Velocity spectra and angular distributions of evaporation residues from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">S</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>32</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>+</mml:mo></mml:mrow><mml:mr

Arena, N.; Cavallaro, S.; Feminò, S.; Figuera, P.; Pirrone, S.; Porto, F.; Sambataro, S.

doi:10.1103/physrevc.44.1947

Cited by 12 publications

(7 citation statements)

References 22 publications

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“…3) in agreement with a full linear-momentum transfer for complete fusion reactions as expected by the Morgenstern systematics [37]. Similar results have been recently observed for the neighbouring inverse kinematics 4~ + ~2C [47] and 328 "~ 12C [48,49] reactions at similar and even higher bombarding energies.…”

Section: Energy and Velocity Spectrasupporting

confidence: 87%

“…One should mention that preliminary reports on the 28Si + 12C fusion reaction [64] reveal that the cross sections for complete fusion could be larger. Similar large cross sections at similar bombarding energies [48,49] and 4~ + ~2C at 7 MeV/nucleon by the Berlin group [65]. The DI cross sections are relatively large compared to the fission-like yields but a large fraction of the total reaction cross section is not accounted for either by the fusion (fission + evaporation) or by the DI yields.…”

Section: D) Decomposition Of the Total Reaction Cross Section Amentioning

confidence: 92%

See 1 more Smart Citation

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Beck

Djerroud

Haas

et al. 1992

Z. Physik A - Hadrons and Nuclei

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The binary decay properties of the 477 nucleus, produced in the 35C1 + 12C reaction, have been investigated at the 35C1 bombarding energies Elab=180 and 200 MeV by means of a kinematical coincidence technique. Binary reaction products show full energy equilibration and a characteristic 1/sin(0om ) angular distribution. The elemental distribution of the fully-damped products is asymmetric, similar to what has previously been observed in the decay of the 56Ni nucleus. Comparison with theoretical model predictions suggests the occurrence of a fusion-fission rather than orbiting process. Moreover the calculations performed using the Extended HauserFeshbach Method reproduce well the experimental fission yields~ A general discussion of orbiting and fusionfission experimental data of light heavy-ion systems is presented in the framework of the calculated number of available open channels for these systems.

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Section: Energy and Velocity Spectrasupporting

confidence: 87%

Section: D) Decomposition Of the Total Reaction Cross Section Amentioning

confidence: 92%

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Beck

Djerroud

Haas

et al. 1992

Z. Physik A - Hadrons and Nuclei

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“…However, it should be pointed out that our results are in good agreement with another very recent study [14] of the Si+ ' C system at 31.2 & E, & 46. 2 MeV, and earlier measurements for the S+' C system at E, =39.5 MeV [15] and the Cl+ ' C system at E, =46 and 51 MeV [16].…”

Section: Measurementssupporting

confidence: 68%

Energy dependence of fusion evaporation-residue cross sections in theSi28+
Vineyard
¹
,
Mateja
²
,
Beck
³

et al. 1993
Phys. Rev. C
14
0
7
0
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Fusion evaporation-residue cross sections for the 'Si+ ' C reaction have been measured in the energy range 18~E,~136 MeV using time-of-Aight techniques. Velocity distributions of mass-identified reaction products were used to identify evaporation residues and to determine the complete-fusion cross sections at high energies. The data are in agreement with previously established systematics which indicate an entrance-channel mass-asymmetry dependence of the incomplete-fusion evaporation-residue process. The complete-fusion evaporation-residue cross sections and the deduced critical angular rnomenta are compared with earlier measurements and the predictions of existing models. PACS number(s): 25.70.Jj For more than a decade fusion evaporation-residue cross sections for the Si+' C system have been measured [1 -5] at center-of-mass energies ranging from 14 to 80 MeV. With one exception [1], the grouping and trend of the low-energy (E,~3 1 MeV) data are in reasonable agreement. Higher-energy cross sections measured byHarmon et al. [5] show a rapid decrease with increasing energy. The critical angular momenta extracted from their complete-fusion evaporation-residue cross sections show a saturation at 22A' which indicates an entrancechannel limitation of the fusion cross section at high energy when compared to other systems forming the same compound nucleus. The authors reported that this value for the critical angular momentum saturation is consistent with the results of an orbiting analysis of deepinelastic scattering of Si+' C [6] and supports the idea that the binary cross sections found in this reaction can be attributed to a dinuclear orbiting mechanism [7].In this work we present evaporation-residue cross-IL 60439. section measurements for Si+ ' C in the center-of-mass energy range from 18 to 136 MeV. Initially, data were taken at Si bombarding energies of 309, 397, and 452 MeV as part of a systematic study [8,9) of the energy and target dependence of the incomplete-fusion evaporationresidue process. Additional measurements were then performed at lower energies resulting in data extending over one of the largest energy ranges ever measured for a light system. The fusion evaporation-residue cross sections reported here at Si bombarding energies between 60 and 178 MeV were measured at the Florida State University Superconducting Accelerator Laboratory. The Si beams ranged in intensity from 5 to 30 particle nA and were incident on self-supporting (200 pg/cm ) ' C foils mounted in a 36-cm scattering chamber. The targets were monitored using a 500-pm Si surface-barrier detector positioned at 14.5 above the reaction plane.Mass identification of the reaction products was obtained with the use of a time-of-flight system consisting of a carbonfoil (10 pg/cm ) channel plate to provide the start signal and a 500-pm Si surface-barrier detector to obtain the stop signal and energy of each particle. With a flight path of 2.7 m the detection system subtended a solid angle of 44 psr. Angular distributions were measured over a ran...

