R.G. Helmer

6.8k citations

141 papers · 5.5k · 1 hit paper · h-index 36

Impact in

Radiation top 0.05%
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Detection and Scintillator Technologies
Nuclear and High Energy Physics top 0.5%
- Nuclear physics research studies
- Astronomical and nuclear sciences

Papers in

Radiation 96
- Nuclear Physics and Applications 83
- Radioactive Decay and Measurement Techniques 42
- X-ray Spectroscopy and Fluorescence Analysis 33
- Radiation Detection and Scintillator Technologies 16
Nuclear and High Energy Physics 70
- Nuclear physics research studies 61
- Quantum Chromodynamics and Particle Interactions 16
- Particle physics theoretical and experimental studies 14

Co-authors: R. C. Greenwood (27 shared papers)R.J. Gehrke (29 shared papers)K. Debertin (1 shared paper)C.W. Reich (27 shared papers)Michel Meybeck (3 shared papers)Ivanildo Hespanhol (3 shared papers)C. van der Leun (3 shared papers)M.H. Putnam (9 shared papers)
Journals: Nuclear Data Sheets (20 papers)Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (16 papers)Nuclear Physics A (10 papers)Nuclear Technology (3 papers)Applied Radiation and Isotopes (3 papers)
Partner nations: United States Switzerland France

In The Last Decade

R.G. Helmer

138 papers receiving 5.1k citations

R.G. Helmer's Hit Papers

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Gamma- and X-Ray Spectrometry with Semiconductor Detectors 1988 · 665 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.

1988 CERN Document Server (European Organization for Nuclear Research)

Peers

Countries citing papers authored by R.G. Helmer

Since Specialization

Citations

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

Fields of papers citing papers by R.G. Helmer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside R.G. Helmer, 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.G. Helmer Line = papers co-authored together R.G. Helmer 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 141 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Gamma- and X-Ray Spectrometry with Semiconductor Detectors CERN Document Server (European Organization for Nuclear Research) ·K. Debertin, R.G. Helmer Hit paper breakdown →	1988	665
2	The quality of rivers: From pristine stage to global pollution Palaeogeography Palaeoclimatology Palaeoecology ·Michel Meybeck, R.G. Helmer	1989	379
3	Water Pollution Control: A Guide to the Use of Water Quality Management Principles R.G. Helmer, Ivanildo Hespanhol	1998	316
4	Precise comparison and measurement of gamma-ray energies with a Ge(Li) detector II. 400–1300 keV Nuclear Instruments and Methods ·R.G. Helmer, R. C. Greenwood, R.J. Gehrke	1971	197
5	Precise relative γ-ray intensities for calibration of Ge semiconductor detectors Nuclear Instruments and Methods ·R.J. Gehrke, R.G. Helmer, R. C. Greenwood	1977	176
6	Precise comparison and measurement of gamma-ray energies with a Ge(Li) detector I. 50–420 keV Nuclear Instruments and Methods ·R. C. Greenwood, R.G. Helmer, R.J. Gehrke	1970	161
7	New Half-Life Measurement ofHf182: Improved Chronometer for the Early Solar System Physical Review Letters ·Christof Vockenhuber, Felix Oberli, M. Bichler, I. Ahmad, G. Quitté, M. M. M. Meier, Alex N. Halliday, D.-C. Lee, W. Kutschera, Peter Steier, R.J. Gehrke, R.G. Helmer	2004	151
8	An excited state ofTh229at 3.5 eV Physical Review C ·R.G. Helmer, C.W. Reich	1994	142
9	Recommended standards for γ-ray energy calibration (1999) Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ·R.G. Helmer, C. van der Leun	2000	140
10	The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ·R.G. Helmer, J. C. Hardy, V. E. Iacob, M. Sanchez‐Vega, R. G. Neilson, JW Nelson	2003	127
11	Reevaluation of precise γ-ray energies for calibration of Ge(Li) spectrometers Nuclear Instruments and Methods ·R.G. Helmer, R. C. Greenwood, R.J. Gehrke	1978	126
12	Global freshwater quality : a first assessment Blackwell eBooks ·Michel Meybeck, Deborah V. Chapman, R.G. Helmer	1989	105
13	Photopeak analysis program for photon energy and intensity determinations Nuclear Instruments and Methods ·R.G. Helmer, Robert L. Heath, M.H. Putnam, D.H. Gipson	1967	104
14	Recommended standards for gamma-ray energy calibration (1979) Atomic Data and Nuclear Data Tables ·R.G. Helmer, P.H.M. Van Assche, C. van der Leun	1979	102
15	Precise efficiency calibration of an HPGe detector: source measurements and Monte Carlo calculations with sub-percent precision Applied Radiation and Isotopes ·J. C. Hardy, V. E. Iacob, M. Sanchez‐Vega, Robert Effinger, P. Lipnik, V. E. Mayes, Dianea Willis, R.G. Helmer	2002	96
16	Energy separation of the doublet of intrinsic states at the ground state ofTh229 Physical Review Letters ·C.W. Reich, R.G. Helmer	1990	96
17	Precise γ-ray energies for calibration of Ge semiconductor spectrometers to 3.5 MeV Nuclear Instruments and Methods ·R. C. Greenwood, R.G. Helmer, R.J. Gehrke	1979	95
18	Measurement of β−-decay intensity distributions of several fission-product isotopes using a total absorption γ-ray spectrometer Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment ·R. C. Greenwood, R.G. Helmer, M.H. Putnam, K.D. Watts	1997	87
19	Decay of an isomeric state in 178Hf with Nuclear Physics A ·R.G. Helmer, C.W. Reich	1968	79
20	Precise efficiency calibration of an HPGe detector up to 3.5MeV, with measurements and Monte Carlo calculations Applied Radiation and Isotopes ·R.G. Helmer, N. Nica, J. C. Hardy, V. E. Iacob	2003	71

About R.G. Helmer

R.G. Helmer is a scholar working on Radiation, Nuclear and High Energy Physics, Radiological and Ultrasound Technology, Atomic and Molecular Physics, and Optics and Materials Chemistry, having authored 141 papers that have together received 5.5k indexed citations. Recurring topics across this work include Nuclear Physics and Applications (83 papers), Nuclear physics research studies (61 papers), Radioactive Decay and Measurement Techniques (42 papers), X-ray Spectroscopy and Fluorescence Analysis (33 papers), Radioactivity and Radon Measurements (24 papers), Radiation Detection and Scintillator Technologies (16 papers), Quantum Chromodynamics and Particle Interactions (16 papers) and Particle physics theoretical and experimental studies (14 papers). The work is most often cited by research in Radiation (3.0k citations), Nuclear and High Energy Physics (2.3k citations), Radiological and Ultrasound Technology (832 citations), Geochemistry and Petrology (218 citations) and Atomic and Molecular Physics, and Optics (1.0k citations). R.G. Helmer has collaborated with scholars based in United States, Switzerland and France. Frequent co-authors include R. C. Greenwood, R.J. Gehrke, K. Debertin, C.W. Reich, Michel Meybeck, Ivanildo Hespanhol, C. van der Leun, M.H. Putnam, J. C. Hardy and Robert L. Heath. Their work appears in journals such as Nuclear Data Sheets, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, Nuclear Physics A, Nuclear Technology and Applied Radiation and Isotopes.

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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