Indian Journal of Pure and Applied Physics

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Systematic Study of Incomplete Fusion Dynamics with Various Entrance Channel Parameters


Affiliations
1 Department of Physics, GF (P. G.) College, Shahjahanpur 242 001, India
2 Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, India
3 Department of Physics, Central University of Kashmir, Ganderbal, Jammu & Kashmir 191 131, India
4 Department of Physics, Nims University of Rajasthan, Jaipur 303 121, India
5 Department of Physics, Aligarh Muslim University, Aligarh 202 002, India
6 Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
7 Inter University Accelerator Centre, New Delhi 110 067, India
 

The present work aims to differentiate the contributions of complete fusion (CF) and incomplete fusion (ICF) components by the measurement and analysis of the forward recoil range distribution of 20Ne projectile with 159Tb target nucleus. The recoil catcher technique has been employed for the identification of residues populated in the collision of 20Ne-ion beam at projectile energy -8.2 MeV per nucleon. The result obtained from the study suggests that the complete fusion reaction occurs with complete momentum transfer, which leads to large recoil ranges of the reaction products. However, the presence of incomplete fusion, resulting from the break-up of 20Ne into 16O + 4He, 12C+ 8Be, and/or 8Be + 12C, involves partial momentum transfer, leading to small recoil ranges where one of the fragments undergoes fusion with the 159Tb target nucleus. Moreover, upon analyzing the data, the ICF fraction (FICF) has been estimated and compared with literature data as a function of various entrance channel parameters, namely Mass-asymmetry (µMA), Coulomb factor (ZPZT), Deformation parameter (β2) and ZPZTxβ2. The outcomes offer valuable insights into the entrance channel parameters that influence incomplete fusion dynamics. Additionally, a new entrance channel parameter called Zeta (ζ) was introduced to investigate the combined effect of µMA and ZPZT.

Keywords

Complete and Incomplete Fusion Reactions, Recoil Range Distribution Measurements, Foil Activation Technique.
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  • Systematic Study of Incomplete Fusion Dynamics with Various Entrance Channel Parameters

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Authors

Rahbar Ali
Department of Physics, GF (P. G.) College, Shahjahanpur 242 001, India
D. Singh
Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, India
Suhail A. Tali
Department of Physics, Central University of Kashmir, Ganderbal, Jammu & Kashmir 191 131, India
Harish Kumar
Department of Physics, Nims University of Rajasthan, Jaipur 303 121, India
Mohd Asif Khan
Department of Physics, GF (P. G.) College, Shahjahanpur 242 001, India
Nitin Sharma
Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, India
Jagat Jyoti Mohapatra
Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, India
Lupteindu Chhura
Centre for Applied Physics, Central University of Jharkhand, Ranchi 835 205, India
M. Afzal Ansari
Department of Physics, Aligarh Muslim University, Aligarh 202 002, India
M. H. Rashid
Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
R. Guin
Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
S. K. Das
Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700 064, India
Rakesh Kumar
Inter University Accelerator Centre, New Delhi 110 067, India
S. Muralithar
Inter University Accelerator Centre, New Delhi 110 067, India

Abstract


The present work aims to differentiate the contributions of complete fusion (CF) and incomplete fusion (ICF) components by the measurement and analysis of the forward recoil range distribution of 20Ne projectile with 159Tb target nucleus. The recoil catcher technique has been employed for the identification of residues populated in the collision of 20Ne-ion beam at projectile energy -8.2 MeV per nucleon. The result obtained from the study suggests that the complete fusion reaction occurs with complete momentum transfer, which leads to large recoil ranges of the reaction products. However, the presence of incomplete fusion, resulting from the break-up of 20Ne into 16O + 4He, 12C+ 8Be, and/or 8Be + 12C, involves partial momentum transfer, leading to small recoil ranges where one of the fragments undergoes fusion with the 159Tb target nucleus. Moreover, upon analyzing the data, the ICF fraction (FICF) has been estimated and compared with literature data as a function of various entrance channel parameters, namely Mass-asymmetry (µMA), Coulomb factor (ZPZT), Deformation parameter (β2) and ZPZTxβ2. The outcomes offer valuable insights into the entrance channel parameters that influence incomplete fusion dynamics. Additionally, a new entrance channel parameter called Zeta (ζ) was introduced to investigate the combined effect of µMA and ZPZT.

Keywords


Complete and Incomplete Fusion Reactions, Recoil Range Distribution Measurements, Foil Activation Technique.

References