Excitation functions of alpha-induced nuclear reactions on natural erbium and natural ytterbium targets

Abstract

Yb(α,x) 171,172,177g,178m Lu and nat Yb(α,x) 169,177 Yb were measured up to 38 MeV for application purposes (medical isotope production and charged particle activation analysis). The experimental excitation functions are compared to the theoretical calculations based on the model code ALICE-IPPE. The literature is very poor regarding cross section measurements on erbium or ytterbium irradiated with alpha particles. Yields of different production routes (proton-, deuteron-and alpha-irradiation) of 169 Yb and 177 Lu are compared.

Study of activation cross sections of deuteron induced reactions on erbium in the 32–50 MeV energy range

“…MeV (Király et al, 2007 and the proton induced reactions up to 70 MeV (Hermanne et al, 2011a;Tarkanyi et al, 2016;Tárkányi et al, 2008Tárkányi et al, , 2009 have already been reported by us.…”

Reference Cross Sections for Charged-particle Monitor Reactions

“…Although the characteristic γ-ray decay line at 320.082 keV has only a moderate intensity of 9.910%, this emission allows an accurate assessment of the 51 Cr activity produced. Fifteen publications with experimental cross-section data within the specified incident particle energy range of interest were identified in the literature [86,211,275,[301][302][303][304][305][306][307][308][309][310][311][312], and are represented with their uncertainties in Fig. 31(a).…”

“…nat Ti(a,x) 51 nat Ti(a,x) 51 Cr [86,211,275,[301][302][303][304][305][306][307][308][309][310][311][312] for the nat Ti(α,x) 51 Cr monitor reaction.…”

“…Data points below 5 MeV of Király et al (2008) [305] and Takács et al(2007) [309] and the outlying value of Hermanne et al (1999)(a)[303] at 18.7 MeV were not considered in the fitting process. The remaining eight datasets from eight publications were used for the leastsquares fitting[301,303,305,[307][308][309][310][311]. A Padé function with 11 parameters was fitted to 242 selected data points with χ 2 =1.50 covering the energy range from 5 to 45 MeV,…”

Activation cross-sections of proton induced reactions on natHf in the 38–65 MeV energy range: Production of 172Lu and of 169Yb

“…There is large disagreement between experimental data of Homma 1980 [55], Archenti [56], Sonzogni 1992 [57] and Kiraly 2007 [58] (Fig. 36).…”