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NSR database version of April 11, 2024.

Search: Author = H.A.Torii

Found 17 matches.

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2005HO03      Phys.Rev.Lett. 94, 063401 (2005)

M.Hori, J.Eades, R.S.Hayano, W.Pirkl, E.Widmann, H.Yamaguchi, H.A.Torii, B.Juhasz, D.Horvath, K.Suzuki, T.Yamazaki

Observation of Cold, Long-Lived Antiprotonic Helium Ions

ATOMIC PHYSICS 3,4He; measured antiprotonic ions lifetimes.

doi: 10.1103/PhysRevLett.94.063401
Citations: PlumX Metrics

2004HO17      Phys.Rev. A 70, 012504 (2004)

M.Hori, J.Eades, E.Widmann, T.Yamazaki, R.S.Hayano, T.Ishikawa, H.A.Torii, T.von Egidy, F.J.Hartmann, B.Ketzer, C.Maierl, R.Pohl, M.Kumakura, N.Morita, D.Horvath, I.Sugai

Populations and lifetimes in the v=n-l-1=2 and 3 metastable cascades of (p-bar)He+ measured by pulsed and continuous antiproton beams

ATOMIC PHYSICS He(p-bar, X), E at rest; measured antiprotonic helium level populations, lifetimes. Laser spectroscopy.

doi: 10.1103/PhysRevA.70.012504
Citations: PlumX Metrics

2004SA02      Nucl.Instrum.Methods Phys.Res. B214, 89 (2004)

J.Sakaguchi, J.Eades, R.S.Hayano, M.Hori, D.Horvath, T.Ishikawa, B.Juhasz, H.A.Torii, E.Widmann, H.Yamaguchi, T.Yamazaki

Study of the hyperfine structure of antiprotonic helium

NUCLEAR REACTIONS He(p-bar, X), E at rest; measured hfs of antiprotonic helium. Laser-microwave spectroscopy.

ATOMIC PHYSICS He(p-bar, X), E at rest; measured hfs of antiprotonic helium. Laser-microwave spectroscopy.

doi: 10.1016/j.nimb.2003.08.013
Citations: PlumX Metrics

2004SA52      Nucl.Instrum.Methods Phys.Res. A533, 598 (2004)

J.Sakaguchi, H.Gilg, R.S.Hayano, T.Ishikawa, K.Suzuki, E.Widmann, H.Yamaguchi, F.Caspers, J.Eades, M.Hori, D.Barna, D.Horvath, B.Juhasz, H.A.Torii, T.Yamazaki

Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium

doi: 10.1016/j.nima.2004.06.144
Citations: PlumX Metrics

2004YA22      Phys.Rev. A 70, 012501 (2004)

H.Yamaguchi, R.S.Hayano, T.Ishikawa, J.Sakaguchi, E.Widmann, J.Eades, M.Hori, H.A.Torii, B.Juhasz, D.Horvath, T.Yamazaki

Systematic study of the decay rates of antiprotonic helium states

ATOMIC PHYSICS 3,4He(p-bar, X), E at rest; measured antiprotonic helium decay rates. Laser spectroscopy, comparison with model predictions.

doi: 10.1103/PhysRevA.70.012501
Citations: PlumX Metrics

2003SA44      Nucl.Phys. A721, 859c (2003)

J.Sakaguchi, J.Eades, R.S.Hayano, M.Hori, D.Horvath, T.Ishikawa, B.Juhasz, H.A.Torii, E.Widmann, H.Yamaguchi, T.Yamazaki

First observation of the hyperfine and superhyperfine structure of antiprotonic helium by laser-microwave spectroscopy

ATOMIC PHYSICS He(p-bar, X), E at rest; measured hfs of antiprotonic helium. Laser-microwave spectroscopy.

