<p>Reaction cross sections were measured for protons at 65.5 MeV, for deuterons at 37.8, 65.5, 97.4 MeV, for <sup>3</sup>He at 96.4, 137.8, 167.3 MeV, and for <sup>4</sup>He at 69.6, 117.2, 163.9 and 192.4 MeV. Targets were <sup>9</sup>Be, <sup>12</sup>C, <sup>16</sup>O, <sup>28</sup>Si, <sup>40,48</sup>Ca, <sup>58,60</sup>Ni, <sup>112,116,118,120,124</sup>Sn and <sup>208</sup>Pb. <sup>48</sup>Ca and <sup>118</sup>Sn targets were used only for some of the measurements. Rest of the targets have been measured for all energies and projectiles but <sup>4</sup>He at 69.6 MeV where reaction cross sections were measured for <sup>9</sup>Be, <sup>12</sup>C, <sup>16</sup>O, <sup>28</sup>Si, <sup>40</sup>Ca targets. A modification of a standard attenuation technique was used. Details of the experimental design are presented.</p><p>Experimental uncertainties were 2-3% for p, 3% for d and 3-10% for <sup>3,4</sup>He. </p><p>A strong forward peaking of the reaction products was observed for <sup>3,4</sup>He. Therefore the standard reaction cross section measurement technique was not applicable for these projectiles. The forward peaking is also responsible for the increase of experimental uncertainties for these projectiles. The forward peaking of the reaction products is not known for other projectiles and has also not been observed with <sup>3,4</sup>He at different - both higher and lower - energies. Possible explanations for this phenomenon are discussed.</p><p>Optical model calculations of the reaction cross sections are in good agreement with the measured values.</p><p>The measurements were performed with beams from the Gustav Werner cyclotron at the The Svedberg Laboratory, Uppsala.</p>
| Identifer | oai:union.ndltd.org:UPSALLA/oai:DiVA.org:uu-4633 |
| Date | January 2004 |
| Creators | Auce, Agris |
| Publisher | Uppsala University, Department of Nuclear and Particle Physics, Uppsala : Acta Universitatis Upsaliensis |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Doctoral thesis, comprehensive summary, text |
| Relation | Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, 1104-232X ; 1030 |
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