Keiichi Yokoyama

2.7k total citations
124 papers, 1.6k citations indexed

About

Keiichi Yokoyama is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Materials Chemistry. According to data from OpenAlex, Keiichi Yokoyama has authored 124 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 80 papers in Atomic and Molecular Physics, and Optics, 32 papers in Spectroscopy and 26 papers in Materials Chemistry. Recurrent topics in Keiichi Yokoyama's work include Advanced Chemical Physics Studies (57 papers), Spectroscopy and Laser Applications (21 papers) and Laser-Matter Interactions and Applications (21 papers). Keiichi Yokoyama is often cited by papers focused on Advanced Chemical Physics Studies (57 papers), Spectroscopy and Laser Applications (21 papers) and Laser-Matter Interactions and Applications (21 papers). Keiichi Yokoyama collaborates with scholars based in Japan, Spain and Germany. Keiichi Yokoyama's co-authors include Yuzuru Kurosaki, Atsushi Yokoyama, Hiroshi Kudo, Akira Ichihara, Hiromasa Tanaka, Takayuki Fueno, Toshiyuki Takayanagi, Hiroshi Akagi, Shigeru Tsunashima and Tsuyoshi Yaita and has published in prestigious journals such as The Journal of Chemical Physics, The Journal of Physical Chemistry B and The Journal of Physical Chemistry.

In The Last Decade

Keiichi Yokoyama

114 papers receiving 1.6k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiichi Yokoyama Japan 24 869 408 406 300 281 124 1.6k
Klaus Lützenkirchen Germany 24 974 1.1× 562 1.4× 446 1.1× 294 1.0× 161 0.6× 62 1.6k
Jeffrey S. Pilgrim United States 19 914 1.1× 427 1.0× 463 1.1× 254 0.8× 250 0.9× 35 1.4k
S. E. Barlow United States 21 779 0.9× 341 0.8× 689 1.7× 104 0.3× 221 0.8× 36 1.5k
Richard J. Wheatley United Kingdom 26 1.3k 1.5× 656 1.6× 524 1.3× 175 0.6× 218 0.8× 94 2.1k
Marta I. Hernández Spain 24 1.1k 1.3× 321 0.8× 485 1.2× 124 0.4× 228 0.8× 105 1.6k
Anant D. Kulkarni India 17 645 0.7× 374 0.9× 310 0.8× 303 1.0× 102 0.4× 29 1.4k
Jeremy M. Merritt United States 19 946 1.1× 304 0.7× 342 0.8× 230 0.8× 100 0.4× 39 1.5k
E.A. Colbourn United Kingdom 24 1.2k 1.4× 746 1.8× 598 1.5× 295 1.0× 306 1.1× 48 2.0k
Fernando R. Ornellas Brazil 26 1.4k 1.6× 570 1.4× 496 1.2× 298 1.0× 461 1.6× 141 2.0k
Konrad Patkowski United States 29 1.7k 2.0× 593 1.5× 572 1.4× 307 1.0× 314 1.1× 57 2.5k

Countries citing papers authored by Keiichi Yokoyama

Since Specialization
Citations

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

Fields of papers citing papers by Keiichi Yokoyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Yokoyama

