Fission fragment angular distributions in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Be</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>9</mml:mn></mml:mrow></mml:mmultiscripts></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvar

Appannababu, S.; Thomas, R. G.; Danu, L. S.; Rath, P. K.; Gupta, Y. K.; John, B. V.; Nayak, B. K.; Biswas, D. C.; Saxena, A.; Mukherjee, S.; Choudhury, R. K.

doi:10.1103/physrevc.83.067601

Cited by 3 publications

(15 citation statements)

References 14 publications

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“…As expected, σ fiss for the highly fissile 241 Pu * is the major contributor to the total decay cross sections and the contribution from the evaporation residue (ER) cross section σ ER is not measured in [7]. Comparison of anisotropy data for the CN 241 Pu * is in good accord with the predictions of SSPM at above-barrier energies but show significant deviations for energies below the barrier.…”

Section: Introductionsupporting

confidence: 77%

“…Thus, the noted deviation in the measured anisotropy data from SSPM predictions seems to be associated with the possible breakup of the loosely bound 9 Be projectile nucleus as suggested in Ref. [7].…”

Section: Introductionmentioning

confidence: 83%

“…Various models such as the pre-equilibrium fission model of Ramamurthy and Kapoor [3,4] and entrance-channeldependent (ECD) K-state model by Vorkapic and Ivanisevic [5] were proposed to explain the anomalous fission fragment angular distribution for the systems having contribution from non-compound-nucleus fission. A systematic study [6] on the behavior of the stable weakly bound projectiles 6,7 Li and 9 Be on heavy targets such as 208 Pb and 209 Bi was made and it was observed that complete fusion (CF) is suppressed by around 30%. This fusion suppression was observed to be associated with the presence of ICF.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the entrance channel mass asymmetry η [=(A T − A P )/(A T + A P ), where A T and A P are the target and projectile mass, respectively] with respect to the Businaro-Gallone critical mass asymmetry α BG plays an important role in the reaction dynamics [1,2]. Several measurements involving reactions with lighter projectiles such as 6,7 Li, 9 Be, 10,11 B, and 12 C on deformed actinide targets have shown that the anisotropies exceed the standard statistical saddle-point model (SSPM) predictions by large amounts, at sub-barrier energies. This anomalous behavior of the fragment anisotropies has been a subject of extensive investigations both experimentally and theoretically in the recent past.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a 9 Be beam has been used and fission fragment anisotropies, together with fission excitation functions, have been measured for the compound nucleus 241 Pu * formed by the 9 Be + 232 Th reaction over a wide range of energies spread around the Coulomb barrier [7]. As expected, σ fiss for the highly fissile 241 Pu * is the major contributor to the total decay cross sections and the contribution from the evaporation residue (ER) cross section σ ER is not measured in [7].…”

Section: Introductionmentioning

confidence: 99%

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Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
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The decay of the hot and rotating compound nucleus 241 Pu * formed in the reaction 9 Be + 232 Th around the Coulomb barrier (≈42.16 MeV), at energies ranging from 37 to 48 MeV, is studied using the dynamical cluster-decay model (DCM) with the effects of static and dynamic deformations included. With the inclusion of dynamical deformations both the preformation probability P 0 and the tunneling probability P , and hence the cross sections, change considerably. The only parameter of the model, namely, the neck-length parameter, varies smoothly with excitation energy or temperature of the system both at above-and below-barrier energies, whose value depends strongly on the limiting angular momentum, which in turn depends on the sticking and nonsticking moments of inertia. The relative effect of static and dynamic deformations on the neck-length parameter R is also studied which indicates the reaction time scale for both static and dynamic choices of deformation. In addition, the exclusive role of angular momentum and "barrier modification" effects at sub-barrier energies are also addressed. Although calculated anisotropies are consistent with the results of Appannababu et al. [Phys. Rev. C 83, 067601 (2011)], no significant contribution of a noncompound nucleus in the form of incomplete fusion is seen on the basis of DCM calculations.

