Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu
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Ohio University / OhioLINK
2014
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417437958 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou14174379582021-08-03T06:28:23Z Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu Ramirez, Anthony Paul D. Nuclear Physics nuclear level density The nuclear level density is known to be the major source of uncertainty in the calculation of compound cross sections. The problem is attributed to the fact that most experimental level density information is obtained from the neutron resonance data, which are confined to narrow ranges of excitation energy and angular momentum. In addition, the level density derived from the average neutron resonance spacing is strongly dependent on the spin cut-off parameter, which is not known experimentally at the neutron binding energy. To minimize these uncertainties, we study the nuclear level density using the analysis of evaporation spectra from compound nuclear reactions.Double differential cross sections and angular distributions for the (d,n), (d,p), (d,d), and (d,a) reactions have been measured with deuteron energies between 5 and 9 MeV. The angular distributions of outgoing particles have indicated that cross sections measured at backward angles are dominated by compound reaction mechanism. These cross sections were used to test known nuclear level density models commonly applied in nuclear reaction codes: (1) the Fermi gas model [1]; (2) the Gilbert-Cameron model [2]; and (3) the microscopic model using the Hartree-Fock-Bogoliubov method [3].The nuclear level densities of <sup>64</sup>Zn, <sup>66</sup>Zn, <sup>55</sup>Fe, <sup>57</sup>Fe, <sup>55</sup>Co, <sup>57</sup>Co, <sup>59</sup>Co, <sup>52</sup>Mn, <sup>54</sup>Mn, and <sup>56</sup>Mn have been deduced from the experimental compound cross sections. Most of the best-fit parameters have been found to agree with the Gilbert-Cameron model with parameters according to Iljinov systematics [4]. The compound fractions of the total cross sections have been observed to decrease with increasing bombarding energy for all reactions. The contribution of deuteron breakup has negligible effect in the backward angles. 2014 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417437958 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417437958 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Nuclear Physics nuclear level density |
| spellingShingle |
Nuclear Physics nuclear level density Ramirez, Anthony Paul D. Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| author |
Ramirez, Anthony Paul D. |
| author_facet |
Ramirez, Anthony Paul D. |
| author_sort |
Ramirez, Anthony Paul D. |
| title |
Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| title_short |
Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| title_full |
Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| title_fullStr |
Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| title_full_unstemmed |
Study of Nuclear Level Densities from Deuteron-Induced Reactions on <sup>54,56,58</sup>Fe and <sup>63,65</sup>Cu |
| title_sort |
study of nuclear level densities from deuteron-induced reactions on <sup>54,56,58</sup>fe and <sup>63,65</sup>cu |
| publisher |
Ohio University / OhioLINK |
| publishDate |
2014 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417437958 |
| work_keys_str_mv |
AT ramirezanthonypauld studyofnuclearleveldensitiesfromdeuteroninducedreactionsonsup545658supfeandsup6365supcu |
| _version_ |
1719437402106232832 |