D. A. Knapp

2.8k citations

37 papers · 2.4k · h-index 22

Impact in

Radiation top 0.5%
- X-ray Spectroscopy and Fluorescence Analysis
Atomic and Molecular Physics, and Optics top 1%
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies

Papers in

Atomic and Molecular Physics, and Optics 31
- Atomic and Molecular Physics 31
Spectroscopy 18
- Mass Spectrometry Techniques and Applications 18

Co-authors: R. E. Marrs (24 shared papers)J. Henderson (14 shared papers)M. B. Schneider (13 shared papers)M. A. Levine (9 shared papers)Morton A. Levine (7 shared papers)P. Beiersdörfer (16 shared papers)S. R. Elliott (3 shared papers)J. H. Scofield (7 shared papers)
Journals: Physical Review Letters (9 papers)Physical Review A (5 papers)Review of Scientific Instruments (3 papers)Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms (2 papers)Nuclear Science and Engineering (1 paper)
Partner nations: United States France

In The Last Decade

D. A. Knapp

37 papers receiving 2.3k citations

Peers

Countries citing papers authored by D. A. Knapp

Since Specialization

Citations

This map shows the geographic impact of D. A. Knapp's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by D. A. Knapp with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites D. A. Knapp more than expected).

Fields of papers citing papers by D. A. Knapp

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by D. A. Knapp. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by D. A. Knapp. The network helps show where D. A. Knapp may publish in the future.

Co-authors

The 25 scholars most cited alongside D. A. Knapp, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with D. A. Knapp Line = papers co-authored together D. A. Knapp links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

