H. A. Klein

1.5k citations

48 papers · 944 indexed · h-index 16

Impact in

Atomic and Molecular Physics, and Optics top 2%
- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Laser Technologies
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Advanced Chemical Physics Studies
Statistics, Probability and Uncertainty top 1%
- Scientific Measurement and Uncertainty Evaluation

Papers in

Statistics, Probability and Uncertainty 12
- Scientific Measurement and Uncertainty Evaluation 12
Atomic and Molecular Physics, and Optics 45
- Advanced Frequency and Time Standards 32
- Cold Atom Physics and Bose-Einstein Condensates 22
- Advanced Fiber Laser Technologies 13
- Atomic and Molecular Physics 12
- Atomic and Subatomic Physics Research 9
- Advanced Chemical Physics Studies 4

Co-authors: P. Gill Guozheng Huang G. P. Barwood H. S. Margolis W. R. C. Rowley S.N. Lea K. Szymaniec M. W. Roberts
Journals: Physical Review A (5 papers)Physical Review Letters (4 papers)IEEE Transactions on Instrumentation and Measurement (3 papers)Measurement Science and Technology (3 papers)Review of Scientific Instruments (2 papers)
Partner nations: United Kingdom Germany China

In The Last Decade

H. A. Klein

43 papers receiving 881 citations

Peers

Countries citing papers authored by H. A. Klein

Since Specialization

Citations

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

Fields of papers citing papers by H. A. Klein

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by H. A. Klein. 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 H. A. Klein. The network helps show where H. A. Klein may publish in the future.