NUCLEAR REACTIONS He(p-bar, X), E at rest; measured hfs of antiprotonic helium. Laser-microwave spectroscopy.

doi: 10.1016/S0375-9474(03)01226-0
Citations: PlumX Metrics

2003YA14      Nucl.Phys. A721, 473c (2003)

H.Yamaguchi, J.Eades, R.S.Hayano, M.Hori, D.Horvath, T.Ishikawa, B.Juhasz, J.Sakaguchi, H.A.Torii, E.Widmann, T.Yamazaki

Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge

ATOMIC PHYSICS He; measured transition frequencies in antiprotonic helium; deduced limits on proton-antiproton mass and charge differences.

doi: 10.1016/S0375-9474(03)01102-3
Citations: PlumX Metrics

2002HO15      Phys.Rev.Lett. 89, 093401 (2002)

M.Hori, J.Eades, R.S.Hayano, T.Ishikawa, J.Sakaguchi, T.Tasaki, E.Widmann, H.Yamaguchi, H.A.Torii, B.Juhasz, D.Horvath, T.Yamazaki

Primary Populations of Metastable Antiprotonic 4He and 3He Atoms

ATOMIC PHYSICS 3,4He(p-bar, X), E=low; measured annihilation time spectra, population of antiprotonic atoms metastable states. Laser spectroscopy.

NUCLEAR REACTIONS 3,4He(p-bar, X), E=low; measured annihilation time spectra, population of antiprotonic atoms metastable states. Laser spectroscopy.

doi: 10.1103/PhysRevLett.89.093401
Citations: PlumX Metrics

2002JU03      Eur.Phys.J. D 18, 261 (2002)

B.Juhasz, J.Eades, R.S.Hayano, M.Hori, D.Horvath, T.Ishikawa, J.Sakaguchi, H.A.Torii, E.Widmann, H.Yamaguchi, T.Yamazaki

Quenching of Metastable Antiprotonic Helium Atoms in Collisions with Deuterium Molecules

ATOMIC PHYSICS He; measured decay rates of antiprotonic helium, quenching via collisions with deuterium molecules.

doi: 10.1007/s10053-002-8829-9
Citations: PlumX Metrics

2002WI16      Phys.Rev.Lett. 89, 243402 (2002)

E.Widmann, J.Eades, T.Ishikawa, J.Sakaguchi, T.Tasaki, H.Yamaguchi, R.S.Hayano, M.Hori, H.A.Torii, B.Juhasz, D.Horvath, T.Yamazaki

Hyperfine Structure of Antiprotonic Helium Revealed by a Laser-Microwave-Laser Resonance Method

ATOMIC PHYSICS He; measured hfs in antiprotonic helium. Laser-microwave-laser resonance method.

doi: 10.1103/PhysRevLett.89.243402
Citations: PlumX Metrics

2001KE04      Eur.Phys.J. D 13, 305 (2001)

B.Ketzer, T.von Egidy, F.J.Hartmann, C.Maierl, R.Pohl, J.Eades, E.Widmann, T.Yamazaki, M.Kumakura, N.Morita, R.S.Hayano, M.Hori, T.Ishikawa, H.A.Torii, I.Sugai, D.Horvath

Collisional Quenching of Metastable States of Antiprotonic Helium by Hydrogen and Deuterium Molecules

NUCLEAR REACTIONS He(p-bar, X), E at rest; measured annihilation rates in antiprotonic helium, quenching due to molecular collisions.

ATOMIC PHYSICS He(p-bar, X), E at rest; measured annihilation rates in antiprotonic helium, quenching due to molecular collisions.

doi: 10.1007/s100530170246
Citations: PlumX Metrics

2000HA24      Nucl.Phys. A663-664, 955c (2000)

R.S.Hayano, J.Eades, T.von Egidy, F.J.Hartmann, M.Hori, D.Horvath, T.Ishikawa, B.Ketzer, M.Kumakura, C.Maierl, N.Morita, R.Pohl, I.Sugai, H.A.Torii, E.Widmann, T.Yamazaki, for the CERN-PS205 and ASACUSA Collaboration

Laser Spectroscopy of Antiprotonic Helium and Stringent Constraint on the Antiproton Charge and Mass

ATOMIC PHYSICS 4He(p-bar, X), E at rest; measured antiprotonic helium energy levels. Laser spectroscopy.

doi: 10.1016/S0375-9474(99)00806-4
Citations: PlumX Metrics

1999TO13      Nucl.Phys. A655, 295c (1999)

