Discovery of antiproton trapping by long-lived metastable states in liquid helium

M. Iwasaki; S. N. Nakamura; K. Shigaki; Y. Shimizu; H. Tamura; T. Ishikawa; R. S. Hayano; E. Takada; E. Widmann; H. Outa; M. Aoki; P. Kitching; T. Yamazaki

doi:10.1103/PhysRevLett.67.1246

Discovery of antiproton trapping by long-lived metastable states in liquid helium

M. Iwasaki, S. N. Nakamura, K. Shigaki, Y. Shimizu, H. Tamura, T. Ishikawa, R. S. Hayano, E. Takada, E. Widmann, H. Outa, M. Aoki, P. Kitching, T. Yamazaki

SCI - Physics

Research output: Contribution to journal › Article › peer-review

234 Citations (Scopus)

Abstract

Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 sec.

Original language	English
Pages (from-to)	1246-1249
Number of pages	4
Journal	Physical Review Letters
Volume	67
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.67.1246
Publication status	Published - 1991

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10.1103/PhysRevLett.67.1246

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title = "Discovery of antiproton trapping by long-lived metastable states in liquid helium",

abstract = "Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 sec.",

author = "M. Iwasaki and Nakamura, {S. N.} and K. Shigaki and Y. Shimizu and H. Tamura and T. Ishikawa and Hayano, {R. S.} and E. Takada and E. Widmann and H. Outa and M. Aoki and P. Kitching and T. Yamazaki",

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doi = "10.1103/PhysRevLett.67.1246",

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T1 - Discovery of antiproton trapping by long-lived metastable states in liquid helium

AU - Iwasaki, M.

AU - Nakamura, S. N.

AU - Shigaki, K.

AU - Shimizu, Y.

AU - Tamura, H.

AU - Ishikawa, T.

AU - Hayano, R. S.

AU - Takada, E.

AU - Widmann, E.

AU - Outa, H.

AU - Aoki, M.

AU - Kitching, P.

AU - Yamazaki, T.

PY - 1991

Y1 - 1991

N2 - Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 sec.

AB - Delayed annihilation of antiprotons stopped in liquid helium has been observed, revealing that about 3.6% of stopped antiprotons are trapped in long-lived metastable states. No delayed component was found either in liquid nitrogen or in liquid argon. The observed time distribution of delayed annihilation shows fast-decaying components followed by a major part with a decay time constant of 3 sec.

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VL - 67

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EP - 1249

JO - Physical Review Letters

JF - Physical Review Letters

IS - 10

ER -

Discovery of antiproton trapping by long-lived metastable states in liquid helium

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