Sharp change-over from compound nuclear fission to quasifission

Ghosh, T. K.; Banerjee, K.; Bhattacharya, C.; Bhattacharya, S.; Kundu, S.; Mali, Provash; Meena, Jitendra Kumar; Mukherjee, G.; Mukhopadhyay, Supratik; Rana, T. K.; Bhattacharya, Purba; Golda, K. S.

doi:10.1103/physrevc.79.054607

Cited by 24 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The separation of quasifission from complete fusion-fission can be done in a variety of ways. The first method involves measuring the width of the fission mass distributions [24][25][26] . One assumes that fusion-fission gives symmetric mass distributions while quasifission gives rise to very asymmetric mass distributions.…”

Section: Fusion Probabilitiesmentioning

confidence: 99%

Synthetic Paths to the Heaviest Elements

Loveland

2013

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The cross section for producing a heavy reaction product, σEV R, can be represented by the equationwhere σcapture(Ec.m., J) is the capture cross section at center of mass energy Ec.m. and spin J. PCN is the probability that the projectile-target system will evolve from the contact configuration inside the fission saddle point to form a completely fused system rather than reseparating (quasifission, fast fission). Wsur is the probability that the completely fused system will de-excite by neutron emission rather than fission. I discuss results of experiments that characterize these quantities in heavy element synthesis reactions. I also discuss the possibilities of synthesizing heavy nuclei using damped collisions and reactions using radioactive beams.The constants k and a are taken to be 9.8 MeV and (A/12) MeV −1 , respectively. The fission

show abstract

Section: Fusion Probabilitiesmentioning

confidence: 99%

Synthetic Paths to the Heaviest Elements

Loveland

2013

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…The measured mean folding angle values are in good agreement with the calculated values (solid line in figure 2), at all studied energies. The results of folding angle distribution analysis suggest that the contribution, if any, of fission events originating from incomplete momentum transfer or incomplete fusion is negligible in the present reaction channel [45,46].…”

Section: Discussionmentioning

confidence: 74%

Measurement of mass-angle and mass-total kinetic energy distributions from the fission of ¹⁹⁰Pt compound nucleus

Vikas,

Kavita,

Golda

et al. 2024

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

View full text Add to dashboard Cite

We have performed the measurement of fission fragment mass-angle and mass-total kinetic energy distributions (TKE) for the neutron-deficient $^{190}$Pt compound nucleus populated via $^{12}$C + $^{178}$Hf reaction, at around and above barrier energies. No mass-angle correlation was observed in the fission of $^{190}$Pt signifying the absence of quasi-fission events in the studied reaction. The observed mass-total kinetic energy distributions have expected triangular shape and TKE distributions are well described with the single Gaussian fits, and mean total kinetic energy shows parabolic dependence on fragment mass as predicted based on liquid drop (LD) fission behaviour. The widths of measured total kinetic energy distributions agree well with the observed systematics for compound nucleus fission in this mass region. Though the compound nucleus is relatively neutron deficient, these observations suggest a clear picture of true compound nucleus fission behaviour for the chosen reaction in the studied energy domain.\\

show abstract

“…A larger assumed quasifission anisotropy for tip collisions (similar to or higher than the purple-yellow Subsequent measurements of fission characteristics at sub-barrier energies in similar reactions have generally shown anomalous sub-barrier behaviour, but these measurements with fissile actinide target nuclei are not as simple [183,184] as might be thought. Some measurements [185][186][187][188][189] at sub-barrier energies have found very large deviations in angular or mass distributions from expectations for fusion-fission, or from cross-bombardment measurements using other projectiles. These contrast with measurements where smaller, but still significant, effects are seen [41,117,184,[190][191][192][193][194][195], similar to those presented above [41] for 16 O+ 238 U.…”

Section: Evidence From Angular Anisotropiesmentioning

confidence: 98%

Experimental studies of the competition between fusion and quasifission in the formation of heavy and superheavy nuclei

Hinde

Dasgupta

Simpson

2021

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

Sharp change-over from compound nuclear fission to quasifission

Cited by 24 publications

References 17 publications

Synthetic Paths to the Heaviest Elements

Synthetic Paths to the Heaviest Elements

Measurement of mass-angle and mass-total kinetic energy distributions from the fission of ¹⁹⁰Pt compound nucleus

Experimental studies of the competition between fusion and quasifission in the formation of heavy and superheavy nuclei

Contact Info

Product

Resources

About

Sharp change-over from compound nuclear fission to quasifission

Cited by 24 publications

References 17 publications

Synthetic Paths to the Heaviest Elements

Synthetic Paths to the Heaviest Elements

Measurement of mass-angle and mass-total kinetic energy distributions from the fission of 190Pt compound nucleus

Experimental studies of the competition between fusion and quasifission in the formation of heavy and superheavy nuclei

Contact Info

Product

Resources

About

Measurement of mass-angle and mass-total kinetic energy distributions from the fission of ¹⁹⁰Pt compound nucleus