Masamitsu Hirai

1.3k total citations
84 papers, 1.1k citations indexed

About

Masamitsu Hirai is a scholar working on Materials Chemistry, Atomic and Molecular Physics, and Optics and Electrical and Electronic Engineering. According to data from OpenAlex, Masamitsu Hirai has authored 84 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 52 papers in Materials Chemistry, 48 papers in Atomic and Molecular Physics, and Optics and 25 papers in Electrical and Electronic Engineering. Recurrent topics in Masamitsu Hirai's work include Luminescence Properties of Advanced Materials (30 papers), Solid-state spectroscopy and crystallography (22 papers) and Semiconductor Quantum Structures and Devices (15 papers). Masamitsu Hirai is often cited by papers focused on Luminescence Properties of Advanced Materials (30 papers), Solid-state spectroscopy and crystallography (22 papers) and Semiconductor Quantum Structures and Devices (15 papers). Masamitsu Hirai collaborates with scholars based in Japan, United States and Germany. Masamitsu Hirai's co-authors include Masayasu Ueta, Yasuhiro Kondo, T. Karasawa, Mikihiko Ikezawa, Arao Nakamura, Keiichi Edamatsu, Allen B. Scott, Tomochika Matsuyama, Seiichi Tagawa and Yasunori Tokuda and has published in prestigious journals such as Physical Review Letters, The Journal of Chemical Physics and Physical review. B, Condensed matter.

In The Last Decade

Masamitsu Hirai

84 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Masamitsu Hirai Japan 18 646 572 405 113 98 84 1.1k
Herbert Rabin United States 16 392 0.6× 420 0.7× 225 0.6× 107 0.9× 60 0.6× 30 789
Ferd E. Williams United States 21 934 1.4× 598 1.0× 684 1.7× 91 0.8× 63 0.6× 40 1.4k
Kenneth J. Teegarden United States 17 836 1.3× 820 1.4× 520 1.3× 166 1.5× 49 0.5× 37 1.5k
U. M. Grassano Italy 16 582 0.9× 439 0.8× 316 0.8× 134 1.2× 43 0.4× 105 928
Tetsuhiko Tomiki Japan 22 906 1.4× 504 0.9× 437 1.1× 124 1.1× 38 0.4× 54 1.2k
W. M. Yen United States 18 772 1.2× 606 1.1× 388 1.0× 159 1.4× 81 0.8× 63 1.2k
F. Varsanyi United States 12 414 0.6× 319 0.6× 208 0.5× 78 0.7× 57 0.6× 20 691
Toru Miyakawa India 12 1.0k 1.6× 510 0.9× 700 1.7× 64 0.6× 45 0.5× 54 1.4k
Richard Scheps United States 19 545 0.8× 939 1.6× 874 2.2× 78 0.7× 95 1.0× 70 1.6k
W. von der Osten Germany 19 536 0.8× 1.1k 1.8× 487 1.2× 45 0.4× 34 0.3× 109 1.4k

Countries citing papers authored by Masamitsu Hirai

Since Specialization
Citations

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

Fields of papers citing papers by Masamitsu Hirai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masamitsu Hirai

