O. Sima

1.8k total citations
69 papers, 1.2k citations indexed

About

O. Sima is a scholar working on Radiation, Radiological and Ultrasound Technology and Materials Chemistry. According to data from OpenAlex, O. Sima has authored 69 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 58 papers in Radiation, 53 papers in Radiological and Ultrasound Technology and 27 papers in Materials Chemistry. Recurrent topics in O. Sima's work include Radioactivity and Radon Measurements (53 papers), Nuclear Physics and Applications (49 papers) and Radiation Detection and Scintillator Technologies (28 papers). O. Sima is often cited by papers focused on Radioactivity and Radon Measurements (53 papers), Nuclear Physics and Applications (49 papers) and Radiation Detection and Scintillator Technologies (28 papers). O. Sima collaborates with scholars based in Romania, Germany and France. O. Sima's co-authors include D. Arnold, C. Dovlete, Marie‐Christine Lépy, T. Vidmar, I. Osvath, H. Neder, F. De Corte, M. Korun, F. Bronson and M. Hult and has published in prestigious journals such as Environment International, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment and Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms.

In The Last Decade

O. Sima

66 papers receiving 1.2k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
O. Sima Romania 19 981 833 309 163 114 69 1.2k
D. Arnold Germany 18 872 0.9× 710 0.9× 225 0.7× 202 1.2× 212 1.9× 64 1.2k
M. Korun Slovenia 14 507 0.5× 475 0.6× 150 0.5× 134 0.8× 70 0.6× 90 699
Marie‐Christine Lépy France 21 1.2k 1.2× 461 0.6× 317 1.0× 128 0.8× 156 1.4× 108 1.4k
G. Espinosa Mexico 14 370 0.4× 394 0.5× 169 0.5× 137 0.8× 104 0.9× 134 814
L. Sajó-Bohus Venezuela 16 473 0.5× 293 0.4× 128 0.4× 96 0.6× 89 0.8× 114 837
L. Tommasino Italy 19 840 0.9× 672 0.8× 187 0.6× 166 1.0× 78 0.7× 100 1.4k
K. Debertin Germany 16 1.3k 1.3× 810 1.0× 291 0.9× 176 1.1× 423 3.7× 46 1.6k
M. Jurado Vargas Spain 15 431 0.4× 410 0.5× 143 0.5× 196 1.2× 69 0.6× 62 687
H.A. Khan Pakistan 16 456 0.5× 222 0.3× 171 0.6× 82 0.5× 126 1.1× 111 888
Gordon R. Gilmore United Kingdom 7 413 0.4× 351 0.4× 141 0.5× 145 0.9× 81 0.7× 15 831

Countries citing papers authored by O. Sima

Since Specialization
Citations

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

Fields of papers citing papers by O. Sima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of O. Sima

This figure shows the co-authorship network connecting the top 25 collaborators of O. Sima. A scholar is included among the top collaborators of O. Sima based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with O. Sima. O. Sima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sima, O., et al.. (2025). Pb-210 in volume samples: self-attenuation and scattering problems. Applied Radiation and Isotopes. 226. 112165–112165.
2.
Sima, O., et al.. (2023). Distribution of 222 Rn decay products in a soil sample. Physica Scripta. 98(3). 35009–35009. 4 indexed citations
3.
Kang, Donghwa, J. C. Arteaga-Velázquez, М. Бертаина, et al.. (2023). Latest Analysis Results from the KASCADE-Grande Data. arXiv (Cornell University). 307–307. 3 indexed citations
4.
Dovlete, C., et al.. (2021). Long term 7Be deposition in Romania. Journal of Environmental Radioactivity. 240. 106738–106738.
5.
Sima, O.. (2017). On homogeneity approximation in calibration of gamma-spectrometry assessment of bulk samples. Applied Radiation and Isotopes. 134. 137–141. 2 indexed citations
6.
Sima, O., et al.. (2015). Uncertainty assessment in the free release measurement by gamma spectrometry of rotating waste drums. Applied Radiation and Isotopes. 109. 526–531. 2 indexed citations
7.
Vidmar, T., Santiago Hurtado, Marie‐Christine Lépy, et al.. (2015). Equivalence of computer codes for calculation of coincidence summing correction factors – Part II. Applied Radiation and Isotopes. 109. 482–486. 14 indexed citations
8.
Ott, Oliver J., O. Sima, & Qi Zhao. (2013). Distribution of the 222Rn decay products from a 226Ra solution in a PTB ampoule – Implications for calibration. Applied Radiation and Isotopes. 87. 365–371. 8 indexed citations
9.
Sima, O. & I. Osvath. (2013). Calibration of a low-level anti-Compton underground gamma-spectrometer by experiment and Monte Carlo. Applied Radiation and Isotopes. 81. 109–113. 9 indexed citations
10.
Sima, O., et al.. (2013). Improved method for the assessment of 60Co and 134Cs point sources in samples with non-homogeneous matrix. Applied Radiation and Isotopes. 87. 384–386. 3 indexed citations
11.
Osvath, I., et al.. (2013). Improving the assessment of activity in samples with non-uniform distribution using the sum peak count rate. Applied Radiation and Isotopes. 81. 76–80. 5 indexed citations
12.
Sima, O. & D. Arnold. (2012). Precise measurement and calculation of coincidence summing corrections for point and linear sources. Applied Radiation and Isotopes. 70(9). 2107–2111. 14 indexed citations
13.
Sima, O., et al.. (2012). The examination of source distribution in a large sample by Monte Carlo simulation. Applied Radiation and Isotopes. 70(9). 2141–2143. 4 indexed citations
14.
Ott, Oliver J., Karsten Kossert, & O. Sima. (2012). Photon emission probabilities of 176Lu. Applied Radiation and Isotopes. 70(9). 1886–1891. 7 indexed citations
15.
Vidmar, T., Necati Çeli̇k, N. Cornejo Díaz, et al.. (2009). Testing efficiency transfer codes for equivalence. Applied Radiation and Isotopes. 68(2). 355–359. 52 indexed citations
16.
Sima, O. & D. Arnold. (2009). On the Monte Carlo simulation of HPGe gamma-spectrometry systems. Applied Radiation and Isotopes. 67(5). 701–705. 40 indexed citations
17.
Sima, O., et al.. (2004). Efficiency calibration of high volume samples using the GESPECOR software. Applied Radiation and Isotopes. 61(2-3). 123–127. 20 indexed citations
18.
Arnold, D., S. Neumaier, & O. Sima. (2002). Deep underground gamma spectrometric measurement of 26Al in meteorite samples. Applied Radiation and Isotopes. 56(1-2). 405–408. 12 indexed citations
19.
Lépy, Marie‐Christine, T. Altzitzoglou, D. Arnold, et al.. (2001). Intercomparison of efficiency transfer software for gamma-ray spectrometry. Applied Radiation and Isotopes. 55(4). 493–503. 100 indexed citations
20.
Sima, O., et al.. (2001). Analysis of Thorium and its Progeny by Gamma Ray Sepctrometry and Alpha Track Methods. Radiation Protection Dosimetry. 97(2). 181–186. 2 indexed citations

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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