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#	Work
1	The Electron Beam Ion Trap: A New Instrument for Atomic Physics Measurements Physica Scripta ·Morton A. Levine, R. E. Marrs, J. Henderson, D. A. Knapp, M. B. Schneider	1988	397
2	Measurement of electron-impact–excitation cross sections for very highly charged ions Physical Review Letters ·R. E. Marrs, M. A. Levine, D. A. Knapp, J. Henderson	1988	260
3	Production and Trapping of Hydrogenlike and Bare Uranium Ions in an Electron Beam Ion Trap Physical Review Letters ·R. E. Marrs, S. R. Elliott, D. A. Knapp	1994	191
4	The use of an electron beam ion trap in the study of highly charged ions Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ·M. A. Levine, R. E. Marrs, J. N. Bardsley, P. Beiersdörfer, C. L. Bennett, M.H. Chen, T. E. Cowan, D. D. Dietrich, J. Henderson, D. A. Knapp, A. L. Osterheld, B. M. Penetrante, M. B. Schneider, J. H. Scofield	1989	160
5	Description and dosimetric verification of the PEREGRINE Monte Carlo dose calculation system for photon beams incident on a water phantom Medical Physics ·Christine L. Hartmann Siantar, R. S. Walling, T.P. Daly, Bruce Faddegon, Norman Albright, P. M. Bergstrom, Alex F. Bielajew, Cynthia Chuang, D. Garrett, R.K. House, D. A. Knapp, D Jay Wieczorek, Lynn Verhey	2001	148
6	Polarization of x-ray emission lines from heliumlike scandium as a probe of the hyperfine interaction Physical Review Letters ·J. Henderson, P. Beiersdörfer, C. L. Bennett, S. Chantrenne, D. A. Knapp, R. E. Marrs, M. B. Schneider, K. L. Wong, G. A. Doschek, J. F. Seely, C. M. Brown, R. E. LaVilla, J. Dubau, Morton A. Levine	1990	121
7	A high-energy electron beam ion trap for production of high-charge high-Z ions Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ·D. A. Knapp, R. E. Marrs, S. R. Elliott, E. W. Magee, R. Zasadzinski	1993	107
8	Dielectronic recombination of heliumlike nickel Physical Review Letters ·D. A. Knapp, R. E. Marrs, M. A. Levine, C. L. Bennett, M. H. Chen, J. Henderson, M. B. Schneider, J. H. Scofield	1989	107
9	Structure and Lamb shift of 2s1/2-2p3/2levels in lithiumlikeU89+through neonlikeU82+ Physical Review Letters ·P. Beiersdörfer, D. A. Knapp, R. E. Marrs, S. R. Elliott, M. H. Chen	1993	98
10	High-resolution x-ray spectrometer for an electron beam ion trap Review of Scientific Instruments ·P. Beiersdörfer, R. E. Marrs, J. Henderson, D. A. Knapp, M. A. Levine, D. B. Platt, M. B. Schneider, D. A. Vogel, K. L. Wong	1990	95
11	Dielectronic recombination of heliumlike ions Physical Review A ·D. A. Knapp, R. E. Marrs, M. B. Schneider, M. H. Chen, M. A. Levine, P. Lee	1993	85
12	Observation of Interference between Dielectronic Recombination and Radiative Recombination in Highly Charged Uranium Ions Physical Review Letters ·D. A. Knapp, P. Beiersdörfer, M-H. Chen, J. H. Scofield, D. Schneider	1995	83
13	Structure and Lamb shift of 2s1/2-2p3/2levels in lithiumlikeTh87+through neonlikeTh80+ Physical Review A ·P. Beiersdörfer, A. L. Osterheld, S. R. Elliott, M. H. Chen, D. A. Knapp, K. J. Reed	1995	66
14	Indirect x-ray line formation processes in highly charged barium Physical Review Letters ·P. Beiersdörfer, A. L. Osterheld, M. H. Chen, J. Henderson, D. A. Knapp, Morton A. Levine, R. E. Marrs, K. J. Reed, M. B. Schneider, D. A. Vogel	1990	61
15	Precision measurement of the 3s1/2-3p3/2transition energy in Na-like platinum ions Physical Review Letters ·T. E. Cowan, C. L. Bennett, D. D. Dietrich, J. Bixler, Charles J. Hailey, J. Henderson, D. A. Knapp, M. A. Levine, R. E. Marrs, M. B. Schneider	1991	50
16	Evaporative cooling of highly charged dysprosium ions in an enhanced electron-beam ion trap Physical Review A ·B. M. Penetrante, J. N. Bardsley, Morton A. Levine, D. A. Knapp, R. E. Marrs	1991	48
17	Evidence for internal dielectronic excitation of slow highly charged uranium ions Physical Review Letters ·R. Schuch, Dieter Schneider, D. A. Knapp, D. R. DeWitt, J. McDonald, M.H. Chen, M. W. Clark, R. E. Marrs	1993	46
18	Precision measurement of theKα transitions in heliumlikeGe30+ Physical Review A ·S. A. MacLaren, P. Beiersdörfer, D. A. Vogel, D. A. Knapp, R. E. Marrs, K. L. Wong, R. Zasadzinski	1992	40
19	Studies of He-like krypton for use in determining electron and ion temperatures in very-high-temperature plasmas Review of Scientific Instruments ·K. Widmann, P. Beiersdörfer, V. Decaux, S. R. Elliott, D. A. Knapp, A. L. Osterheld, M. Bitter, A. J. Smith	1995	36
20	Measurement of theLMMdielectronic recombination resonances of neonlike gold Physical Review A ·M. B. Schneider, D. A. Knapp, M-H. Chen, J. H. Scofield, P. Beiersdörfer, C. L. Bennett, J. Henderson, M. A. Levine, R. E. Marrs	1992	36

About D. A. Knapp

D. A. Knapp is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy, Radiation, Mechanics of Materials and Nuclear and High Energy Physics, having authored 37 papers that have together received 2.4k indexed citations. Recurring topics across this work include Atomic and Molecular Physics (31 papers), Mass Spectrometry Techniques and Applications (18 papers), X-ray Spectroscopy and Fluorescence Analysis (12 papers), Laser-induced spectroscopy and plasma (10 papers), Electron and X-Ray Spectroscopy Techniques (5 papers), Nuclear physics research studies (4 papers), Ion-surface interactions and analysis (3 papers) and Radiation Therapy and Dosimetry (2 papers). The work is most often cited by research in Radiation (785 citations), Atomic and Molecular Physics, and Optics (2.1k citations), Spectroscopy (1.0k citations), Mechanics of Materials (853 citations) and Nuclear and High Energy Physics (309 citations). D. A. Knapp has collaborated with scholars based in United States and France. Frequent co-authors include R. E. Marrs, J. Henderson, M. B. Schneider, M. A. Levine, Morton A. Levine, P. Beiersdörfer, S. R. Elliott, J. H. Scofield, C. L. Bennett and S. R. Elliott. Their work appears in journals such as Physical Review Letters, Physical Review A, Review of Scientific Instruments, Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms and Nuclear Science and Engineering.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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