Excitation functions and thick target yields of the $$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})^{{95}}\hbox {Zr}$$, $$^{95\mathrm {m}}\hbox {Nb}$$, $$^{95\mathrm {g}}\hbox {Nb}$$ reactions
2020
We measured the excitation functions for the production of the radionuclides
$$^{{95}}\hbox {Zr}$$
,
$$^{95\mathrm {m}}\hbox {Nb}$$
and
$$^{95\mathrm {g}}\hbox {Nb}$$
from the
$$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})$$
reactions in the proton energy range of 10.6–43.6 MeV. The experiment was performed by irradiation of zirconium and copper foils simultaneously using 45 MeV proton beam from the MC-50 Cyclotron at the Korea Institute of Radiological and Medical Sciences, Korea, and the induced activity was measured with an HPGe
$$\upgamma $$
-ray detector. Proton energies along the foil stack were calculated using the computer code SRIM-2013. The proton beam flux entered each foil was determined via the
$$^{\mathrm {nat}}\hbox {Cu}(\hbox {p},\hbox {x})^{{62}}\hbox {Zn}$$
and
$$^{\mathrm {nat}}\hbox {Cu}(\hbox {p},\hbox {x})^{{65}}\hbox {Zn}$$
monitoring reactions. The cumulative cross sections of the
$$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})^{{95}}\hbox {Zr}$$
reaction were measured because it was unable to separate the activity from the decay of
$$^{{95}}\hbox {Y}$$
to
$$^{{95}}\hbox {Zr}$$
. However, independent cross sections of the
$$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})^{95\mathrm {m}}\hbox {Nb}$$
and
$$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})^{95\mathrm {g}}\hbox {Nb}$$
reactions were determined, since the independent activities of
$$^{95\mathrm {m}}\hbox {Nb}$$
and
$$^{95\mathrm {g}}\hbox {Nb}$$
can also be measured. In addition, the thick target yields of the
$$^{{95}}\hbox {Zr}$$
,
$$^{95\mathrm {m}}\hbox {Nb}$$
and
$$^{95\mathrm {g}}\hbox {Nb}$$
isotopes were also determined. The current results are compared with the previously measured data as well as with the theoretical values from the TALYS-1.9 code and the TENDL-2019 data library.
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