Observation of cold, long-lived antiprotonic helium ions

Cold, two-body antiprotonic helium ions p /sup 4/He/sup 2+/ and p /sup 3/He/sup 2+/ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers n/sub i/=28-32 and l/sub i/=n/sub i /-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ult...

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Detalles Bibliográficos
Autores principales: Hori, M, Eades, John, Hayano, R S, Horváth, D, Juhász, B, Pirkl, Werner, Suzuki, K, Torii, H A, Widmann, E, Yamaguchi, H, Yamazaki, T
Lenguaje:eng
Publicado: 2005
Materias:
Other Fields of Physics
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.94.063401
http://cds.cern.ch/record/908833
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author Hori, M
Eades, John
Hayano, R S
Horváth, D
Juhász, B
Pirkl, Werner
Suzuki, K
Torii, H A
Widmann, E
Yamaguchi, H
Yamazaki, T
author_facet Hori, M
Eades, John
Hayano, R S
Horváth, D
Juhász, B
Pirkl, Werner
Suzuki, K
Torii, H A
Widmann, E
Yamaguchi, H
Yamazaki, T
author_sort Hori, M
collection CERN
description Cold, two-body antiprotonic helium ions p /sup 4/He/sup 2+/ and p /sup 3/He/sup 2+/ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers n/sub i/=28-32 and l/sub i/=n/sub i /-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ultra-low-density helium target at temperature T~10 K by atomic collisions, and then removing their electrons by inducing a laser transition to an autoionizing state. The lifetimes of p /sup 3/He/sup 2+/ against annihilation induced by collisions were shorter than those of p /sup 4/He/sup 2+/, and decreased for larger-n/sub i/ states.
id cern-908833
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-9088332019-09-30T06:29:59Zdoi:10.1103/PhysRevLett.94.063401http://cds.cern.ch/record/908833engHori, MEades, JohnHayano, R SHorváth, DJuhász, BPirkl, WernerSuzuki, KTorii, H AWidmann, EYamaguchi, HYamazaki, TObservation of cold, long-lived antiprotonic helium ionsOther Fields of PhysicsCold, two-body antiprotonic helium ions p /sup 4/He/sup 2+/ and p /sup 3/He/sup 2+/ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers n/sub i/=28-32 and l/sub i/=n/sub i /-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ultra-low-density helium target at temperature T~10 K by atomic collisions, and then removing their electrons by inducing a laser transition to an autoionizing state. The lifetimes of p /sup 3/He/sup 2+/ against annihilation induced by collisions were shorter than those of p /sup 4/He/sup 2+/, and decreased for larger-n/sub i/ states.oai:cds.cern.ch:9088332005
spellingShingle Other Fields of Physics
Hori, M
Eades, John
Hayano, R S
Horváth, D
Juhász, B
Pirkl, Werner
Suzuki, K
Torii, H A
Widmann, E
Yamaguchi, H
Yamazaki, T
Observation of cold, long-lived antiprotonic helium ions
title Observation of cold, long-lived antiprotonic helium ions
title_full Observation of cold, long-lived antiprotonic helium ions
title_fullStr Observation of cold, long-lived antiprotonic helium ions
title_full_unstemmed Observation of cold, long-lived antiprotonic helium ions
title_short Observation of cold, long-lived antiprotonic helium ions
title_sort observation of cold, long-lived antiprotonic helium ions
topic Other Fields of Physics
url https://dx.doi.org/10.1103/PhysRevLett.94.063401
http://cds.cern.ch/record/908833
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