R. Engfer

4.1k citations

53 papers · 2.5k · 2 hit papers · h-index 24

Impact in

Nuclear and High Energy Physics top 1%
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
Radiation top 1%
- Nuclear Physics and Applications

Papers in

Nuclear and High Energy Physics 35
- Nuclear physics research studies 21
- Particle physics theoretical and experimental studies 14
- Quantum Chromodynamics and Particle Interactions 14
- High-Energy Particle Collisions Research 6
Atomic and Molecular Physics, and Optics 22
- Atomic and Molecular Physics 21

Co-authors: H.K. Walter (32 shared papers)E.A. Hermes (18 shared papers)A. van der Schaaf (11 shared papers)H. Schneuwly (13 shared papers)A. Zehnder (10 shared papers)J.L. Vuilleumier (6 shared papers)G. Otter (7 shared papers)T. Kozłowski (11 shared papers)
Journals: Nuclear Physics A (20 papers)Physics Letters B (13 papers)The European Physical Journal A (5 papers)Nuclear Physics B (2 papers)Annual Review of Nuclear and Particle Science (1 paper)
Partner nations: Switzerland Germany Netherlands

In The Last Decade

R. Engfer

53 papers receiving 2.4k citations

R. Engfer's Hit Papers

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A search for μ-e conversion in muonic gold 2006 · 440 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2006 The European Physical Journal C
1988 Nuclear Physics B

Peers

Countries citing papers authored by R. Engfer

Since Specialization

Citations

This map shows the geographic impact of R. Engfer'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 R. Engfer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R. Engfer more than expected).

Fields of papers citing papers by R. Engfer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by R. Engfer. 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 R. Engfer. The network helps show where R. Engfer may publish in the future.

