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NSR database version of April 27, 2024.

Search: Author = Niyti

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2022NI05      Physics of Part.and Nuclei 53, 441 (2022)

Niyti, A.Deep, R.Kharab, R.Singh, S.Chopra

Study of Decay Properties of ²⁶⁰Sg^* Nucleus Formed in ⁵²Cr + ²⁰⁸Pb Reaction by Using GSkI Skyrme Force

NUCLEAR REACTIONS ²⁰⁸Pb(⁵²Cr, X)²⁶⁰Sg, E=13.3, 18.6 MeV; analyzed available data; deduced σ using the Dynamical Cluster-decay Model (DCM).

doi: 10.1134/S1063779622020642
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2020DE33      Phys.Rev. C 102, 034607 (2020)

A.Deep, Niyti, R.Kharab, R.Singh, S.Chopra

Examining the entrance channel effects on the synthesis of the double deformed nucleus ²⁷⁰Hs: A theoretical study using the dynamical cluster-decay model including Skyrme forces

NUCLEAR REACTIONS ²⁶Mg(²⁴⁸Cm, xn)²⁷⁴Hs^*,36S(²³⁸U, xn)²⁷⁴Hs^*,48Ca(²²⁶Ra, xn)²⁷⁴Hs^*, E^*=40-51 MeV; calculated fusion evaporation residue cross sections for 3n-, 4n- and 5n-channels, mass fragmentation potentials, preformation yields, excitation function of individual 3n- to 5n-evaporation channels, best-fitted neck-length parameter using dynamical cluster-decay model (DCM), with Skyrme energy density functionals. Comparison with experimental data. Relevance to super-heavy nuclei.

doi: 10.1103/PhysRevC.102.034607
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2019DE31      Int.J.Mod.Phys. E28, 1950079 (2019)

A.Deep, Niyti, R.Kharab, R.Singh, S.Chopra

Skyrme forces and isotopic dependence of evaporation residue cross-section in the decay of ^{252, 254-256}No^* formed in ^{204, 206, 207, 208}Pb ⁴⁸Ca reactions

NUCLEAR REACTIONS ^{204,206,207,208}Pb(⁴⁸Ca, X)^{252,254,255,256}No, E=20-45 MeV; analyzed available data; calculated preformation yields and probabilities, σ.

RADIOACTIVITY ^{252,254,255,256}No(n), (2n), (3n), (4n); analyzed available data; deduced fusion evaporation residue σ for he decay of compound nuclei using the Skyrme energy density functional (SEDF)-based on semi-classical extended Thomas Fermi (ETF) approach under frozen density approximation.

doi: 10.1142/S0218301319500794
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2018NI10      Acta Phys.Pol. B49, 639 (2018)

Niyti, R.Singh, A.Deep, R.Kharab, S.Chopra, R.K.Gupta

Dynamical Cluster-decay Model Based on Skyrme Force KDE0(v1) and the Dynamics of^{208, 206, 204}Pb+⁴⁸Ca → ^{256, 254, 252}No^* Reaction

NUCLEAR REACTIONS ^204,206,208Pb(⁴⁸Ca, xn)^252,254,256No, E^*=19.6-43.6 MeV; calculated channel cross section σ_xn for fixed x (x=1-4, but most of calculations done for 2n emission) vs E^*; compared with available published data; calculated "optimum hot" fusion reactions σ using Dynamical Cluster-decay Model (DCM) with pocket formula for the proximity potential; deduced that they reproduce data well with neck-length parameter fitted.

doi: 10.5506/aphyspolb.49.639
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2017NI04      Phys.Rev. C 95, 034602 (2017)

Niyti, A.Deep, R.Kharab, S.Chopra, R.K.Gupta

Skyrme forces and decay of the²⁶⁶₁₀₄Rf^* nucleus synthesized via different incoming channels