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Section: Introductionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
20
0
27
0
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Nuclear fission: a review of experimental advances and phenomenology

2017

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In the last two decades, through technological, experimental and theoretical advances, the situation in experimental fission studies has changed dramatically. With the use of advanced production and detection techniques both much more detailed and precise information can now be obtained for the traditional regions of fission research and, crucially, new regions of nuclei have become routinely accessible for fission studies. This work first of all reviews the recent developments in experimental fission techniques, in particular the resurgence of transfer-induced fission reactions with light and heavy ions, the emerging use of inverse-kinematic approaches, both at Coulomb and relativistic energies, and of fission studies with radioactive beams. The emphasis on the fission-fragment mass and charge distributions will be made in this work, though some of the other fission observables, such as prompt neutron and γ-ray emission will also be reviewed. A particular attention will be given to the low-energy fission in the so far scarcely explored nuclei in the very neutron-deficient lead region. They recently became the focus for several complementary experimental studies, such as β-delayed fission with radioactive beams at ISOLDE(CERN), Coulex-induced fission of relativistic secondary beams at FRS(GSI), and several prompt fusion-fission studies. The synergy of these approaches allows a unique insight in the new region of asymmetric fission around [Formula: see text]Hg, recently discovered at ISOLDE. Recent extensive theoretical efforts in this region will also be outlined. The unprecedented high-quality data for fission fragments, completely identified in Z and A, by means of reactions in inverse kinematics at FRS(GSI) and VAMOS(GANIL) will be also reviewed. These experiments explored an extended range of mercury-to-californium elements, spanning from the neutron-deficient to neutron-rich nuclides, and covering both asymmetric, symmetric and transitional fission regions. Some aspects of heavy-ion induced fusion-fission and quasifission reactions will be also discussed, which reveal their dynamical features, such as the fission time scale. The crucial role of the multi-chance fission, probed by means of multinucleon-transfer induced fission reactions, will be highlighted. The review will conclude with the discussion of the new experimental fission facilities which are presently being brought into operation, along with promising 'next-generation' fission approaches, which might become available within the next decade.

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Non-compound-nucleus fission events and standard saddle-point statistical model

Soheyli

Khalili

2012

Phys. Rev. C

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The large body of experimental data on the fission fragments anisotropies are analyzed in several heavy-ion induced fission reaction systems. The entrance channel mass asymmetry parameters of these systems put on the both sides of the Businaro-Gallone mass asymmetry parameters. The role of the mass numbers of the projectile and the target in the prediction of a normal or an anomalous behavior in angular anisotropy, as well as the validity of standard saddle-point statistical model are considered. The average contribution of non compound nucleus fission for the systems with an anomalous behavior in anisotropy are also determined.

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Fission fragment angular distributions in theBe9+

Cited by 3 publications

References 14 publications

Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
20
0
27
0
View full text Add to dashboard Cite

Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
20
0
27
0
View full text Add to dashboard Cite

Nuclear fission: a review of experimental advances and phenomenology

Non-compound-nucleus fission events and standard saddle-point statistical model

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Fission fragment angular distributions in theBe9+

Cited by 3 publications

References 14 publications

Decay of241Pu*formed in9Be + Sawhney1, Kumar2, Sharma3 2012Phys. Rev. C200270View full textAdd to dashboardCite

Decay of241Pu*formed in9Be + Sawhney1, Kumar2, Sharma3 2012Phys. Rev. C200270View full textAdd to dashboardCite

Nuclear fission: a review of experimental advances and phenomenology

Non-compound-nucleus fission events and standard saddle-point statistical model

Contact Info

Product

Resources

About

Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
20
0
27
0
View full text Add to dashboard Cite

Decay of241Puformed in9Be +
Sawhney¹,
Kumar²,
Sharma³
2012
Phys. Rev. C*
20
0
27
0
View full text Add to dashboard Cite