نتایج جستجو برای: atomic mass

تعداد نتایج: 562573  

Journal: :Monthly Notices of the Royal Astronomical Society 2021

ABSTRACT Measuring the H i–halo mass scaling relation (HIHM) is fundamental to understanding role of i in galaxy formation and its connection structure formation. While direct measurements haloes are possible using i-spectral stacking, reported shape depends on techniques used measure it (e.g. monotonically increasing with versus flat, mass-independent). Using a simulated optical survey produce...

Journal: :Physical review letters 2003
Lucia Hackermüller Stefan Uttenthaler Klaus Hornberger Elisabeth Reiger Björn Brezger Anton Zeilinger Markus Arndt

We demonstrate quantum interference for tetraphenylporphyrin, the first biomolecule exhibiting wave nature, and for the fluorofullerene C60F48 using a near-field Talbot-Lau interferometer. For the porphyrins, which are distinguished by their low symmetry and their abundant occurrence in organic systems, we find the theoretically expected maximal interference contrast and its expected dependence...

Journal: :Monthly Notices of the Royal Astronomical Society 2020

Journal: :Atoms 2022

We consider the implications of recent measurement W-boson mass MW=80,433.5±9.4MeV/c2 for atomic parity violation experiments. show that change in MW shifts Standard Model prediction 133Cs nuclear weak charge to QW(133Cs)=?73.11(1), i.e., by 8.5? from its current value, and proton 2.7%. The shift QW(133Cs) ameliorates tension between existing determinations value motivates more accurate theory ...

1989
J. W. Gramlich L. A. Machlan I. L. Barnes P. J. Paulsen

Absolute values have been obtained for the isotopic abundance ratios of a reference sample of nickel (Standard Reference Material 986), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically pure separated nickel isotopes, were used to calibrate the mass spectrometers. The resulting absolute isotopic ratios are: 58Ni/60Ni=2.596061±0....

Journal: :Physical review letters 2004
P Mueller L-B Wang R J Holt Z-T Lu T P O'Connor J P Schiffer

Our knowledge of the possible existence in nature of stable exotic particles depends solely upon experimental observation. Using a sensitive laser spectroscopy technique, we searched for a doubly charged particle accompanied by two electrons as an anomalously heavy isotope of helium in the Earth's atmosphere. The concentration of noble-gas-like atoms in the atmosphere and the subsequent very la...

2009
M. N. Rao L. E. Nyquist D. D. Bogard D. H. Garrison

Introduction: Noble gas measurements in gas-rich impact-melt (GRIM) glasses in EET79001 shergottite showed that their elemental and isotopic composition is similar to that of the Martian atmosphere [1-3]. The GRIM glasses contain large amounts of Martian atmospheric gases. Those measurements further suggested that the Kr isotopic composition of Martian atmosphere is approximately similar to tha...

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