NUCLEAR REACTIONS ²⁴⁸Cm(¹⁸O, X)²⁶⁶Rf*, E=88.2-101.3 MeV; ²⁴⁴Pu(²²Ne, X)²⁶⁶Rf*, E=109.0-124.8 MeV; calculated mass fragmentation potentials, preformation yields. ²⁴⁸Cm(¹⁸O, 4n), (¹⁸O, 5n), (¹⁸O, 6n), ²⁴⁴Pu(²²Ne, 4n), ²⁴⁴Pu(²²Ne, 5n)²⁴⁴Pu(²²Ne, 6n), E=80-130 MeV; calculated σ(E), neck-length parameters, preformation and penetration probabilities. ²⁵⁸Md(⁸Li, X), ²⁵⁴Es(¹²B, X), ²⁴²Pu(²²Ne, X), ²¹⁸Po(⁴⁸Ca, X), ²¹²Pb(⁵⁴Ti, X), ²⁰⁵Au(⁶¹Mn, X), ²⁴²Pu(²²Ne, X), ¹⁹⁵Os(⁷¹Ni, X), ¹⁹²W(⁷⁴Zn, X), ¹⁸²Yb(⁸⁴Se, X), ¹⁵⁷Nd(¹⁰⁹Ru, X), ¹³²Te(¹³⁴Te, X), E=94.8 MeV; calculated evaporation residue σ for 4n-, 5n-, and 6n-decay channels of compound nucleus ²⁶⁶Rf in the dynamical cluster-decay model (DCM). Skyrme energy density functional (SEDF) based on semiclassical extended Thomas Fermi (ETF) approach, and using SIII, SIV, new GSkI and KDE0(v1) forces.

doi: 10.1103/PhysRevC.95.034602
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2015NI04      Nucl.Phys. A938, 22 (2015)

Niyti, R.K.Gupta, P.O.Hess

Evaporation residue cross-section in the decay of ²⁵⁴No^* formed in ²⁰⁶Pb + ⁴⁸Ca and its isotopic dependence using other Pb targets within the dynamical cluster-decay model

NUCLEAR REACTIONS ²⁰⁶Pb(⁴⁸Ca, xn), E=212.7-242.5 MeV. ²⁵⁴No^* calculated fragment preformation probability, 1n to 4n preformation probability vs angular momentum, channel σ, evaporation σ. ^{204,206,207,208}Pb(⁴⁸Ca, 2n), E^*≈19.8, 23.0, 24.5 MeV; calculated σ; deduced radius variation from the fit to σ data. DCM (dynamic cluster model) with deformation and orientation effects included.

doi: 10.1016/j.nuclphysa.2015.02.009
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2015NI07      Phys.Rev. C 91, 054606 (2015)

Niyti, G.Sawhney, M.K.Sharma, R.K.Gupta

α-decay chains of recoiled superheavy nuclei: A theoretical study

RADIOACTIVITY ²⁷¹Sg, ^{270,271,272,274}Bh, ²⁷⁵Hs, ^{274,275,276,278}Mt, ²⁷⁹Ds, ^{278,279,280,282}Rg, ²⁸³Cn, ^{282,283,284,285,286}Nh, ^286,287Fl, ^{287,288,289,290}Mc, ^290,291Lv, ^293,294Ts, ²⁹⁴Og(α); calculated half-lives of isotopes, Z=113-118 formed in hot fusion heavy-ion reactions ²³⁷Np, ²⁴³Am, ²⁴⁴Pu, ²⁴⁵Cm, ²⁴⁹Bk, ²⁴⁹Cf(⁴⁸Ca, xn). Extension of the quantum-mechanical fragmentation theory based on preformed cluster model (PCM) to include temperature dependence. Comparison with experimental values, and with other theoretical calculations.

