1ST LASER EXCITATION OF THE HE-4 1(1)S-2(1)P RESONANCE LINE AT 58-NM

K.S.E. Eikema, W.M.G. Ubachs, W. Vassen, W. Hogervorst

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We have observed the 1 1S-2 1P resonance line of He4 at 58.4 nm (linewidth 0.3 cm-1) in a laser-atomic-beam experiment. The coherent radiation is produced by fifth-harmonic generation of UV light from a frequency-doubled, pulsed dye laser at 584 nm in a pulsed expansion of acetylene gas. The frequency of the fundamental radiation is calibrated against the iodine absorption spectrum, resulting in a transition frequency of 171 134.89(3) cm-1. From this value a Lamb shift for the ground state of +1.38(3) cm-1 is extracted, in good agreement with the theoretical value of +1.3745 cm-1 © 1993 The American Physical Society.
Original languageEnglish
Pages (from-to)1690-1692
JournalPhysical Review Letters
Volume71
Issue number11
DOIs
Publication statusPublished - 1993

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resonance lines
excitation
lasers
coherent radiation
atomic beams
dye lasers
acetylene
iodine
pulsed lasers
harmonic generations
laser beams
absorption spectra
expansion
ground state
shift
radiation
gases

Cite this

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title = "1ST LASER EXCITATION OF THE HE-4 1(1)S-2(1)P RESONANCE LINE AT 58-NM",
abstract = "We have observed the 1 1S-2 1P resonance line of He4 at 58.4 nm (linewidth 0.3 cm-1) in a laser-atomic-beam experiment. The coherent radiation is produced by fifth-harmonic generation of UV light from a frequency-doubled, pulsed dye laser at 584 nm in a pulsed expansion of acetylene gas. The frequency of the fundamental radiation is calibrated against the iodine absorption spectrum, resulting in a transition frequency of 171 134.89(3) cm-1. From this value a Lamb shift for the ground state of +1.38(3) cm-1 is extracted, in good agreement with the theoretical value of +1.3745 cm-1 {\circledC} 1993 The American Physical Society.",
author = "K.S.E. Eikema and W.M.G. Ubachs and W. Vassen and W. Hogervorst",
year = "1993",
doi = "10.1103/PhysRevLett.71.1690",
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pages = "1690--1692",
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1ST LASER EXCITATION OF THE HE-4 1(1)S-2(1)P RESONANCE LINE AT 58-NM. / Eikema, K.S.E.; Ubachs, W.M.G.; Vassen, W.; Hogervorst, W.

In: Physical Review Letters, Vol. 71, No. 11, 1993, p. 1690-1692.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - 1ST LASER EXCITATION OF THE HE-4 1(1)S-2(1)P RESONANCE LINE AT 58-NM

AU - Eikema, K.S.E.

AU - Ubachs, W.M.G.

AU - Vassen, W.

AU - Hogervorst, W.

PY - 1993

Y1 - 1993

N2 - We have observed the 1 1S-2 1P resonance line of He4 at 58.4 nm (linewidth 0.3 cm-1) in a laser-atomic-beam experiment. The coherent radiation is produced by fifth-harmonic generation of UV light from a frequency-doubled, pulsed dye laser at 584 nm in a pulsed expansion of acetylene gas. The frequency of the fundamental radiation is calibrated against the iodine absorption spectrum, resulting in a transition frequency of 171 134.89(3) cm-1. From this value a Lamb shift for the ground state of +1.38(3) cm-1 is extracted, in good agreement with the theoretical value of +1.3745 cm-1 © 1993 The American Physical Society.

AB - We have observed the 1 1S-2 1P resonance line of He4 at 58.4 nm (linewidth 0.3 cm-1) in a laser-atomic-beam experiment. The coherent radiation is produced by fifth-harmonic generation of UV light from a frequency-doubled, pulsed dye laser at 584 nm in a pulsed expansion of acetylene gas. The frequency of the fundamental radiation is calibrated against the iodine absorption spectrum, resulting in a transition frequency of 171 134.89(3) cm-1. From this value a Lamb shift for the ground state of +1.38(3) cm-1 is extracted, in good agreement with the theoretical value of +1.3745 cm-1 © 1993 The American Physical Society.

U2 - 10.1103/PhysRevLett.71.1690

DO - 10.1103/PhysRevLett.71.1690

M3 - Article

VL - 71

SP - 1690

EP - 1692

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 11

ER -