Reaction production + AMS: An alternative method to study low energy reactions.²⁶Al as a test case

Abstract

Considering the importance of the 26 Al nuclei in Astrophysics, in this work, preliminary results regarding a campaign of measurements related with this radioisotope production, are presented. We have taken advantage of two different facilities: first, the radio-nucleus is produced by means of irradiation of targets selected in correlation with particular reactions; once the enrichment with 26 Al was made, the targets are analyzed in an AMS machine to obtain the concentration of 26 Al produced during the irradiation. With this off-line method, it is possible to measure acceptable small cross sections of a selected low energy reaction. In this work, our preliminary results for three different energies of 28 Si(d,α) 26 Al reaction cross sections are shown, as well as our first considerations to commence with measurements of 25 Mg(p,γ) 26 Al reaction cross sections below 1 MeV.

Monoisotopic targets production from atomic and molecular positive ion implantation in a tandem accelerator at low energies

“…Figure 2 shows the RBS analysis spectrum obtained with 1.035 MeV protons (data and SIMNRA simulation) of the 13 C implanted target on aluminum. The areal density achieved in this case is (9.4±13)×10 16 atoms/cm 2 which is also useful for many nuclear reaction studies. Since one of the applications seek in the development of this kind of monoisotopic implanted targets is the study of very low energy nuclear capture cross sections for astrophysics, there is interest of implanting them closer to the surface, that is: at lower energies.…”

“…In this case the implantation run lasted for 102 minutes. The 28 Si film produced inside the glassy carbon matrix is (1.8±5)×10 16 atoms/cm 2 .…”

“…Thousands of samples have been analyzed, some of the more relevant results in applied and interdisciplinary research produced in this facility can be found in [6,7,8,9,10,11,12]. This facility has also been useful for fundamental nuclear physics research [13,14,15,16,17].…”

Restoration of the radio frequency ion source of the 5.5 MV CN-Van de Graaff accelerator at IFUNAM

“…Besides the research programs associated with Material Sciences that take advantage of the availability of IBA techniques, other fields in scientific research are being pushed recently. In particular nuclear physics [7][8][9] and nuclear astrophysics [10][11][12][13][14][15][16], with the joint effort of several Mexican facilities.…”