Large pre-equilibrium contribution in {alpha}+{sup nat}Ni interactions at {approx_equal}8-40 MeV

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.044606· OSTI ID:21192317

Yadav, Abhishek; Singh, Pushpendra P; Sharma, Manoj K; Singh, Devendra P; Unnati,; Singh, B P; Prasad, R; Musthafa, M M ^[1]

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1. Department of Physics, Aligarh Muslim University, Aligarh (UP) 202002 (India)

To investigate pre-equilibrium emission of light nuclear particle(s), an experiment has been performed using {alpha} beams at the Variable Energy Cyclotron Center (VECC), Kolkata, India. In the present work, excitation functions for {sup 58}Ni({alpha},p){sup 61}Cu,{sup 58}Ni({alpha},pn){sup 60}Cu,{sup 60}Ni({alpha},p2n){sup 61}Cu,{sup 60}Ni({alpha},n){sup 63}Zn,{sup 60}Ni({alpha},2n) {sup 62}Zn,{sup 61}Ni({alpha},3n){sup 62}Zn, and {sup 61}Ni({alpha},2n){sup 63}Zn reactions have been measured by using the stacked foil activation technique followed by off-line {gamma}-ray spectroscopy. Experimentally measured excitation functions have been compared with the prediction of the theoretical model code ALICE-91 with and/or without the inclusion of pre-equilibrium emission. Analysis of the data suggests that an admixture of both equilibrium and pre-equilibrium emission is needed to reproduce experimental data at energies {approx_equal}8-40 MeV and reveals significant contribution from pre-equilibrium emission. An attempt has also been made to estimate the pre-equilibrium contribution, which has been found to depend on projectile energy and on number of emitted particle(s)

• OSTI ID: 21192317
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevC.78.044606; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
BEAMS
COPPER 60
COPPER 61
EMISSION
EQUILIBRIUM
EXCITATION FUNCTIONS
FORECASTING
GAMMA SPECTROSCOPY
INTERACTIONS
LIGHT NUCLEI
MEV RANGE
NEUTRONS
NICKEL 58 TARGET
NICKEL 60 TARGET
NICKEL 61 TARGET
NUCLEAR REACTIONS
PARTICLES
PROTON-EMISSION DECAY
VARIABLE ENERGY CYCLOTRONS
ZINC 62
ZINC 63