Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1985 1
2004 1
2022 1
2024 0

Text availability

Article attribute

Article type

Publication date

Search Results

3 results

Results by year

Filters applied: . Clear all
Your search was processed without automatic term mapping because it retrieved zero results.
Page 1
High-precision mass measurement of doubly magic 208 Pb.
Kromer K, Lyu C, Door M, Filianin P, Harman Z, Herkenhoff J, Huang W, Keitel CH, Lange D, Novikov YN, Schweiger C, Eliseev S, Blaum K. Kromer K, et al. Eur Phys J A Hadron Nucl. 2022;58(10):202. doi: 10.1140/epja/s10050-022-00860-1. Epub 2022 Oct 25. Eur Phys J A Hadron Nucl. 2022. PMID: 36312005 Free PMC article.
The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7 10-11 by measuring the cyclotron-frequency ratio R of 208 Pb 41+ to 132 Xe 26+ with the high-precision Penning-trap mass spectrometer Pentatrap and computing the binding energies EPb …
The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7 10-11 by measuring the cyclotron-frequency ratio …
Group actions and higher signatures.
Weinberger S. Weinberger S. Proc Natl Acad Sci U S A. 1985 Mar;82(5):1297-8. doi: 10.1073/pnas.82.5.1297. Proc Natl Acad Sci U S A. 1985. PMID: 16593545 Free PMC article.
Let pi be a nontrivial finite group and M be a closed manifold. An interesting question is whether or not M has the R-homology type of a manifold admitting a free pi action. Here this problem is studied for actions that are "homologically trivial." If pi(1)M is nontrivial …
Let pi be a nontrivial finite group and M be a closed manifold. An interesting question is whether or not M has the R-homology type o …
Oscillation of functions with a spectral gap.
Eremenko A, Novikov D. Eremenko A, et al. Proc Natl Acad Sci U S A. 2004 Apr 20;101(16):5872-3. doi: 10.1073/pnas.0302874101. Epub 2004 Apr 12. Proc Natl Acad Sci U S A. 2004. PMID: 15079072 Free PMC article.
Suppose that the Fourier transform of a real measure f on the real line satisfies f(x) = 0 for x in (-a, a). Then, when r --> infinity, the asymptotic lower density of the sequence of sign changes of f on the intervals [0, r) is at least a/pi. ...
Suppose that the Fourier transform of a real measure f on the real line satisfies f(x) = 0 for x in (-a, a). Then, when r --> infi …