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“…Despite a broad coverage in the α and N sys /Z sys variables many of data are for the mass symmetric systems and, in particular, for the systems with the equal number of neutrons N sys and protons Z sys . About 100 additional data points from those measurements which have reported existence of a non-negligible fusion-fission component will be presented p-1 [18,19] 20Ne+16O [20] 24Mg+12C [21] 12C+27Al [22] 16O+24Mg [23] 20Ne+20Ne [20] 28Si+12C [24,25] 14N+27Al [26] 16O+26Mg [23] 18O+24Mg [23] 16O+27Al [27][28][29] 32S+12C [30][31][32][33][34] 20Ne+26Mg [35] 20Ne+27Al [28,36] 20Ne+27Al [28,36] 35Cl+12C [37][38][39] 16O+32S [28] 16O+40Ca [40,41] 28Si+28Si [42][43][44][45][46] 28Si+28Si [42][43][44][45][46] 32S+24Mg [47,48] 19F+40Ca [49,50] 32S+27Al [28,49] 35C...…”

mentioning

confidence: 99%

Towards a unified description of evaporation-residue fusion cross-sections above the barrier

Eudes¹,

Basrak²,

Sébille³

et al. 2013

EPL

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PACS 25.70.Jj -Fusion and fusion-fission reactions PACS 25.70. -z -Low and intermediate energy heavy-ion reactionsAbstract -A meticulous study of nearly 300 fusion-evaporation cross section data reveals that, when properly scaled, fusion excitation function complies with a universal homographic law which is, within experimental errors, reaction system independent. From a such complete and summed complete and incomplete fusion excitation functions extracted are the limiting energy for the complete fusion and the main characteristics (onset, maximum and vanishing) of the incomplete fusion. The DYWAN microscopic transport model correctly predicts the incomplete fusion cross section for incident energies 15A MeV and suggests that the nuclear transparency is at the origin of fusion disappearance.

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Velocity spectra and angular distributions of evaporation residues fromS32+

Cited by 12 publications

References 22 publications

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Energy dependence of fusion evaporation-residue cross sections in theSi28+
Vineyard
¹
,
Mateja
²
,
Beck
³

et al. 1993
Phys. Rev. C
14
0
7
0
View full text Add to dashboard Cite

Towards a unified description of evaporation-residue fusion cross-sections above the barrier

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Velocity spectra and angular distributions of evaporation residues fromS32+

Cited by 12 publications

References 22 publications

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Competition between the fusion-fission and deep-inelastic orbiting mechanisms in the35Cl +12C reaction

Energy dependence of fusion evaporation-residue cross sections in theSi28+Vineyard1, Mateja2, Beck3 et al. 1993Phys. Rev. C14070View full textAdd to dashboardCite

Towards a unified description of evaporation-residue fusion cross-sections above the barrier

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Product

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About

Energy dependence of fusion evaporation-residue cross sections in theSi28+
Vineyard
¹
,
Mateja
²
,
Beck
³

et al. 1993
Phys. Rev. C
14
0
7
0
View full text Add to dashboard Cite