: Introductionmentioning

confidence: 99%

A transition-edge sensor-based x-ray spectrometer for the study of highly charged ions at the National Institute of Standards and Technology electron beam ion trap

Szypryt

O’Neil

Takács

et al. 2019

Review of Scientific Instruments

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We report on the design, commissioning, and initial measurements of a Transition-edge Sensor (TES) x-ray spectrometer for the Electron Beam Ion Trap (EBIT) at the National Institute of Standards and Technology (NIST). Over the past few decades, the NIST EBIT has produced numerous studies of highly charged ions in diverse fields such as atomic physics, plasma spectroscopy, and laboratory astrophysics. The newly commissioned NIST EBIT TES Spectrometer (NETS) improves the measurement capabilities of the EBIT through a combination of high x-ray collection efficiency and resolving power. NETS utilizes 192 individual TES x-ray microcalorimeters (166/192 yield) to improve upon the collection area by a factor of ∼30 over the 4-pixel neutron transmutation doped germanium-based microcalorimeter spectrometer previously used at the NIST EBIT. The NETS microcalorimeters are optimized for the x-ray energies from roughly 500 eV to 8,000 eV and achieve an energy resolution of 3.7 eV to 5.0 eV over this range, a more modest (< 2×) improvement over the previous microcalorimeters. Beyond this energy range NETS can operate with various trade-offs, the most significant of which are reduced efficiency at lower energies and being limited to a subset of the pixels at higher energies. As an initial demonstration of the capabilities of NETS, we measured transitions in He-like and H-like O, Ne, and Ar as well as Ni-like W. We detail the energy calibration and data analysis techniques used to transform detector counts into x-ray spectra, a process that will be the basis for analyzing future data.

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Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions

Cited by 14 publications

References 43 publications

Relativistic Calculation of Energies, Transition Parameters Hyperfine Structure, Landé g$_J$ and Isotope shifts factors for Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions

Relativistic Calculation of Energies, Transition Parameters Hyperfine Structure, Landé g$_J$ and Isotope shifts factors for Ar$^{7+}$, Kr$^{25+}$ and Xe$^{43+}$ ions

Evidence for Nonlinear Isotope Shift in Yb+ Search for New Boson

A transition-edge sensor-based x-ray spectrometer for the study of highly charged ions at the National Institute of Standards and Technology electron beam ion trap

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