Co-authorship network

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

All Works

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20 of 20 papers shown

#	Work
1	An ion trap design for a space-deployable strontium-ion optical clock Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences ·Eva Meakin, S. Alrefai, Kerrich Robert, Billy Robertson, H. A. Klein, RamanPushkala, G. P. Barwood, P. Gill	2024	2
2	Progress Towards a Transportable Laser-Cooled Yb⁺Microwave Clock P. Sinervo, Martin Knapp, Kerrich Robert, Mike Grehan, G. P. Barwood, RamanPushkala, H. A. Klein, P. Gill	2024	0
3	Trapped strontium ion optical clock G. P. Barwood, P. Gill, H. A. Klein, Kazumoto Hosaka, Guozheng Huang, S.N. Lea, H. S. Margolis, K. Szymaniec, B. Walton	2017	0
4	Frequency noise processes in a strontium ion optical clock Journal of Physics B Atomic Molecular and Optical Physics ·G. P. Barwood, Guozheng Huang, S. A. King, H. A. Klein, P. Gill	2015	9
5	Agreement between two88Sr+optical clocks to 4 parts in 1017 Physical Review A ·G. P. Barwood, Guozheng Huang, H. A. Klein, L. A. M. Johnson, S. A. King, H. S. Margolis, K. Szymaniec, P. Gill	2014	54
6	Automatic laser control for a⁸⁸Sr⁺optical frequency standard Measurement Science and Technology ·G. P. Barwood, P. Gill, Guozheng Huang, H. A. Klein	2012	21
7	Trapped Ion Optical Clocks at NPL AIP conference proceedings ·H. S. Margolis, G. P. Barwood, K. Hosaka, Guozheng Huang, H. A. Klein, S.N. Lea, I.Y. Shama Adam, B. Walton, S. A. Webster, P. Gill	2006	4
8	Measurement of the Electric Quadrupole Moment of the4d D5/22Level inSr+88 Physical Review Letters ·G. P. Barwood, H. S. Margolis, Guozheng Huang, P. Gill, H. A. Klein	2004	63
9	Hertz-Level Measurement of the Optical Clock Frequency in a Single ⁸⁸ Sr ⁺ Ion Science ·H. S. Margolis, G. P. Barwood, Guozheng Huang, H. A. Klein, S.N. Lea, K. Szymaniec, P. Gill	2004	218
10	Trapped ion optical frequency standards Measurement Science and Technology ·P. Gill, G. P. Barwood, H. A. Klein, Guozheng Huang, S. A. Webster, Peter Blythe, Kazumoto Hosaka, S.N. Lea, H. S. Margolis	2003	34
11	Subkilohertz comparison of the single-ion optical-clock2S1/2−2D5/2transition in two88Sr+traps Physical Review A ·G. P. Barwood, Guozheng Huang, H. A. Klein, P. Gill, Roger B. M. Clarke	1999	23
12	Observation of an Electric Octupole Transition in a Single Ion Physical Review Letters ·M. W. Roberts, Paul C.J. Taylor, G. P. Barwood, P. Gill, H. A. Klein, W. R. C. Rowley	1997	92
13	Clearly resolved secular sidebands on the /sup 2/S/sub 1/2/-/sup 2/D/sub 5/2/ 674-nm clock transition in a single trapped Sr/sup +/ ion IEEE Transactions on Instrumentation and Measurement ·G. P. Barwood, P. Gill, H. A. Klein, W. R. C. Rowley	1997	16
14	Precision interferometric frequency measurement of the 674 nm /sup 2/S/sub 1/2/-/sup 2/D/sub 5/2/ transition in a single cold Sr/sup +/ ion IEEE Transactions on Instrumentation and Measurement ·G. P. Barwood, Christopher S. Edwards, P. Gill, Guozheng Huang, H. A. Klein, W. R. C. Rowley	1995	11
15	Observation of the 5s^2S_1/2−4d^2D_5/2 transition in a single laser-cooled trapped Sr^+ ion by using an all-solid-state system of lasers Optics Letters ·G. P. Barwood, Christopher S. Edwards, P. Gill, H. A. Klein, W. R. C. Rowley	1993	32
16	Phase-variation technique for measurement of then=2Lamb shift inHe+using separated oscillatory fields Physical review. A, General physics ·H. A. Klein, E. W. Hagley, P. K. Majumder, F. M. Pipkin, Carlos Shinya Shibata	1987	1
17	Lamb shift measurements in high Z hydrogenic ions Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ·Jemma Newkirk, J. Steven Brown, B.P. Duval, Zhong Ren Zhong Ren, H. A. Klein, Hüseyin Taylan, D. Lecler, P. H. Mokler, J. D. Silver	1985	6
18	Studies of 1s2s 3S-1s2p 3P transitions in helium-like Ne8+ recoil ions using photographic spectroscopy Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ·J. Steven Brown, G.C. Aliyeva, Zhong Ren Zhong Ren, R.A. Holt, H. A. Klein, Hüseyin Taylan, Jemma Newkirk, N J Peacock, J. D. Silver, M. Stamp, J. Takács	1985	13
19	Beam-foil measurements of the 1s2s³S₁-1s2p³P_2,1,0transitions in helium-like F⁷⁺, Mg¹⁰⁺and Al¹¹⁺ Journal of Physics B Atomic and Molecular Physics ·H. A. Klein, F. Moscatelli, E. G. Myers, E. H. Pinnington, J. D. Silver, E. Träbert	1985	17
20	The new gravitation : key to incredible energies Lippincott eBooks ·H. A. Klein	1971	1

About H. A. Klein

H. A. Klein is a scholar working on Statistics, Probability and Uncertainty, Atomic and Molecular Physics, and Optics, Spectroscopy, Bioengineering and Radiation, having authored 48 papers that have together received 944 indexed citations. Recurring topics across this work include Advanced Frequency and Time Standards (32 papers), Cold Atom Physics and Bose-Einstein Condensates (22 papers), Advanced Fiber Laser Technologies (13 papers), Atomic and Molecular Physics (12 papers), Scientific Measurement and Uncertainty Evaluation (12 papers), Atomic and Subatomic Physics Research (9 papers), Spectroscopy and Laser Applications (9 papers) and Advanced Chemical Physics Studies (4 papers). The work is most often cited by research in Atomic and Molecular Physics, and Optics (917 citations), Statistics, Probability and Uncertainty (170 citations), Spectroscopy (206 citations), Radiation (21 citations) and Nuclear and High Energy Physics (31 citations). H. A. Klein has collaborated with scholars based in United Kingdom, Germany and China. Frequent co-authors include P. Gill, Guozheng Huang, G. P. Barwood, H. S. Margolis, G. P. Barwood, W. R. C. Rowley, S.N. Lea, K. Szymaniec, M. W. Roberts and Paul C.J. Taylor. Their work appears in journals such as Physical Review A, Physical Review Letters, IEEE Transactions on Instrumentation and Measurement, Measurement Science and Technology and Review of Scientific Instruments.

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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