Event calendar file
3-11 July 2007
Merida, Mexico
Mexico/General timezone
- icrc2007@icrc2007.unam.mx
Support
SH 3.6
Place
Location: Merida, Mexico
Room: Yucatan I (Fiesta Americana)
Date:
7 Jul 10:30 - 11:55
Conveners
-
- Dr. Usoskin, Ilya (University of Oulu, Finland)
Timetable | Contribution List
Displaying 7
contributions
out of
7
The increasing number of reports on the gamma-ray detection from thunder clouds and
lightenings indicate that charged particles are accelerated by the strong electric fields
associated with the thunder phenomena. In order to search for high-energy radiation
from winter thunder clouds in the Japan sea coast areas, we have set up an autonomous
radiation detection system at Kashiwasaki, Niigata p
... More
Presented by Mr. Teruaki ENOTO
on
7/7/2007
at
15:42
Cosmogenic radionuclides can be considered as surrogates for a neutron monitor because they are produced mainly
by the interaction of cosmic ray neutrons with nitrogen and oxygen in the atmosphere. Measured in natural
archives such as ice cores (10Be) and tree rings (14C) they record the cosmic ray intensity. Compared to manmade
neutron monitors their time resolution is low (years) and their
... More
Presented by Prof. Juerg BEER
on
7/7/2007
at
16:42
A direct comparison of impulsive nitrate enhancements observed in multiple
polar ice cores from both hemispheres is presented for the years 1940-1950.
During that time period, four ground-level solar cosmic ray events (GLEs) were
recorded by ionization chambers. We show that large and sudden
enhancements in the nitrate records from both hemispheres were observed
within weeks of the dat
... More
Presented by Dr. Don SMART
on
7/7/2007
at
15:30
Baksan Neutrino Observatory results on variations of thermal
neutron flux near
the ground surface measured with an open scintillator
detector are presented.
Experimental evidences were obtained of correlation between
the long-term thermal
neutron flux variations and the lunar periods (Radon-neutron
tidal waves).
Presented by Dr. Victor ALEKSEENKO
on
7/7/2007
at
16:30
Using nitrate enhancements in the polar ice as a proxy for solar proton events,
we have determined the proton fluence above 30 MeV for 31 solar cycles
between 1610 and 1954 (cycle -12 through cycle 18). Our results show a wide
range of solar proton fluences over these 31 solar cycles, from three cycles with
no significant proton events above 10**9 protons/cm to a high of 38 x 10**9
prot
... More
Presented by Dr. Margaret SHEA
on
7/7/2007
at
16:06
At the previous ICRC, Kruger et al. 2005, Proc. 29th ICRC, Pune, 2, 473, and 2,
477, reported on the first tests of two newly constructed calibration neutron
monitors. These monitors are designed to provide an intercalibration between the 50-
odd neutron monitors around the world, so that rigidity spectra can be calculated
from them. In those papers we described the difference in the latitu
... More
Presented by Prof. Harm MORAAL
on
7/7/2007
at
16:18
C-14 concentrations of single-yr tree rings indicate solar modulations of cosmic
rays such as 11-yr solar cycle. Old tree rings are a powerful tool to detect the
variations of cosmic-rays in past time. From C-14 dating, the calendar age of
the Choukai Jindai cedar in Japan (39°N) was ranged in from 2757 to 2437 cal
BP with 320 tree rings. According to IntCal04 which is the standard
inte
... More
Presented by Ms. Yui TAKAHASHI
on
7/7/2007
at
15:54
