Nuclear Mass Dependence of the Dirac–Breit–Pauli Hamiltonian

1974 ◽  
Vol 52 (6) ◽  
pp. 536-540 ◽  
Author(s):  
Jacek Karwowski ◽  
Serafin Fraga
Keyword(s):  
Mass Effect ◽  
Mass Dependence ◽  
Neutral Atoms ◽  
Nuclear Mass ◽  
Specific Mass ◽  
Hartree Fock ◽  
Relativistic Mass ◽  
Mass Correction ◽  
Order Of Magnitude ◽  
Mass Dependent

The nuclear mass dependent (relativistic, specific, and normal) corrections for many electron atoms are discussed. Numerical values, determined from Hartree–Fock functions for all the neutral atoms from helium through nobelium, show that the relativistic mass correction, never included in actual calculations, is of the same order of magnitude as the specific mass effect.

A Hartree-Fock nuclear mass formula

2003 ◽  
pp. 15-18
Author(s):  
J. M. Pearson ◽  
S. Goriely ◽  
M. Samyn
Keyword(s):  
Mass Formula ◽  
Nuclear Mass ◽  
Hartree Fock

A Hartree-Fock nuclear mass formula

2002 ◽  
Vol 15 (1-2) ◽  
pp. 13-16 ◽  
Author(s):  
J.M. Pearson ◽  
S. Goriely ◽  
M. Samyn
Keyword(s):  
Mass Formula ◽  
Nuclear Mass ◽  
Hartree Fock

BEWARE OF MOVING TARGETS: REFERENCE PROTEOME CONTENT FLUCTUATES SUBSTANTIALLY OVER THE YEARS

2012 ◽  
Vol 10 (06) ◽  
pp. 1250020 ◽  
Author(s):  
FERNANDA L. SIROTA ◽  
ARSEN BATAGOV ◽  
GEORG SCHNEIDER ◽  
BIRGIT EISENHABER ◽  
FRANK EISENHABER ◽  
...  
Keyword(s):  
Functional Annotation ◽  
Mass Spectrometry Data ◽  
Hypothetical Proteins ◽  
Moving Targets ◽  
Specific Mass ◽  
Sequence Identity ◽  
Order Of Magnitude ◽  
History Of ◽  
Reference Proteome ◽  
Over Time

Reference proteomes are generated by increasingly sophisticated annotation pipelines as part of regular genome build releases; yet, the corresponding changes in reference proteomes' content are dramatic. In the history of the NCBI-curated human proteome, the total number of entries has remained roughly constant but approximately half of the proteins from the 2003 build 33 are no longer represented by entries in current releases, while about the same number of new proteins have been added (for sequence identity thresholds 50–90%). Although mostly hypothetical proteins are affected, there are also spectacular cases of entry removal/addition of well studied proteins. The changes between the 2003 and recent human proteomes are in a similar order of magnitude as the differences between recent human and chimpanzee proteome releases. As an application example, we show that the proteome fluctuations affect the interpretation (about 74% of hits) of organelle-specific mass-spectrometry data. Although proteome quality tends to improve with more recent releases as, for example, the fraction of proteins with functional annotation has increased over time, existing evidence implies that, apparently, the proteome content still remains incomplete, not just pertaining to isoforms/sequence variants but also to proteins and their families that are clearly distinct.

scholarly journals 16. Some effects of hydromagnetic waves in the solar atmosphere

1958 ◽  
Vol 6 ◽  
pp. 141-149
Author(s):  
J. H. Piddington
Keyword(s):  
Observational Data ◽  
Solar Atmosphere ◽  
Solar Heating ◽  
Neutral Atoms ◽  
Order Of Magnitude ◽  
Rate Of Absorption ◽  
Hydromagnetic Waves

A hitherto undisclosed source of absorption of hydromagnetic waves, due to the presence of neutral atoms, is investigated quantitatively. In the chromosphere the rate of absorption due to this effect may be 1010 times greater than that due to ordinary viscosity.General solar heating, due to hydromagnetic waves caused by granules, is investigated and order-of-magnitude agreement with observational data is found.The new effect is discussed in connexion with heating near sunspots and with flares.

Isotope shift and hyper fine structure in the spectrum of tin

1964 ◽  
Vol 280 (1382) ◽  
pp. 439-446 ◽  
Keyword(s):  
Fine Structure ◽  
Isotope Shift ◽  
Mass Effect ◽  
Specific Mass ◽  
Normal Mass ◽  
Configuration Mixing ◽  
Volume Shift ◽  
And Shifts ◽  
Hyper Fine Structure ◽  
Specific Mass Shift

Shifts between all the even isotopes of tin ( Z = 50) have been measured interferometrically, for enriched samples, in the line 3283 Å of the spectrum of Sn II. The h.f.s. and shifts relative to the even isotopes of two of the three odd isotopes have also been measured. The results are compared with those obtained by other workers on the tin lines 6454 and 5799 Å, (i) in order to obtain absolute values of the volume shift constant for the tin isotopes, which involves estimation of the specific mass shift in the lines, and (ii) to calculate the configuration mixing in some of the levels concerned. After allowing for normal mass effect only the measured shifts are: 112-114; 22.0 mK; 114-116, 21.9 mK; 116-118, 18.0 mK; 118-120, 18.4 mK; 120-122, 16.6 mK; 122-124, 11.7 mK; 116-117, 8.4 mK; 118-119, 2.4 mK. A hyperfine doublet was observed in 3283 Å for both 117 Sn and 119 Sn; the splittings are 153.6 and 162.3 mK respectively and are attributed to the lower level involved in the transition.

Nuclear mass formula via an approximation to the Hartree—Fock method

1995 ◽  
Vol 61 (1) ◽  
pp. 127-176 ◽  
Author(s):  
Y. Aboussir ◽  
J.M. Pearson ◽  
A.K. Dutta ◽  
F. Tondeur
Keyword(s):  
Mass Formula ◽  
Nuclear Mass ◽  
Hartree Fock

Analytical Hartree‐Fock wavefunctions for the neutral atoms from helium to xenon

1974 ◽  
Vol 60 (8) ◽  
pp. 3342-3342 ◽  
Author(s):  
Carla Roetti ◽  
Enrico Clementi
Keyword(s):  
Neutral Atoms ◽  
Hartree Fock

scholarly journals An accurate parameterization for scattering factors, electron densities and electrostatic potentials for neutral atoms that obey all physical constraints

2014 ◽  
Vol 70 (6) ◽  
pp. 636-649 ◽  
Author(s):  
I. Lobato ◽  
D. Van Dyck
Keyword(s):  
Electron Scattering ◽  
Neutral Atoms ◽  
Efficient Procedure ◽  
X Ray ◽  
Physical Constraints ◽  
Order Of Magnitude ◽  
Scattering Factor ◽  
Relativistic Hydrogen ◽  
Better Than

An efficient procedure and computer program are outlined for fitting numerical X-ray and electron scattering factors with the correct inclusion of all physical constraints. The numerical electron scattering factors have been parameterized using five analytic non-relativistic hydrogen electron scattering factors as basis functions for 103 neutral atoms of the periodic table. The inclusion of the correct physical constraints in the electron scattering factor and its derived quantities allows the use of the new parameterization in different fields. In terms of quality of the fit, the proposed parameterization of the electron scattering factor is one order of magnitude better than the previous analytic fittings.

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