Concepedia

H. Helm

HH

105

Publications

6.1K

Citations

41

H-Index

1972

Active since

Affiliations

University of Freiburg(Current)

SRI International

Universität Innsbruck

Australian National University

H. Helm is an author at University of Freiburg specializing in engineering, physics, and applied physics.

Top concepts

EngineeringPhysicsNatural SciencesApplied PhysicsAtomic PhysicsSpectroscopyQuantum ChemistryChemistryPhysical ChemistryOptical Properties

Publications per year

1972–2016

105

Publications

105

Far-infrared vibrational spectra of all-trans, 9-cis and 13-cis retinal measured by THz time-domain spectroscopy

M. Walther, Bernd Fischer, M. Schall et al. · Chemical Physics Letters · 2000 · 316 citations

Thz Photonics, Terahertz Spectroscopy, Thz Time-domain Spectroscopy +12

Collective vibrational modes in biological molecules investigated by terahertz time‐domain spectroscopy

M. Walther, Bernd Fischer, H. Helm et al. · Biopolymers · 2002 · 315 citations

Chemical recognition in terahertz time-domain spectroscopy and imaging

Bernd Fischer, Matthias C. Hoffmann, H. Helm et al. · Semiconductor Science and Technology · 2005 · 282 citations

Thz Photonics, Engineering, Absorption Spectroscopy +16

Mass spectrometric determination of partial electron impact ionization cross sections of He, Ne, Ar and Kr from threshold up to 180 eV

K. Stephan, H. Helm, T. D. Märk · The Journal of Chemical Physics · 1980 · 255 citations

Mass Spectrometric Determination, Cross Section Ratios, Ion Extraction +12

Terahertz time-domain spectroscopy and imaging of artificial RNA

Bernd Fischer, Matthias C. Hoffmann, H. Helm et al. · Optics Express · 2005 · 221 citations · Full text

Thz Photonics, Terahertz Spectroscopy, Engineering +14

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