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Yokoyama. A scholar is included among the top collaborators of Keiichi Yokoyama 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 Keiichi Yokoyama. Keiichi Yokoyama 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.
Nakashima, Nobuaki, Keiichi Yokoyama, Seiji Taniguchi, et al.. (2022). Laser-fluence dependence of resonance-enhanced multiphoton reduction of trivalent europium. Chemical Physics Letters. 802. 139759–139759. 1 indexed citations
2.
Nakashima, Nobuaki, et al.. (2020). An electron-capture efficiency in femtosecond filamentation. Chemical Physics Letters. 752. 137570–137570. 2 indexed citations
3.
Yokoyama, Keiichi, et al.. (2014). Optical Frequency Comb Opens up Highly Efficient Isotope Separation of Long-lived Fission Products. Journal of the Atomic Energy Society of Japan. 56(8). 525–528. 1 indexed citations
4.
Ichihara, Akira, et al.. (2013). An Analytic Formula for Describing the Transient Rotational Dynamics of Diatomic Molecules in an Optical Frequency Comb. Chinese Journal of Physics. 51(6). 1230–1240. 5 indexed citations
5.
Hashimoto, Masashi, et al.. (2012). Construction of narrow-band regenerative amplifier for momentum imaging spectroscopy of lithium dimer. AIP conference proceedings. 58–62.
6.
Kurosaki, Yuzuru & Keiichi Yokoyama. (2012). Ab initio MRSDCI study on the low-lying electronic states of the lithium chloride molecule (LiCl). The Journal of Chemical Physics. 137(6). 64305–64305. 12 indexed citations
7.
Kurosaki, Yuzuru, et al.. (2008). Ab initio study on the ground and low-lying excited states of cesium iodide (CsI). The Journal of Chemical Physics. 128(2). 24301–24301. 19 indexed citations
8.
Akagi, Hiroshi, Keiichi Yokoyama, Atsushi Yokoyama, & Akira Wada. (2005). The 5νNH and 5νND vibrational bands of partially deuterated ammonia species. Journal of Molecular Spectroscopy. 231(1). 37–49.
9.
Kurosaki, Yuzuru, Keiichi Yokoyama, & Yoshiaki Teranishi. (2004). Direct ab initio molecular dynamics study of the two photodissociation channels of formic acid. Chemical Physics. 308(3). 325–334. 23 indexed citations
10.
Akagi, Hiroshi, Keiichi Yokoyama, & Atsushi Yokoyama. (2003). Photodissociation of highly vibrationally excited NH3 in the 5νN–H region: Initial vibrational state dependence of N–H bond dissociation cross section. The Journal of Chemical Physics. 118(8). 3600–3611. 28 indexed citations
11.
Kurosaki, Yuzuru & Keiichi Yokoyama. (2002). Photodissociation of Acetaldehyde, CH3CHO → CH4 + CO:  Direct ab Initio Dynamics Study. The Journal of Physical Chemistry A. 106(47). 11415–11421. 35 indexed citations
12.
Yokoyama, Keiichi, et al.. (2002). Theoretical study on the geometric and electronic structure of the lithium-rich LinFn−1 (n=2–5) clusters. Journal of Molecular Structure THEOCHEM. 577(1). 55–67. 22 indexed citations
13.
Urayama, Kenji, Keiichi Yokoyama, & S. Kohjiya. (2000). Low-temperature behavior of deswollen poly(dimethylsiloxane) networks. Polymer. 41(9). 3273–3278. 26 indexed citations
14.
Yokoyama, Keiichi & Toshiyuki Takayanagi. (1996). Tunneling in the H2S+O(3P)→HS+OH reaction: A theoretical study. The Journal of Chemical Physics. 104(5). 1953–1957. 4 indexed citations
15.
Kobayashi, Hironobu, Toshiyuki Takayanagi, Keiichi Yokoyama, Tohru Sato, & Shigeru Tsunashima. (1995). Quasiclassical trajectory studies of N(2D)+ H2 reaction on a fitted ab initio potential-energy surface. Journal of the Chemical Society Faraday Transactions. 91(21). 3771–3771. 49 indexed citations
16.
Yokoyama, Atsushi, et al.. (1994). Infrared multiphoton dissociation of 2-chloro-1,1,1,2-tetrafluoroethane in a molecular beam. The Journal of Chemical Physics. 100(9). 6487–6491. 21 indexed citations
17.
Akiba, Masato, H. Takatsu, T. Kuroda, et al.. (1991). Development of plasma facing components at JAERI. Fusion Engineering and Design. 18. 99–104. 3 indexed citations
18.
Yokoyama, Keiichi, et al.. (1991). Mechanism of the Reaction of NH(1Δ) with NO in Argon Matrix. Bulletin of the Chemical Society of Japan. 64(6). 1731–1737. 3 indexed citations
19.
Paméla, J., et al.. (1990). Energy recovery experiments with a powerful neutral beam injector equipped with a high atomic ion yield plasma generator. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 294(1-2). 299–312. 6 indexed citations
20.
Wootton, A. J., H.C. Howe, P.H. Edmonds, et al.. (1986). Electrostatic fluctuations and transport in the edge of the ISX-B tokamak. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). 1 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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