4
Conferences
false
[["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]
ICN-UNAM
1482bc95ee34f0461176da21871284c8
3
icrc2007@icrc2007.unam.mx
30th International Cosmic Ray Conference
The 30th International Cosmic Ray Conference will be held from July 3, 2007 to July 11, 2007 in Merida, Yucatan, Mexico.
True
Merida, Mexico
2007-07-03T08:00:00
2007-07-11T19:00:00
2005-09-26T05:04:53
2024-04-12T17:46:55
Mexico/General
Dr.
IGeof-UNAM
40af9343b8bb9d18708b4f0252d5f53c
221
false
[["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]
185 (9B)
1
Poster
Long-term Variations in Cosmogenic Be-7 Concentrations with the 11-year Cycle of Solar Activity
Prof.
Rikkyo University
742c94d67bedfa3c6fac371e1935c85b
Prof.
Rikkyo University
742c94d67bedfa3c6fac371e1935c85b
Merida, Mexico
Regency (Hyatt)
Be-7 radionuclide is (half life 53.3 days) is produced from cosmic ray interactions with atmospheric
nuclei. We analyzed long-term (1983-2006) variations in surface Be-7 concentrations in Japan
(geomagnetic latitude ~25N and cutoff rigidity 10 GV) to study an influence of the solar activity.
The measured Be-7 concentrations in surface air depend on not only a production rate of Be-7 but
also a transport process in the atmosphere. The measurements indicated that a ratio of Be-7
concentration in the solar minimum to that in the solar maximum is 1.3-1.4. It is reasonably
explained from the variations in cosmic ray fluxes between the solar minimum and maximum. We
concluded that the long-term variations in Be-7 concentrations is mainly caused by the 11-year
cycle of solar activity and the transport process due to air mass motions does not much contribute
to the variations in Be-7 concentrations.
1
More information about the venue
http://www.icrc2007.unam.mx/
link
http://www.icrc2007.unam.mx/
doc
http://indico.nucleares.unam.mx/images/word.png
word file
ppt
http://indico.nucleares.unam.mx/images/powerpoint.png
powerpoint file
pdf
http://indico.nucleares.unam.mx/images/pdf_small.png
pdf file
odt
http://indico.nucleares.unam.mx/images/writer.png
writer file
odp
http://indico.nucleares.unam.mx/images/impress.png
presentation file
ods
http://indico.nucleares.unam.mx/images/calc.png
spreadsheet file
other
http://indico.nucleares.unam.mx/images/file_small.png
unknown type file
link
http://indico.nucleares.unam.mx/images/link.png
link