Extended &ggr;‐ray emission in solar flares
作者:
G. Rank,
K. Bennett,
H. Bloemen,
H. Debrunner,
J. Lockwood,
M. McConnell,
J. Ryan,
V. Scho¨nfelder,
R. Suleiman,
期刊:
AIP Conference Proceedings
(AIP Available online 1996)
卷期:
Volume 374,
issue 1
页码: 219-224
ISSN:0094-243X
年代: 1996
DOI:10.1063/1.50958
出版商: AIP
数据来源: AIP
摘要:
During the solar flare events on 11 and 15 June 1991, COMPTEL measured extended emission in the neutron capture line for about 5 hours after the impulsive phase. The time profiles can be described by a double exponential decay with decay constants on the order of 10 min for the fast and 200 min for the slow component. Within the statistical uncertainty both flares show the same long‐term behaviour. The spectrum during the extended phase is significantly harder than during the impulsive phase and pions are not produced in significant numbers before the beginning of the extended emission. Our results with the measurements of others allow us to rule out long‐term trapping of particles in non‐turbulent loops to explain the extended emission of these two flares and our data favour models based on continued acceleration. ©1996 American Institute of Physics.
点击下载:
PDF
(323KB)
返 回