H.A.Torii

Latest News from PS205 High-Precision Laser Spectroscopy of Antiprotonic Helium Atoms

ATOMIC PHYSICS He(p-bar, X), E at rest; measured transition vacuum wavelengths in antiprotonic atoms. High-precision laser spectroscopy. Comparison with theoretical predictions.

doi: 10.1016/S0375-9474(99)00216-X
Citations: PlumX Metrics

1998HA50      Phys.Rev. A58, 3604 (1998)

F.J.Hartmann, B.Ketzer, C.Maierl, R.Pohl, T.von Egidy, R.S.Hayano, M.Hori, T.Ishikawa, H.Tamura, H.A.Torii, M.Kumakura, N.Morita, I.Sugai, D.Horvath, J.Eades, E.Widmann, T.Yamazaki

Laser Spectroscopy of Metastable States in the ν = 2 Cascade of Antiprotonic 3He

NUCLEAR REACTIONS 3He(p-bar, X), E at rest; measured pion spectra, annihilation times; deduced target pressure dependence of antiprotonic 3He metastable states lifetimes. Resonant laser deexcitation.

ATOMIC PHYSICS 3He(p-bar, X), E at rest; measured pion spectra, annihilation times; deduced target pressure dependence of antiprotonic 3He metastable states lifetimes. Resonant laser deexcitation.

doi: 10.1103/PhysRevA.58.3604
Citations: PlumX Metrics

1997WI10      Phys.Lett. 404B, 15 (1997)

E.Widmann, J.Eades, T.Yamazaki, H.A.Torii, R.S.Hayano, M.Hori, T.Ishikawa, M.Kumakura, N.Morita, I.Sugai, F.J.Hartmann, T.von Egidy, B.Ketzer, C.Maierl, R.Pohl, D.Horvath

Hyperfine Structure of the Metastable (p-bar)He+ Atomcule Revealed by a Laser-Induced (n, l) = (37, 35) → (38, 34) Transition

ATOMIC PHYSICS He(p-bar, X), E=low; analyzed data; deduced metastable (p-bar)He+ metastable atomcule hfs.

doi: 10.1016/S0370-2693(97)00538-8
Citations: PlumX Metrics

1996KE17      Phys.Rev. A53, 2108 (1996)

B.Ketzer, F.J.Hartmann, H.Daniel, T.von Egidy, A.Niestroj, S.Schmid, W.Schmid, T.Yamazaki, I.Sugai, K.Nakayoshi, R.S.Hayano, F.E.Maas, H.A.Torii, T.Ishikawa, H.Tamura, N.Morita, D.Horvath, J.Eades, E.Widmann

Isotope Effects on Delayed Annihilation Time Spectra of Antiprotonic Helium Atoms in a Low-Temperature Gas

NUCLEAR REACTIONS 3,4He(p-bar, X), E at 200 MeV/c; measured delayed annihilation time spectra; deduced overall trapping times ratio. Beam passed through thick Be window before entering low-temperature gas targets.

ATOMIC PHYSICS 3,4He(p-bar, X), E at 200 MeV/c; measured delayed annihilation time spectra; deduced overall trapping times ratio. Beam passed through thick Be window before entering low-temperature gas targets.

doi: 10.1103/PhysRevA.53.2108
Citations: PlumX Metrics

1994HA44      Phys.Rev.Lett. 73, 1485 (1994); Errata Phys.Rev.Lett. 73, 3181 (1994)

R.S.Hayano, F.E.Maas, H.A.Torii, N.Morita, M.Kumakura, T.Yamazaki, H.Masuda, I.Sugai, F.J.Hartmann, H.Daniel, T.von Egidy, B.Ketzer, W.Muller, W.Schmid, D.Horvath, J.Eades, E.Widmann

Laser Studies of the Decay Chain of Metastable Antiprotonic Helium Atoms

ATOMIC PHYSICS He(p-bar, X), E at rest; measured upper state population time dependence; deduced exotic atom states initial population, T1/2. Laser studies.

doi: 10.1103/PhysRevLett.73.1485
Citations: PlumX Metrics

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