Photonuclear channel of 7Be production in the Earth's atmosphere

被引：4

作者：

Bezuglov, M. V. ^{[1
]}

Malyshevsky, V. S. ^{[1
]}

Malykhina, T. V. ^{[2
]}

Torgovkin, A. V. ^{[3
]}

Fomin, G. V. ^{[1
]}

Shramenko, B. I. ^{[3
]}

机构：

[1] So Fed Univ, Rostov Na Donu 344006, Russia

[2] Kharkov Natl Univ, UA-61022 Kharkov, Ukraine

[3] Kharkiv Inst Phys & Technol, UA-61108 Kharkov, Ukraine

来源：

PHYSICS OF ATOMIC NUCLEI | 2012年 / 75卷 / 04期

关键词：

Solar Activity; Atomic Nucleus; Planetary Boundary Layer; Aluminum Nitride; Photonuclear Reaction;

D O I：

10.1134/S1063778812030040

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Measurements of average values of cross sections for the A(gamma,X)Be-7 photonuclear reactions on nitrogen, oxygen, and carbon of natural isotopic composition were performed in the energy range from the threshold to 90 MeV. On the basis of the measured cross sections for Be-7 photoproduction and on the basis of the results obtained by simulating the nuclear-electromagnetic cascade in the Earth's atmosphere, the contribution of the photonuclear mechanism to the production of the cosmogenic radioisotope Be-7 in the atmosphere and its latitude dependence were investigated for the first time. It is shown that the contribution of the photonuclear mechanism is commensurate with the contribution of the proton and neutron mechanisms of 7Be production in the atmosphere and that the inclusion of this mechanism is mandatory in analyzing the accumulation and transfer of Be-7 in the planetary boundary layer.

引用

页码：393 / 397

页数：5

共 11 条

[1]

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[2]

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[3]

Buraeva E. A., 2007, APPAR NOV RAD IZMER, P63

[4]

Cecchini S., 2005, P 29 ICRC PUN