This figure shows the co-authorship network connecting the top 25 collaborators of Masamitsu Hirai. A scholar is included among the top collaborators of Masamitsu Hirai 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 Masamitsu Hirai. Masamitsu Hirai 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.
Edamatsu, Keiichi, et al.. (1995). Infrared transient absorption and electronic state of localized self-trapped excitons in KCl:I. Physical review. B, Condensed matter. 52(11). 7779–7782. 3 indexed citations
2.
Hirai, Masamitsu. (1990). Formation of color centers in anion-doped crystals. Journal of Physics and Chemistry of Solids. 51(7). 737–745. 9 indexed citations
3.
Mito, Kazuyuki & Masamitsu Hirai. (1987). F Center Formation by Photoconversion in KCI Crystals Containing S-Ions. Journal of the Physical Society of Japan. 56(5). 1874–1880. 2 indexed citations
4.
Kondo, Yasuhiro, et al.. (1987). Hot luminescence and non-radiative transition of F centers in KCl and NaCl crystals. Journal of Luminescence. 38(1-6). 164–167. 17 indexed citations
5.
Nakamura, Arao, Masahiko Shimura, Masamitsu Hirai, M. Aihara, & S. Nakashima. (1987). Transient behavior of the second-order optical process in Cd_{x}Zn_{1-x}Te: Transformation from luminescence into Raman scattering. Physical review. B, Condensed matter. 35(3). 1281–1287. 17 indexed citations
6.
Hirai, Masamitsu, et al.. (1987). Photo-induced absorption chance in a-AS2S3 films at 80K. Journal of Non-Crystalline Solids. 95-96. 757–764. 11 indexed citations
7.
Hoshi, Hideo, et al.. (1987). UV absorption shape between 3.5eV and 5.6eV in very thin a-As2S3 films at 80K. Journal of Non-Crystalline Solids. 95-96. 749–755. 1 indexed citations
8.
Hirai, Masamitsu, et al.. (1987). Picosecond Laserphotolysis on Photo-Induced Defect Formation Process in KI Crystal. Journal of the Physical Society of Japan. 56(8). 2948–2963. 14 indexed citations
9.
Nakamura, Arao, Takashi Sano, Yasuhiro Kondo, & Masamitsu Hirai. (1987). Polarization Correlation of Resonant Secondary Emission from the F Center in KCl: Picosecond Time-Resolved Spectroscopy. Journal of the Physical Society of Japan. 56(4). 1603–1608. 12 indexed citations
10.
Nakamura, Arao, K. Fujiwara, Yasunori Tokuda, Tsuneyoshi Nakayama, & Masamitsu Hirai. (1986). Dynamics of photoexcited carriers sinking into an enlarged well in a GaAs/AlAs short-period superlattice. Physical review. B, Condensed matter. 34(12). 9019–9022. 23 indexed citations
11.
Fujiwara, K., Arao Nakamura, Yasunori Tokuda, Takashi Nakayama, & Masamitsu Hirai. (1986). Improved recombination lifetime of photoexcited carriers in GaAs single quantum well heterostructures confined by GaAs/AlAs short-period superlattices. Applied Physics Letters. 49(18). 1193–1195. 23 indexed citations
12.
Kitazawa, H., I. Oguro, Masamitsu Hirai, et al.. (1985). Super dense Kondo states in CeSb and CeBi. Journal of Magnetism and Magnetic Materials. 47-48. 532–535. 15 indexed citations
13.
Nakamura, Arao, Masahiko Shimura, Masamitsu Hirai, & Satοru Nakashima. (1985). DYNAMICS OF LOCALIZED EXCITONS IN MIXED SEMICONDUCTING CRYSTALS. Le Journal de Physique Colloques. 46(C7). C7–179. 1 indexed citations
14.
Hirai, Masamitsu, et al.. (1978). Luminescence and Color Center Foramation by the Optical Conversion of STE in KBr and NaCl. Journal of the Physical Society of Japan. 45(6). 1926–1932. 15 indexed citations
15.
Hirai, Masamitsu, et al.. (1977). Formation of Self Trapped Excitons and F Centers in Picosecond Range in KI Crystals. Journal of the Physical Society of Japan. 43(5). 1679–1685. 26 indexed citations
16.
Maki, Makoto, N. Nagasawa, & Masamitsu Hirai. (1975). Effect of Br− ions on the F-center formation in KCl crystals under u.v. light irradiation. Solid State Communications. 17(11). 1409–1413. 11 indexed citations
17.
Hirai, Masamitsu & Tomochika Matsuyama. (1967). Thermal Conversions of F\(\rightleftarrows\)M in Additively Colored KCl Crystals. Journal of the Physical Society of Japan. 22(4). 1005–1015. 8 indexed citations
18.
Hirai, Masamitsu & Masayasu Ueta. (1962). F'-type New Bands Associated with R, M and N Centers in Alkali Halide Crystals. Journal of the Physical Society of Japan. 17(4). 724–724. 5 indexed citations
19.
Ueta, Masayasu, Masamitsu Hirai, & Mikihiko Ikezawa. (1961). Interaction of Exciton with Electron Trapping Centers in Alkali Halide Crystals. 3. Exciton Induced Photoconductivity of U center. Journal of the Physical Society of Japan. 16(3). 538–546. 7 indexed citations
20.
Ueta, Masayasu & Masamitsu Hirai. (1959). Interaction of Exciton with R Center in KCl Crystal. Journal of the Physical Society of Japan. 14(4). 546–546. 3 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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