Measurement of low-energy cosmic-ray antiprotons at solar minimum

被引：64

作者：

Matsunaga, H ^{[1
]}

Orito, S

Matsumoto, H

Yoshimura, K

Moiseev, A

Anraku, K

Golden, R

Imori, M

Makida, Y

Mitchell, J

Motoki, M

Nishimura, J

Nozaki, M

Ormes, J

Saeki, T

Sanuki, T

Streitmatter, R

Suzuki, J

Tanaka, K

Ueda, I

Yajima, N

Yamagami, T

Yamamoto, A

Yoshida, T

机构：

[1] Univ Tokyo, Tokyo 1130033, Japan

[2] Kobe Univ, Kobe, Hyogo 6578501, Japan

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[4] New Mexico State Univ, Las Cruces, NM 88003 USA

[5] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[6] Inst Space & Astronaut Sci, Kanagawa 2298510, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.81.4052

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS 1995 data. The resultant energy spectrum appears to be flat below 1 GeV, compatible with a possible admixture of primary antiproton component with a soft energy spectrum, while the possibility of secondary antiprotons alone explaining the data cannot be excluded with the present accuracy. Further improvement of statistical accuracy and extension of the energy range are planned in future BESS flights. [S0031-9007(98)07573-5].

引用

页码：4052 / 4055

页数：4

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