NUCLEAR REACTIONS ²⁴⁹Bk(⁴⁸Ca, 4n)²⁹³Ts*, E not given; calculated mass fragmentation potential, preformation probability as function of fragment mass number. ²³⁷Np(⁴⁸Ca, 3n)²⁸²Mc*, E not given; ²⁴²Pu(⁴⁸Ca, 3n)²⁸⁷Fl*, E not given; ²⁴³Am(⁴⁸Ca, 3n)²⁸⁸Mc*, E not given; ²⁴³Am(⁴⁸Ca, 4n)²⁸⁷Mc*, E not given; ²⁴⁵Cm(⁴⁸Ca, 3n)²⁹⁰Lv*, E not given; ²⁴⁹Cf(⁴⁸Ca, 3n)²⁹⁴Og*, E not given; ²⁴⁹Bk(⁴⁸Ca, 3n)²⁹⁴Ts*, E not given; ²⁴⁹Bk(⁴⁸Ca, 4n)²⁹³Ts*, E not given; calculated best-fit neck-length parameter, preformation probability, penetrability as function of mass number of α-decay chains. Extension of the quantum-mechanical fragmentation theory based on preformed cluster model (PCM) to include temperature dependence.

doi: 10.1103/PhysRevC.91.054606
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2014NI03      Phys.Rev. C 89, 014603 (2014)

Niyti, R.K.Gupta

Synthesis of the doubly magic deformed nucleus ²⁷⁰₁₀₈Hs₁₆₂ in the decay of ²⁷⁴Hs formed via hot fusion reactions: Entrance-channel effects and role of magicity of ⁴⁸Ca and ²⁷⁰Hs

NUCLEAR REACTIONS ²⁴⁸Cm(²⁶Mg, X)²⁷⁴Hs*, ²³⁸U(³⁶S, X)²⁷⁴Hs*, ²²⁶Ra(⁴⁸Ca, X)²⁷⁴Hs*; calculated A=6-268 mass fragmentation potentials, preformation yields, scattering potentials for cold fusion, neck-length parameter. Entrance channel effects. Cold and hot fusion. Hot compact and cold elongated configurations. ^269,270,271Hs; calculated σ(E) for 3n, 4n and 5n evaporation channels from ²⁷⁴Hs compound nucleus, and comparison with experimental data. Quantum mechanical fragmentation theory (QMFT) for possible target-projectile combinations. Dynamical cluster-decay model (DCM) with quadrupole deformations for decay of compound nucleus.

doi: 10.1103/PhysRevC.89.014603
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2010NI16      J.Phys.(London) G37, 115103 (2010)

Niyti, R.K.Gupta, W.Greiner

Establishing the island of stability for superheavy nuclei via the dynamical cluster-decay model applied to a hot fusion reaction ⁴⁸Ca + ²³⁸U → ²⁸⁶112^*

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, X)²⁸⁶Cn, E(cm)=200.6 MeV; calculated scattering potentials, preformation probability for compound system, neck-length parameter, fusion ER σ. Dynamical cluster model (DCM).

doi: 10.1088/0954-3899/37/11/115103
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2009GU06      Int.J.Mod.Phys. E18, 601 (2009)

R.K.Gupta, Niyti, M.Manhas, S.Hofmann, W.Greiner

Role of static deformation and compact orientation of target nucleus in measured fusion, fusion-fission and capture cross-sections of ²⁴⁴Pu + ⁴⁸Ca reaction

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, X), E≈ 31-53 MeV; calculated the fusion evaporation, fusion-fusion and quasi-fission excitation functions, neutron evaporation σ. Dynamical cluster decay model.

doi: 10.1142/S0218301309012744
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2009GU25      J.Phys.(London) G36, 115105 (2009)

R.K.Gupta, Niyti, M.Manhas, W.Greiner

Island of stability for superheavy elements and the dynamical cluster-decay model for fusion evaporation residue cross sections: ⁴⁸Ca+²³⁸U → ²⁸⁶112^* as an example

NUCLEAR REACTIONS ²³⁸U(⁴⁸Ca, X)²⁸⁶Cn, E(cm)=200.6 MeV; calculated fusion evaporation residue σ for 3- and 4-neutron emission; deduced island of stability around Z=126 and N=184.

doi: 10.1088/0954-3899/36/11/115105
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2008GU20      Int.J.Mod.Phys. E17, 2244 (2008)

R.K.Gupta, S.K.Arun, D.Singh, R.Kumar, Niyti, SK.Patra, P.Arumugam, B.K.Sharma

Clusters in light, heavy, super-heavy and super-superheavy nuclei

doi: 10.1142/S0218301308011422
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