Probing of incomplete fusion dynamics by spin-distribution measurement

Singh, Pushpendra P.; Singh, B. P.; Sharma, Manoj K.; Gupta, Unnati; Kumar, R.; Singh, Devendra P.; Singh, R. P.; Murlithar, S.; Ansari, M. Afzal; Prasad, R.; Bhowmik, R. K.

doi:10.1016/j.physletb.2008.11.035

Cited by 66 publications

(55 citation statements)

References 66 publications

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“…The appearance of dye powder obtained from the bark of Acacia nilotica is dark brown and main coloring components are quercetin, acacetin, and ellagitannins ( Figure 1) [23][24][25]. Further, HPLC analysis was done in order to identify the major chemical components of dye extract.…”

Section: Introductionmentioning

confidence: 99%

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

2015

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The present study is aimed to exploit the intrinsic fluorescence emission properties of polyphenols of Acacia nilotica natural dye on natural protein fiber wool. Fluorescence measurements were done before and after dyeing experiments. Owing to these phytoconstituents dyed wool samples illustrate interesting fluorescence property with highest values recorded at 445 nm. Durability of fluorescence finish on exposure to ultraviolet radiations and upon washing has been studied and it was proven that dyed wool samples retain interesting fluorescence properties. Rate of fluorescence fading on exposure to UV radiations follows first order kinetics with decay constant of 9.84×10 -6 s -1 . Results showed adsorption isotherms are best explained by Langmuir type with high regression coefficient value (R 2 =0.998) and dyed wool fibers have an obvious fluorescent effect in the spectral range 400-470 nm. The effects of different metallic mordants on the fluorescence property of dyed wool have been assessed in order to increase fluorescence finish. Wool-mordant-dye interactions were studied by Fourier transform infrared (FT-IR) spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

2015

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“…The fast PLF production in massive transfer reactions was considered as a result of incomplete fusion (ICF) processes. In case of ICF, partial fusion of the projectile with the target nucleus takes place, leading to the formation of a "hot" metastable incompletely fused composite system with less mass, charge, and excitation energy as compared to the complete fusion (CF) population, where the entire projectile merges with the target nucleus [3,4]. Udagawa and Tamura [5,6] explained the production of PLF in massive transfer reactions (ICF) on the basis of the distorted-wave Born approximation (DWBA), in which the projectile is assumed to break up into constituent α clusters, e.g., 12 C may break up into 8 Be+α.…”

Section: Introductionmentioning

confidence: 99%

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

et al. 2014

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Background: Incomplete fusion has been found to be an important contributor in light heavy-ion (A 20) induced reactions even at slightly above barrier energies. Purpose: For better insight into the dynamics of incomplete fusion, the onset and influence of incomplete fusion need to be investigated in terms of projectile energy (E lab ) and entrance channel mass-asymmetry (μ A ). A rich set of experimental data on incomplete fusion may be useful to correlate the probability of incomplete fusion with the various entrance channel parameters and eventually to develop a theoretical model code for the same. Presently, there is no theoretical model available which can explain low-energy incomplete fusion data consistently. Methods: The excitation functions of complete and incomplete fusion residues populated in the 13 C+ 169 Tm system have been measured using the recoil-catcher activation technique followed by offline γ spectroscopy. The evaporation residues have been identified on the basis of characteristic γ lines and confirmed through the decay-curve analysis. Results: The excitation functions of xn and pxn channels are found to be in good agreement with the statistical model code PACE4; this suggests the population of these channels via complete fusion. Some residues are found to have a contribution from their higher charge isobar precursor decay. The precursor contribution has been deduced from the cumulative cross section using the standard successive radioactive decay formulations. The excitation functions of α-emitting channels are observed to be significantly enhanced as compared to the statistical model code PACE4. This enhancement may be attributed to the contribution from incomplete fusion. The incomplete fusion strength function for 13 C+ 169 Tm is compared with that obtained in the 12 C+ 169 Tm system. It has been found that the one-neutron (1n) excess projectile 13 C (as compared to 12 C) results in a less incomplete fusion contribution due to its relatively large negative alpha-Q value. Recently proposed "alpha-Q-value systematics" seems to explain incomplete fusion data.

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“…It may be mentioned that Figs. 3 and 4 show the experimentally measured relative production yield as a function of spins (J) which is termed as 'spin distribution' [11].…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the study of ICF dynamics is still an active area of investigation. Recent studies on spin distributions for the system 16 O + 169 Tm at ≈ 90 MeV beam energy show significantly different patterns in the spin distributions for the reaction products produced by CF and ICF processes [10,11]. To get more information about input angular momentum involved for various degrees of ICF dynamics, a particle-γ coincidence experiment has been performed for the system 16 O + 159 Tb at ≈ 4-7MeV/A projectile energy.…”

Section: Introductionmentioning

confidence: 99%

Incomplete fusion reactions in¹⁶O+¹⁵⁹Tb system: Spin distribution measurements

Sharma

Yadav

Singh

et al. 2015

EPJ Web of Conferences

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Abstract. In order to explore the reaction modes on the basis of their entry state spin population, an experiment has been done by employing particle-γ coincidence technique carried out at the Inter University Accelerator Centre, New Delhi. The preliminary analysis conclusively demonstrates, spin distribution for some reaction products populated via complete and/or incomplete fusion of 16 O with 159 Tb system found to be distinctly different. Further, the existence of incomplete fusion at low bombarding energies indicates the possibility to populate high spin states.

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Probing of incomplete fusion dynamics by spin-distribution measurement

Cited by 66 publications

References 66 publications

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

Incomplete fusion reactions in¹⁶O+¹⁵⁹Tb system: Spin distribution measurements

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Probing of incomplete fusion dynamics by spin-distribution measurement

Cited by 66 publications

References 66 publications

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

Study on the application of Acacia nilotica natural dye to wool using fluorescence and FT-IR spectroscopy

Influence of a one-neutron-excess projectile on low-energy incomplete fusion

Incomplete fusion reactions in16O+159Tb system: Spin distribution measurements

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Incomplete fusion reactions in¹⁶O+¹⁵⁹Tb system: Spin distribution measurements