Measurement of 0.25-3.2 GeV antiprotons in the cosmic radiation

被引：120

作者：

Mitchell, JW

Barbier, LM

Christian, ER

Krizmanic, JF

Krombel, K

Ormes, JF

Streitmatter, RE

Labrador, AW

Davis, AJ

Mewaldt, RA

Schindler, SM

Golden, RL

Stochaj, SJ

Webber, WR

Menn, W

Hof, M

Reimer, O

Simon, M

Rasmussen, IL

机构：

[1] CALTECH, PASADENA, CA 91125 USA

[2] NEW MEXICO STATE UNIV, LAS CRUCES, NM 88003 USA

[3] UNIV SIEGEN, D-57068 SIEGEN, GERMANY

[4] DANISH SPACE RES INST, DK-2800 LYNGBY, DENMARK

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.76.3057

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The balloon-borne Isotope Matter-Antimatter Experiment (IMAX) was flown from Lynn Lake, Manitoba, Canada on 16-17 July 1992. Using velocity and magnetic rigidity to determine mass, we have directly measured the abundances of cosmic ray antiprotons and protons in the energy range from 0.25 to 3.2 GeV. Both the absolute flux of antiprotons and the antiproton/proton ratio are consistent with recent theoretical work in which antiprotons are produced as secondary products of cosmic ray interactions with the interstellar medium. This consistency implies a lower limit to the antiproton lifetime of similar to 10(7) yr.

引用

页码：3057 / 3060

页数：4

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