Excitation functions and thick target yields of the $$^{\mathrm {nat}}\hbox {Zr}(\hbox {p},\hbox {x})^{{95}}\hbox {Zr}$$
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Regular Article - Experimental Physics
Excitation functions and thick target yields of the nat Zr(p, x)95 Zr, 95m Nb, 95g Nb reactions Van Do Nguyen1,2,3 , Thanh Luan Nguyen3,4 , Thi Hien Nguyen4 , Guinyun Kim4,a , Thi Xuan Nguyen5 , Tien Thanh Kim3 1
Institute of Theoretical and Applied Research, Duy Tan University, Hanoi 100000, Vietnam Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam 3 Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Vietnam 4 Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea 5 Graduate School of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
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Received: 13 April 2020 / Accepted: 9 July 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Communicated by Robert Janssens
Abstract We measured the excitation functions for the production of the radionuclides 95 Zr, 95m Nb and 95g Nb from the nat Zr(p, 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 γ-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 nat Cu(p, x)62 Zn and nat Cu(p, x)65 Zn monitoring reactions. The cumulative cross sections of the nat Zr(p, x)95 Zr reaction were measured because it was unable to separate the activity from the decay of 95 Y to 95 Zr. However, independent cross sections of the nat Zr(p, x)95m Nb and nat Zr(p, x)95g Nb reactions were determined, since the independent activities of 95m Nb and 95g Nb can also be measured. In addition, the thick target yields of the 95 Zr, 95m Nb and 95g 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.
1 Introduction Zirconium has some special properties, therefore, zirconium and its alloys can be used in various applications, including the nuclear industry [1–3]. The reaction products 95 Zr, 95m Nb, and 95g Nb produced from the nat Zr(p, x) reactions are identical to the 95 Zr-95 Nb decay chain in the fission reaca e-mail:
tor, which is considered an ideal chronometer for dating the nuclear explosions [4]. The radioisotope 95g Nb is suitable as a radiotracer that can be used for basic chemical testing of element 105, dubnium [5]. In addition, the 95g Nb is also a promising candidate for medical application, namely for longer-term ex vivo biodistribution studies due to its relatively long half-life (T1/2 = 34.991 d) and its convenient [6]. So far, some measurements on the nat Zr(p, x)95 Zr [7–11], nat Zr(p, x)95m Nb [8–11] and nat Zr(p, x)95g Nb [7–14] nuclear reactions ha
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