TY - RPRT
T1 - SNG-log in borehole Ermelund-208
T2 - - test of background from probe
AU - Korsbech, Uffe C C
PY - 1996
Y1 - 1996
N2 - A Spectral Natural Gamma-ray log has been run in a borehole in
Ermelunden. The vertical distribution of Th, U, and K is similar
to that observed in neighbouring boreholes. A new measuring and
data processing technique was used and the probes own background
signal was determined. Surprisingly a signal not originating form
Th, U, or K was observed. It is concluded that the signal is due
to neutrons originating from nuclear interactions between
energetic cosmic particles and atoms of the soil. After slowing
down to thermal energies the neutrons are captured in hydrogen and
2.2 MeV capture gamma-rays are emitted and detected by the probe.
The intensity of cosmic radiation varies with depth, and,
therefore, slightly influences the accuracy of the thorium
concentration determination.
AB - A Spectral Natural Gamma-ray log has been run in a borehole in
Ermelunden. The vertical distribution of Th, U, and K is similar
to that observed in neighbouring boreholes. A new measuring and
data processing technique was used and the probes own background
signal was determined. Surprisingly a signal not originating form
Th, U, or K was observed. It is concluded that the signal is due
to neutrons originating from nuclear interactions between
energetic cosmic particles and atoms of the soil. After slowing
down to thermal energies the neutrons are captured in hydrogen and
2.2 MeV capture gamma-rays are emitted and detected by the probe.
The intensity of cosmic radiation varies with depth, and,
therefore, slightly influences the accuracy of the thorium
concentration determination.
M3 - Rapport
BT - SNG-log in borehole Ermelund-208
ER -