scholarly journals New evaluation of proton structure corrections to hydrogen hyperfine splitting

2007 ◽  
Vol 85 (5) ◽  
pp. 429-439 ◽  
Author(s):  
Carl E Carlson
Keyword(s):  
Form Factor ◽  
Hyperfine Structure ◽  
Ground State ◽  
Hyperfine Splitting ◽  
State Of The Art ◽  
Proton Structure ◽  
A Value ◽  
Elastic Proton ◽  
14.20 Dh ◽  
Modern Form

We consider the proton structure corrections to the hydrogen ground-state hyperfine structure, focusing on a state-of-the-art evaluation of the inelastic nucleon corrections — the polarizability corrections — using analytic fits to the most recent data. We find a value for the fractional correction Δpol of 1.3 ± 0.3 ppm. This is 1–2 ppm smaller than the value of Δpol one would deduce using hyperfine-splitting data and elastic proton structure corrections obtained from modern form factor fits. In addition, we discuss the derivations of the relevant formulas, paying attention to lepton mass effects and to questions surrounding the use of unsubtracted dispersion relations. PACS Nos.: 31.30.Gs, 32.10.Fn, 14.20.Dh, 13.40.Gp

Proton Zemach radius and the hyperfine splitting of the ground state of muonic hydrogen

2005 ◽  
Vol 83 (4) ◽  
pp. 351-356 ◽  
Author(s):  
D Bakalov ◽  
A Beswick ◽  
A Dupays ◽  
C Rizzo
Keyword(s):  
Experimental Data ◽  
Hyperfine Structure ◽  
Ground State ◽  
Present Status ◽  
Hyperfine Splitting ◽  
Muonic Hydrogen ◽  
Satisfactory Accuracy

Recently, the Zemach radius of the proton has been calculated from experimental data using four different approaches, and the results do not agree with each other within the claimed accuracy. We assume that the puzzle might be solved by determining the Zemach radius from the hyperfine splitting of muonic hydrogen, and overview the present status of the theory of the hyperfine structure of muonic hydrogen as well as the possibilities to measure it with a satisfactory accuracy. PACS Nos.: 36.10.–k, 32.10.Fn, 21.10.Ky, 13.40.Gp

Ground-State Hyperfine Structure ofDy165

1968 ◽  
Vol 165 (4) ◽  
pp. 1360-1362 ◽  
Author(s):  
Alan T. Ramsey ◽  
Sanford Stein
Keyword(s):  
Hyperfine Structure ◽  
Ground State

Toward the measurement of the hyperfine splitting in the ground state of muonic hydrogen

2015 ◽  
Vol 233 (1-3) ◽  
pp. 97-101 ◽  
Author(s):  
Dimitar Bakalov ◽  
Andrzej Adamczak ◽  
Mihail Stoilov ◽  
Andrea Vacchi
Keyword(s):  
Ground State ◽  
Hyperfine Splitting ◽  
Muonic Hydrogen

scholarly journals Ground-state hyperfine splitting in the Be+ion

2014 ◽  
Vol 89 (3) ◽  
Author(s):  
Mariusz Puchalski ◽  
Krzysztof Pachucki
Keyword(s):  
Ground State ◽  
Hyperfine Splitting

A meta-analysis and review examining a possible role for oxidative stress and singlet oxygen in diverse diseases

2017 ◽  
Vol 474 (16) ◽  
pp. 2713-2731 ◽  
Author(s):  
Athinoula L. Petrou ◽  
Athina Terzidaki
Keyword(s):  
Oxidative Stress ◽  
Excited State ◽  
Singlet Oxygen ◽  
Ground State ◽  
Meta Analysis ◽  
Common Mechanism ◽  
High Electron ◽  
A Value ◽  
First Excited State

