Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules

T. Yamazaki, B. Ketzer, E. Widmann, J. Eades, H. Daniel, F. J. Hartmann, M. Hasinoff, R. Pohl, R. Schmidt, T. Von Egidy, D. Horváth, M. Kumakura, N. Morita, I. Sugai, Y. Fujita, H. A. Torii, M. Hori, T. Ishikawa, F. E. Maas, H. Tamura & 1 others R. S. Hayano

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalChemical Physics Letters
Volume265
Issue number1-2
Publication statusPublished - Jan 31 1997

Fingerprint

Helium
helium
Molecules
Lasers
admixtures
lasers
molecules
Quenching
quenching
interactions
life (durability)
cross sections

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Yamazaki, T., Ketzer, B., Widmann, E., Eades, J., Daniel, H., Hartmann, F. J., ... Hayano, R. S. (1997). Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules. Chemical Physics Letters, 265(1-2), 137-144.

Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules. / Yamazaki, T.; Ketzer, B.; Widmann, E.; Eades, J.; Daniel, H.; Hartmann, F. J.; Hasinoff, M.; Pohl, R.; Schmidt, R.; Von Egidy, T.; Horváth, D.; Kumakura, M.; Morita, N.; Sugai, I.; Fujita, Y.; Torii, H. A.; Hori, M.; Ishikawa, T.; Maas, F. E.; Tamura, H.; Hayano, R. S.

In: Chemical Physics Letters, Vol. 265, No. 1-2, 31.01.1997, p. 137-144.

Research output: Contribution to journalArticle

Yamazaki, T, Ketzer, B, Widmann, E, Eades, J, Daniel, H, Hartmann, FJ, Hasinoff, M, Pohl, R, Schmidt, R, Von Egidy, T, Horváth, D, Kumakura, M, Morita, N, Sugai, I, Fujita, Y, Torii, HA, Hori, M, Ishikawa, T, Maas, FE, Tamura, H & Hayano, RS 1997, 'Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules', Chemical Physics Letters, vol. 265, no. 1-2, pp. 137-144.
Yamazaki T, Ketzer B, Widmann E, Eades J, Daniel H, Hartmann FJ et al. Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules. Chemical Physics Letters. 1997 Jan 31;265(1-2):137-144.
Yamazaki, T. ; Ketzer, B. ; Widmann, E. ; Eades, J. ; Daniel, H. ; Hartmann, F. J. ; Hasinoff, M. ; Pohl, R. ; Schmidt, R. ; Von Egidy, T. ; Horváth, D. ; Kumakura, M. ; Morita, N. ; Sugai, I. ; Fujita, Y. ; Torii, H. A. ; Hori, M. ; Ishikawa, T. ; Maas, F. E. ; Tamura, H. ; Hayano, R. S. / Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules. In: Chemical Physics Letters. 1997 ; Vol. 265, No. 1-2. pp. 137-144.
@article{f592bd603271445a8e879c520ca7e917,
title = "Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules",
abstract = "We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.",
author = "T. Yamazaki and B. Ketzer and E. Widmann and J. Eades and H. Daniel and Hartmann, {F. J.} and M. Hasinoff and R. Pohl and R. Schmidt and {Von Egidy}, T. and D. Horv{\'a}th and M. Kumakura and N. Morita and I. Sugai and Y. Fujita and Torii, {H. A.} and M. Hori and T. Ishikawa and Maas, {F. E.} and H. Tamura and Hayano, {R. S.}",
year = "1997",
month = "1",
day = "31",
language = "English",
volume = "265",
pages = "137--144",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Laser resonance studies of the interactions of metastable antiprotonic helium atomcules p̄4He+ with surrounding H2 molecules

AU - Yamazaki, T.

AU - Ketzer, B.

AU - Widmann, E.

AU - Eades, J.

AU - Daniel, H.

AU - Hartmann, F. J.

AU - Hasinoff, M.

AU - Pohl, R.

AU - Schmidt, R.

AU - Von Egidy, T.

AU - Horváth, D.

AU - Kumakura, M.

AU - Morita, N.

AU - Sugai, I.

AU - Fujita, Y.

AU - Torii, H. A.

AU - Hori, M.

AU - Ishikawa, T.

AU - Maas, F. E.

AU - Tamura, H.

AU - Hayano, R. S.

PY - 1997/1/31

Y1 - 1997/1/31

N2 - We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.

AB - We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.

UR - http://www.scopus.com/inward/record.url?scp=0031592391&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031592391&partnerID=8YFLogxK

M3 - Article

VL - 265

SP - 137

EP - 144

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 1-2

ER -