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List of works by Hanspeter Helm

Autoionization of H2 Induced by a Doubly Excited Triplet State

scientific article published on 01 June 1988

Autoionizing Rydberg states in triplet molecular hydrogen

scientific article published on 01 October 1985

Autoionizing np Rydberg states of H2

scientific article published on 01 April 1989

Chemical sensing and imaging with pulsed terahertz radiation.

scientific article published on 14 April 2010

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

scientific article (publication date: 2002)

Dissociative decay of n=3 levels in H2. II. Excited by laser from the metastable c 3 Pi u- state of H2.

scientific article

Double-resonance study of predissociation of the 𝑗3Δ𝑔 state of H2

scientific article published on 01 October 1988

Electric-field ionization of Rydberg states of H3

scientific article published on 01 February 1993

Erratum: Lifetimes and Rydberg-valence state mixing of the c' 1 Sigma g+(v=4) and 1 Pi u(v=4) states of N2

scientific article published on 01 November 1994

Field ionization of high-lying states of H2

scientific article published on 01 September 1987

Forced rotational autoionization of high-lying states of H2

scientific article published on 01 August 1988

Four-photon dissociation and ionization of H2

scientific article published on 01 December 1987

Interactions and Dynamics in Ionic Liquids

scientific article published on 28 March 2008

Lattice modes mediate radiative coupling in metamaterial arrays

scientific article published on 01 November 2009

Lifetimes and Rydberg-valence state mixing of the c' 1 Sigma g+(v=4) and 1 Pi u(v=4) states of N2

scientific article published on 01 October 1993

Measurement of the ionization potential of triatomic hydrogen

scientific article

Metal-insulator phase transition in a V O 2 thin film observed with terahertz spectroscopy

scientific article (publication date: 6 November 2006)

Nonadiabatic coupling and vector correlation in dissociation of triatomic hydrogen

scientific article

Observation of high-n Rydberg series (7<n<40) of the H3 molecule

scientific article published on 01 January 1986

Optical switching of a dc discharge using an excimer laser

Photodissociation of triatomic hydrogen

scientific article published on 01 July 1988

Photoelectron spectroscopy of vibrationally excited H2 (E,F 1 Sigma g+)

scientific article published on 01 December 1989

Photoenhanced electron attachment of vinylchloride and trifluoroethylene at 193 nm

Photoionization of N2 E 3 Sigma g+

scientific article published on 01 July 1988

Picosecond dynamics and microheterogenity of water+dioxane mixtures

scientific article published on 24 February 2007

Predissociation of H3 near its ionization threshold induced by very weak electric fields

scientific article published on 01 April 1991

Predissociation quantum yields of singlet nitrogen

scientific article published on 01 October 1994

Resonant and nonresonant multiphoton ionization of helium

scientific article published on 01 April 1994

Simplification of photoelectron spectra of H2 in intense laser fields

scientific article published on 01 September 1991

Spatial anisotropy of the velocity of electrons emitted from a short-pulse laser focus

scientific article

Spectroscopy and multichannel quantum-defect theory analysis of the np Rydberg series of H3

scientific article published on 01 August 1991

Stark effect in triatomic hydrogen Rydberg states

scientific article published on 01 January 1992

Terahertz pulse propagation in the near field and the far field

scientific article

Terahertz time-domain spectroscopy and imaging of artificial RNA.

scientific article

Three-photon double-resonance spectroscopy of autoionizing Rydberg states in H2

scientific article published on 01 February 1985

Transmission features of frequency-selective components in the far infrared determined by terahertz time-domain spectroscopy

scientific article published on 01 June 1999

Unexpected product fine-structure distributions in (3+1)-photon ionization of xenon.

scientific article published in May 1995

Vibrational autoionization in H3 and measurements of the symmetric-stretch frequency of the metastable 2p A2" state

scientific article published on 01 April 1989

f-electron Rydberg series of triatomic hydrogen

scientific article published on 01 December 1990

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