From kinetic data (k, T) we calculated the thermodynamic parameters for various processes (nucleation, elongation, fibrillization, etc.) of proteinaceous diseases that are related to the β-amyloid protein (Alzheimer's), to tau protein (Alzheimer's, Pick's), to α-synuclein (Parkinson's), prion, amylin (type II diabetes), and to α-crystallin (cataract). Our calculations led to ΔG≠ values that vary in the range 92.8–127 kJ mol−1 at 310 K. A value of ∼10–30 kJ mol−1 is the activation energy for the diffusion of reactants, depending on the reaction and the medium. The energy needed for the excitation of O2 from the ground to the first excited state (1Δg, singlet oxygen) is equal to 92 kJ mol−1. So, the ΔG≠ is equal to the energy needed for the excitation of ground state oxygen to the singlet oxygen (1Δg first excited) state. The similarity of the ΔG≠ values is an indication that a common mechanism in the above disorders may be taking place. We attribute this common mechanism to the (same) role of the oxidative stress and specifically of singlet oxygen, (1Δg), to the above-mentioned processes: excitation of ground state oxygen to the singlet oxygen, 1Δg, state (92 kJ mol−1), and reaction of the empty π* orbital with high electron density regions of biomolecules (∼10–30 kJ mol−1 for their diffusion). The ΔG≠ for cases of heat-induced cell killing (cancer) lie also in the above range at 310 K. The present paper is a review and meta-analysis of literature data referring to neurodegenerative and other disorders.

Hyperfine structure investigations in the4F9/2 atomic ground state of191Ir and193Ir

1973 ◽  
Vol 263 (4) ◽  
pp. 341-346 ◽  
Author(s):  
S. Büttgenbach ◽  
M. Herschel ◽  
G. Meisel ◽  
E. Schrödl ◽  
W. Witte ◽  
...  
Keyword(s):  
Hyperfine Structure ◽  
Ground State ◽  
Atomic Ground State ◽  
Structure Investigations

Reactions of (η5-C9H7)Rh(η2-C2H4)2 with quinones: molecular structure of [(η5-C9H7)Rh(2,3,5,6-C6O2(CH3)4)]

1999 ◽  
Vol 77 (2) ◽  
pp. 199-204
Author(s):  
Stephen A Westcott ◽  
Nicholas J Taylor ◽  
Todd B Marder
Keyword(s):  
Molecular Structure ◽  
Least Squares ◽  
Ground State ◽  
Slip Parameter ◽  
X Ray Diffraction ◽  
X Ray ◽  
A Value ◽  
Hinge Angle

Reactions of (η5-C9H7)Rh(η2-C2H4)2 (1) with quinones were investigated. Substitution of the labile ethylene ligands was observed upon addition of either duroquinone (2,3,5,6-tetramethyl-1,4-benzoquinone) or 1,4-benzoquinone to complex 1. The molecular structure of neutral (η5-C9H7)Rh(2,3,5,6-C6O2(CH3)4) (3), determined by X-ray diffraction, shows that the duroquinone ligand lies in a plane nearly parallel to the indenyl group. The carbonyl moieties of duroquinone lie in a plane incorporating Rh, C2, and the midpoint between C3a and C7a of the indenyl ring. The slip parameter (Δ= d(average Rh-C3a,7a) -d(average Rh-C1,3)) was calculated to be 0.112(2) Å; whereas a value of ca. 0.05 Å had been obtained previously from film data. Values for the hinge angle (HA = angle between normals to the least-squares planes defined by C1, C2, C3 and C1, C7a, C3a, C3) and fold angle (FA = angle between normals to the least-squares planes defined by C1, C2, C3 and C3a, C4, C5, C7, C7a) are 7.2° and 4.0°, respectively.Key words: indenyl, rhodium, quinones, ring-slippage, ground-state distortion.

High accuracy measurement of the ground-state hyperfine splitting in a 113Cd+ microwave clock: erratum

2021 ◽  
Vol 46 (20) ◽  
pp. 5207
Author(s):  
K. Miao ◽  
J. W. Zhang ◽  
X. L. Sun ◽  
S. G. Wang ◽  
A. M. Zhang ◽  
...  
Keyword(s):  
Ground State ◽  
Hyperfine Splitting ◽  
High Accuracy ◽  
Accuracy Measurement ◽  
High Accuracy Measurement

scholarly journals Thin-film superconducting resonator tunable to the ground-state hyperfine splitting of 87Rb

AIP Advances ◽  
2011 ◽  
Vol 1 (4) ◽  
pp. 042107 ◽  
Author(s):  
Z. Kim ◽  
C. P. Vlahacos ◽  
J. E. Hoffman ◽  
J. A. Grover ◽  
K. D. Voigt ◽  
...  
Keyword(s):  
Thin Film ◽  
Ground State ◽  
Hyperfine Splitting ◽  
Superconducting Resonator
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