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Study of roo
m
-return neutrons
详细信息
查看全文
作者:
Hé
;
ctor René
;
Vega-Carrillo
;
Eduardo
M
anzanares-Acuñ
;
a
;
M
arí
;
a Pilar Iñ
;
iguez
;
Eduardo Gallego
;
Alfredo
Lorente
关键词:
Roo
m
return neutrons
;
Ther
m
al neutrons
;
M
onoenergetic source
;
M
onte Carlo
刊名:Radiation
M
easure
m
ents
出版年:2007
出版时间:
M
arch 2007
年:2007
卷:42
期:3
页码:413-419
全文大小:461 K
文摘
The coefficient that relates the neutron source strength and inner roo
m
surface area with the ther
m
al neutron fluence rates has been calculated for neutrons whose energy
goes
fro
m
1 eV to 20 MeV. This coefficient was calculated using Monte Carlo
m
ethods for 150, 200 300, 535.24, 832.10 and 1010 c
m
-radius spherical cavity with and without air. In the calculations
m
onoenergetic neutron sources were located at the center of cavity and, along the spherical cavity radius, neutron spectra were deter
m
ined at several source-to-detector distances. Fro
m
the neutron spectra the ther
m
al neutron
me=""
mm
l3""> contribution was calculated and several coefficients were esti
m
ated. A weighted average of all coefficients was esti
m
ated being
me=""
mm
l4"">
method=retrieve&_udi=B6TVS-4N1T1YK-3&_
m
athId=
mm
l4&_user=10&_cdi=5542&_rdoc=14&_acct=C000050221&_version=1&_userid=10&
m
d5=bd6c4c375b9f67f7fbfb02d71e481feb"" title=""Click to view the MathML source"">5.6±0.1, this is the
me=""
mm
l5"">
method=retrieve&_udi=B6TVS-4N1T1YK-3&_
m
athId=
mm
l5&_user=10&_cdi=5542&_rdoc=14&_acct=C000050221&_version=1&_userid=10&
m
d5=9d4da8db3df917f5513a940247ac2afb"" title=""Click to view the MathML source"">
c
-value for the case of roo
m
s without air, and
me=""
mm
l6"">
method=retrieve&_udi=B6TVS-4N1T1YK-3&_
m
athId=
mm
l6&_user=10&_cdi=5542&_rdoc=14&_acct=C000050221&_version=1&_userid=10&
m
d5=0996b43d083c1efd6058fe1d895a0224"" title=""Click to view the MathML source"">4.8±0.4, for roo
m
s with air. In the ai
m
to co
m
pare the results with
m
onoenergetic neutrons, calculations were also perfor
m
ed using two isotopic neutron sources,
me=""
mm
l7""> and
me=""
mm
l8""> in vacuu
m
.
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