Volume integral of particle-particle collision probability in nuclear matter

Gadioli, E.; Erba, E. Gadioli; Tagliaferri, G.

doi:10.1103/physrevc.17.1294

Cited by 10 publications

(16 citation statements)

References 22 publications

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“…The projectile flux was measured through the 27 Al(α, 3p) 28 Mg, 27 Al(α, 4p3n) 24 Na, 27 Al(α, 4p5n) 22 Na reactions using known excitation functions [9] as well as from integrating the current from the Faraday cup that held the target. The individual flux values thus obtained were in good agreement and their average was used to determine the cross sections.…”

Section: Methodsmentioning

confidence: 99%

“…However, contribution from DIR emission is negligible. et al [24] find that the absorption of the α-particle through the creation of a particle-hole pair constitutes 60-70% of the reaction cross section. Accordingly, the excitation functions obtained by adding 70% of the cross sections from the n 0 = 6 calculations to 30% of n 0 = 4 are also shown.…”

Section: Au(α Xn) Reactionsmentioning

confidence: 99%

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Excitation function measurement and reaction mechanism analysis for alpha-induced reactions on

Chakravarty

Sarkar

Nandy

et al. 1998

J. Phys. G: Nucl. Part. Phys.

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Excitation functions have been measured for 200,199,197,196 Tl and 195,194 Au produced by α-particle-induced reactions on 197 Au in the incident energy range 34-50 MeV. The excitation functions of these nuclei and those of 198 Tl, 197 Hg, 198,196 Au, reported earlier, are analysed in terms of direct, pre-equilibrium and evaporation emissions. The two most commonly used models of pre-equilibrium reactions, the exciton and the hybrid models, have both been used and compared. The choice of the initial exciton number, the role of the pre-equilibrium cluster and multiple nucleon emissions have been investigated. The direct emission of clusters are found to significantly affect the excitation functions of 197 Hg and Au isotopes.

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Section: Methodsmentioning

confidence: 99%

Section: Au(α Xn) Reactionsmentioning

confidence: 99%

Excitation function measurement and reaction mechanism analysis for alpha-induced reactions on

Chakravarty

Sarkar

Nandy

et al. 1998

J. Phys. G: Nucl. Part. Phys.

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“…However, the cluster emission in nuclear reaction is very complicated, which is dependent on the space-time evolution, beam energy, cluster structure etc. A few of reaction models or phenomenological formula are proposed for the preequilibrium particle emission, e.g, the exciton model [16][17][18], Langevin equations [19], quantum molecular dynamics model [20]. Sophisticated model is still needed for precisely describing the preequilibrium cluster emission.…”

Section: Introductionmentioning

confidence: 99%

Nuclear dynamics in multinucleon transfer reactions near Coulomb barrier energies

et al. 2018

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Cm has been systematically investigated. The production rate, kinetic energy spectra and emission angular distribution are calculated. It is found that the preequilibrium emission mechanism is associated with the reaction system and beam energy. The preequilibrium cross sections of proton, deuteron, triton and alpha are comparable in magnitude. The reaction with 40 Ca is favorable for the cluster emission in comparison with 48 Ca on 238 U at the near barrier energy. A broad angular distribution of the preequilibrium cluster is found in the heavy systems 238 U+ 238 U and 238 U+ 248 Cm.

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“…A successful comparison requires accurate experimental data. Previously, four groups of investigators [19][20][21][22] have studied several alpha-particle induced reactions in this element. However, in about eight reactions, there were discrepancies beyond the experimental errors.…”

Section: Introductionmentioning

confidence: 99%

“…One group [19] has studied these reactions up to 170 MeV. Another group [20] has studied the reactions up to 140 MeV, in energy steps of 20 MeV, with no measurements below 40 MeV, where the transition from the equilibrium to pre-equilibrium reaction mechanism takes place. Earlier, Matsuo et al [21] and Branquinho et al [22] have studied a few (α, xn) reactions in the energy region below 50 MeV, but with very large uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Pre-equilibrium analysis of the alpha-particle induced reactions in niobium in the energy range 30 - 80 MeV

Mukherjee

Singh

1996

J. Phys. G: Nucl. Part. Phys.

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Stacked foil activation technique and Ge(Li) gamma-ray spectroscopy have been used for the investigation of alpha particle induced reactions in the target element niobium up to 80 MeV. Eleven excitation functions were measured for the production of , , , , , , , and with a view to adding new data points in the energy region where there are no existing data, and to improve the quality of earlier measurements having divergencies beyond the experimental errors. Secondly, a comparison with the pre-equilibrium hybrid model and the index model have been made using the initial exciton number (4p0h). While the shapes of the excitation functions were fairly reproduced with both models, the hybrid model consistently resulted in a better agreement.

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Volume integral of particle-particle collision probability in nuclear matter

Cited by 10 publications

References 22 publications

Excitation function measurement and reaction mechanism analysis for alpha-induced reactions on

Excitation function measurement and reaction mechanism analysis for alpha-induced reactions on

Nuclear dynamics in multinucleon transfer reactions near Coulomb barrier energies

Pre-equilibrium analysis of the alpha-particle induced reactions in niobium in the energy range 30 - 80 MeV

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