JAEA-Conf 2011-002 - 日本原子力研究開発機構

Fig.3. Two-dimensional plot of PI versus particle energy for the oxygen induced
reactions on the carbon target at 5 degrees.
In the present work, DDXs were obtained by the following equation,
Y
DDX
(
2)
N N E
b
JAEA-Conf 2011-002
t
d
where Y is the number of deuterons per energy bin, Nb is the number of incident particles
on a target, Nt is the number of atomic nuclei in the target, Ed is the width of an energy bin,
Ω is a solid angle, εp is the peak efficiency, and εD is the efficiency of data acquisition system.
The value of Y was obtained by the following way. First, PI projection spectrum was
generated for each energy bin of 20 MeV width from the two-dimensional plot of PI versus
energy. Fig. 4 shows the example of PI projection spectrum in the energy bin of 70-90 MeV
for the oxygen induced reactions on the carbon target at 5 degrees. As is shown in Fig. 3, the
peak around PI = 300 corresponds to deuteron events. The deuteron yield Y was obtained by
fitting the histogram of deuteron events with a Gaussian function.
Fig.4. PI projection spectrum in the energy bin of 70-90 MeV for the oxygen induced reactions
on the carbon target at 5 degrees.
p
D