| მთავარი > Decay of $^{177}$Ta composite nucleus: comparison of excitation functions for the reaction residues occurring in $^{12}$C + $^{165}$Ho and $^{14}$N + $^{163}$Dy reactions |
| Article | |
| Title | Decay of $^{177}$Ta composite nucleus: comparison of excitation functions for the reaction residues occurring in $^{12}$C + $^{165}$Ho and $^{14}$N + $^{163}$Dy reactions |
| Author(s) | Gupta, S ; Singh, B P ; Musthafa, M M ; Bhardwaj, H D ; Sharma, M K ; Prasad, R ; Sinha, A K |
| Publication | 2002 |
| In: | J. Phys. Soc. Jpn. 71 (2002) 2434-8 |
| Subject category | Nuclear Physics |
| Abstract | An experiment has been performed with a view to studying complete and incomplete fusion in /sup 14/N + /sup 163/Dy system below 7 MeV /nucleon. The excitation functions for several reactions have been measured using the activation technique and compared with the theoretical predictions based on statistical models. The codes ALICE-91 and CASCADE used earlier for the analysis of excitation functions in case of /sup 12/C + /sup 165/Ho system have been used also with the same set of input parameters. It has been observed that the theoretical calculations do not match with the experimental excitation functions well but the overall shape of the excitation function is reproduced satisfactorily. The composite nucleus (/sup 177/Ta) formed in this (/sup 14/N + /sup 163/Dy) case is the same as the one formed in /sup 12/C + /sup 16/5Ho system studied earlier. Measured excitation functions for the same decay channels in the two cases (i.e. /sup 12/C + /sup 165/Ho and /sup 14/N + /sup 163/Dy) have been compared. A comparison of these excitation functions indicates relatively smaller values of cross sections for all reactions in /sup 14/N + /sup 163/Dy in general. Moreover, it has been found that in contrast to the /sup 12/C induced reactions, where a substantial part of the reaction cross section goes through incomplete fusion, there is no contribution from incomplete fusion to the reaction cross section in the case of /sup 14/N induced reactions at these energies. This may indicate that /sup 12/C undergoes breakup into /sup 4/He and /sup 8/Be while /sup 14/N does not undergo breakup below 7 MeV /nucleon. (13 refs). |