DISCOVERY OF ANTIPROTON TRAPPING BY LONG-LIVED METASTABLE STATES IN LIQUID-HELIUM

被引：234

作者：

IWASAKI, M

NAKAMURA, SN

SHIGAKI, K

SHIMIZU, Y

TAMURA, H

ISHIKAWA, T

HAYANO, RS

TAKADA, E

WIDMANN, E

OUTA, H

AOKI, M

KITCHING, P

YAMAZAKI, T

机构：

[1] UNIV TOKYO, FAC SCI, MESON SCI LAB, TOKYO 113, JAPAN

[2] NATL INST RADIOL SCI, CHIBA 260, JAPAN

[3] UNIV TOKYO, INST NUCL STUDY, TOKYO 188, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.67.1246

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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-mu-sec.

引用

页码：1246 / 1249

页数：4

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