Alpha Excitation Functions of Silver and Copper

Abstract

The excitation functions for the production of some of the nuclei formed by alpha-particle bombardment of copper and silver have been measured for alpha energies up to 40 Mev. Comparison of these data with theoretical predictions based on (a) the assumption of relatively large radius constants (ro=1.5 for Zn, ro= 1.65 for Cd) and (b) an energy-dependent odd-odd to even-even level density ratio allows two conclusions: (1) (a,pn) cross sections are in good agreement with predictions based on the statistical theory. This lends some support to the proposal that the large (p,p), (p,pn), (n,p) etc., cross sections recently reported are primarily due to direct interactions. (2) With an energy level density w = C exp2(#£)*, calculations based on the values of a deduced from inelastic scattering experiments do not fit the experimental curves; a derived from measured level spacing agrees with the copper, but not with the silver data. The best fit for the silver gives a~2. This result, similar to that obtained by the analysis of other experimental data, suggests that there is a considerable excess of high-energy evaporated particles.

Measurement of excitation functions in alpha induced reactions on natCu

“…However, most of data from Zweit et al [13] and Porile et al [30] are not consistent with other measurements. Data reported by Porges et al [29] are lower than any other results.…”

“…3 along with the literature data [14][15][16][17][18][19][26][27][28][29][30][31][32] and data extracted from the TENDL-2013 and TENDL-2014 libraries. The comparison shows that the measured results in this work are in good agreement with reported experimental data except few measurements reported by [29][30][31] and model calculations of TENDL-2013 and TENDL-2014 are inconsistent with rest of the experimental data.…”

Investigation of direct production of 68Ga with low energy multiparticle accelerator

“…Additionally, they predict the same energy position of the peak of the excitation function curve at about 16 MeV. Only Porges [30] and Rizvi et al [26] reported systematically lower maximum values. In the case of the peak position data of Porile et al [24] and Bonesso et al [27] seem to be shifted by about 4 MeV towards higher energy direction.…”

“…A survey of the information on cross sections of the 65 Cu(α, n) 68 Ga nuclear reaction found 11 investigations below 40 MeV [20][21][22][23][24][25][26][27][28][29][30]. All the published excitation functions were measured on nat Cu targets except in the measurement of Levkovskij [21].…”

New cross section data and review of production routes of medically used 110mIn

“…[47], Takacs et al [7], Mukherjee et al [48], Guin et al [49], Chaubey [39], Fukushima [40], Chuvilskaya [50], Peng [51], Bleuer [52], Porges [53], Xiufeng [54], Singh et al [43] and the present work. The experimental results are shown in Fig.…”