Co-authors

The 25 scholars most cited alongside R. Engfer, 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 R. Engfer Line = papers co-authored together R. Engfer links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 53 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Search for the decay μ+ → e+e+e− Nuclear Physics B ·U. Bellgardt, G. Otter, R. Eichler, L. Felawka, C. Niebuhr, H. K. Walter, W. Bertl, N. Lordong, J. Martino, S. Egli, R. Engfer, C. Grab, M. Grossmann-Handschin, E.A. Hermes, N. Kraus, F. Muheim, H.S. Pruys, A. van der Schaaf, D. Vermeulen Hit paper breakdown →	1988	461
2	A search for μ-e conversion in muonic gold The European Physical Journal C ·W. Bertl, R. Engfer, E.A. Hermes, G. Kurz, T. Kozłowski, J. Kuth, G. Otter, F. Rosenbaum, N.M. Ryskulov, A. van der Schaaf, P. Wintz, I. Zychor Hit paper breakdown →	2006	440
3	Charge-distribution parameters, isotope shifts, isomer shifts, and magnetic hyperfine constants from muonic atoms Atomic Data and Nuclear Data Tables ·R. Engfer, H. Schneuwly, J.L. Vuilleumier, H.K. Walter, A. Zehnder	1974	282
4	Search for the decay μ+ → e+e+e− Nuclear Physics B ·W. Bertl, S. Egli, R. Eichler, R. Engfer, L. Felawka, C. Grab, (unknown), N. Kraus, N. Lordong, J. Martino, (unknown), (unknown), M. Grossmann-Handschin	1985	120
5	Improved Limit on the Branching Ratio ofμ→eConversion on Lead Physical Review Letters ·W. Honecker, C. Dohmen, H. Haan, D. Junker, G. Otter, M. Starlinger, P. Wintz, Julia Hofmann, W. Bertl, J. Egger, B. Krause, S. Eggli, R. Engfer, C. Findeisen, E.A. Hermes, T. Kozłowski, C. Niebuhr, H.S. Pruys, A. van der Schaaf	1996	100
6	Study of X-rays and nuclear γ-rays in muonic thallium Nuclear Physics A ·H. Backe, R. Engfer, U. Jahnke, E. Kankeleit, R.M. Pearce, C. Petitjean, L. Schellenberg, H. Schneuwly, W. U. Schröder, H.K. Walter, A. Zehnder	1972	79
7	Nuclear excitation and isomer shifts in muonic atoms Nuclear Physics A ·H. Backe, R. Engfer, E. Kankeleit, R. Link, R. Michaelsen, C. Petitjean, L. Schellenberg, H. Schneuwly, W. U. Schröder, J.L. Vuilleumier, H.K. Walter, A. Zehnder	1974	65
8	Limits for short-lived neutral particles emitted in μ+ or π+ decay Physics Letters B ·R. Eichler, L. Felawka, N. Kraus, C. Niebuhr, H.K. Walter, S. Egli, R. Engfer, C. Grab, E.A. Hermes, H.S. Pruys, A. van der Schaaf, D. Vermeulen, W. Bertl, N. Lordong, U. Bellgardt, G. Otter, T. Kozłowski, J. Martino	1986	54
9	Test of quantum-electrodynamical corrections in muonic atoms Physics Letters B ·H.K. Walter, J.H. Vuilleumier, H. Backe, F. Boehm, R. Engfer, A.H.v. Gunten, R. Link, R. Michaelsen, C. Petitjean, L. Schellenberg, H. Schneuwly, W. U. Schröder, A. Zehnder	1972	45
10	Measurement of the decay π+→e+νee+e− and search for a light Higgs boson Physics Letters B ·S. Egli, R. Engfer, C. Grab, E.A. Hermes, N. Kraus, H.S. Pruys, A. van der Schaaf, R. Eichler, T. Kozłowski, C. Niebuhr, H. K. Walter, W. Bertl, N. Lordong, D. Vermeulen, U. Bellgardt, G. Otter	1989	41
11	Absorption of stopped π− in 59Co, 75As, 197Au and 209Bi investigated by in-beam and activation γ-ray spectroscopy Nuclear Physics A ·H.S. Pruys, R. Engfer, Robert Hartmann, U. Sennhauser, H.-J. Pfeiffer, H.K. Walter, J. Morgenstern, A. Wytténbach, E. Gadioli, E. Gadioli-Erba	1979	36
12	Study of mu-mesonic X-rays: Elements from sulphur to molybdenum Nuclear Physics ·D. Quitmann, R. Engfer, U. Hegel, Peter Brix, G. Backenstoss, K. Goebel, Brigitte Städler	1964	36
13	Charged particle emission following the absorption of stopped π− in 12C, 59Co and 197Au Nuclear Physics A ·H.S. Pruys, R. Engfer, Robert Hartmann, E.A. Hermes, H.P. Isaak, F. Schlepuetz, U. Sennhauser, W. Dey, Kenneth R. Hess, H.-J. Pfeiffer, H.K. Walter, W.H.A. Hesselink	1981	36
14	Elastic electron scattering experiments on Be and C at 53 MeV and their analysis using an improved phase-shift method Nuclear Physics A ·Hans Alfred Bentz, R. Engfer, Wolfgang Bühring	1967	34
15	Charge parameters, isotope shifts, quadrupole moments, and nuclear excitation in muonic 170–174,176Yb Nuclear Physics A ·A. Zehnder, F. Boehm, W. Dey, R. Engfer, H.K. Walter, J.L. Vuilleumier	1975	33
16	A new upper limit for the decay μ+ → e+γ Physics Letters B ·H.P. Povel, W. Dey, H.K. Walter, H.-J. Pfeiffer, U. Sennhauser, J. Egger, H.-J. Gerber, Michael Salzmann, A. van der Schaaf, W. Eichenberger, R. Engfer, E.A. Hermes, F. W. Schlepütz, U. Weidmann, C. Petitjean, W.H.A. Hesselink	1977	33
17	Muonic isomer shift measurements in Sm, W and Os isotopes and their interpretation in terms of changes in nuclear charge distribution Physics Letters B ·R. Baader, H. Backe, R. Engfer, K. Hesse, E. Kankeleit, Uwe Schröder, H.K. Walter, K. Wien	1968	32
18	Spectroscopy of single and correlated neutrons following pion absorption in 12C, 59Co and 197Au Nuclear Physics A ·Robert Hartmann, H.P. Isaak, R. Engfer, E.A. Hermes, H.S. Pruys, W. Dey, H.-J. Pfeiffer, U. Sennhauser, H.K. Walter, J. Morgenstern	1978	32
19	First observation of the decay π+ → e+νe+e− and a determination of the form factors FV, FA, R Physics Letters B ·S. Egli, R. Engfer, C. Grab, E.A. Hermes, H.S. Pruys, A. van der Schaaf, D. Vermeulen, R. Eichler, N. Kraus, C. Niebuhr, H. K. Walter, W. Bertl, N. Lordong, U. Bellgardt, G. Otter, T. Kozłowski	1986	32
20	Muon capture in 151Eu and 153Eu Nuclear Physics A ·C. Petitjean, H. Backe, R. Engfer, U. Jahnke, K. H. Lindenberger, H. Schneuwly, W. U. Schröder, H.K. Walter	1971	29

About R. Engfer

R. Engfer is a scholar working on Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics, Mechanics of Materials, Radiation and Condensed Matter Physics, having authored 53 papers that have together received 2.5k indexed citations. Recurring topics across this work include Muon and positron interactions and applications (21 papers), Atomic and Molecular Physics (21 papers), Nuclear physics research studies (21 papers), Particle physics theoretical and experimental studies (14 papers), Quantum Chromodynamics and Particle Interactions (14 papers), Nuclear Physics and Applications (11 papers), X-ray Spectroscopy and Fluorescence Analysis (9 papers) and High-Energy Particle Collisions Research (6 papers). The work is most often cited by research in Nuclear and High Energy Physics (2.1k citations), Radiation (541 citations), Atomic and Molecular Physics, and Optics (673 citations), Mechanics of Materials (307 citations) and Astronomy and Astrophysics (148 citations). R. Engfer has collaborated with scholars based in Switzerland, Germany and Netherlands. Frequent co-authors include H.K. Walter, E.A. Hermes, A. van der Schaaf, H. Schneuwly, A. Zehnder, J.L. Vuilleumier, G. Otter, T. Kozłowski, H.S. Pruys and W. Bertl. Their work appears in journals such as Nuclear Physics A, Physics Letters B, The European Physical Journal A, Nuclear Physics B and Annual Review of Nuclear and Particle Science.

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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