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NSR database version of April 11, 2024.

Search: Author = N.J.Upadhyay

Found 11 matches.

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2022RO06      Phys.Rev. C 105, 034311 (2022)

D.F.Rojas-Gamboa, J.E.Perez Velasquez, N.G.Kelkar, N.J.Upadhyay

Manifestation of deformation and nonlocality in α and cluster decay

RADIOACTIVITY 222Ra(α), (14C); 223Ra(α), (14C); 228Th(α), (20O); 231Pa(α), (23F); 232U(α), (24Ne); 233U(α), (24Ne), (28Mg); 235U(α), (25Ne), (28Mg); 237Np(α), (30Mg); 236Pu(α), (28Mg); 241Am(α), (34Si); 242Cm(α), (34Si); calculated T1/2, preformation factors, penetration probabilities, half-life dependence on deformation. Studied the nonlocality effects with 2 different nuclear potential models - the energy-independent but angular momentum-dependent Mumbai potential and the energy-dependent Perey-Buck (PB) potential.

doi: 10.1103/PhysRevC.105.034311
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2019PE07      Phys.Rev. C 99, 024308 (2019)

J.E.Perez Velasquez, N.G.Kelkar, N.J.Upadhyay

Assessment of nonlocal nuclear potentials in α decay

RADIOACTIVITY 106Te, 144Nd, 168Pt, 180W, 210,212Po, 254Fm(α); calculated strong interaction potential between α particle and daughter nucleus, T1/2, percentage decrease in α decay half-lives using three different models (Mumbai, Sao Paulo and Perey-Buck) of nonlocality, and cluster preformation probability using non-local interaction with density-dependent double-folding model. Comparison with experimental values. Use of α-decay half-lives as a complementary tool for constraining the nonlocality models.

doi: 10.1103/PhysRevC.99.024308
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2018UP01      J.Phys.(London) G45, 015106 (2018)

N.J.Upadhyay, A.Bhagwat, B.K.Jain

A new treatment of nonlocality in scattering process

NUCLEAR REACTIONS 12C, 56Fe(n, n), E not given; calculated σ(θ).

doi: 10.1088/1361-6471/aa9877
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2018UP02      Phys.Rev. C 98, 024605 (2018)

N.J.Upadhyay, A.Bhagwat

Taylor approximation to treat nonlocality in the scattering process

NUCLEAR REACTIONS 24Mg, 40Ca, 100Mo, 208Pb(n, n), (n, n'), E<10 MeV; calculated total σ(E), differential σ(θ, E) using Taylor approximation to the radial wavefunction within the iterative mean value theorem (IMVT) scheme, with and without an iterative perturbation approach. Solution of integro-differential equation. Comparison with experimental values and results from the IMVT scheme.

doi: 10.1103/PhysRevC.98.024605
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2014UP02      Phys.Rev. C 90, 014615 (2014)

N.J.Upadhyay, V.Eremenko, L.Hlophe, F.M.Nunes, Ch.Elster, G.Arbanas, J.E.Escher, I.J.Thompson

Coulomb problem in momentum space without screening

NUCLEAR REACTIONS 2H(12C, p), E(cm)=30 MeV; 2H(48Ca, p), E(cm)=36 MeV; 2H(208Pb, p), E(cm)=36, 39 MeV; calculated Coulomb-distorted form factors for (d, p) reactions and dependence on charge, angular momentum, and energy. Regularization techniques using a separable interaction derived from realistic nucleon-nucleus optical potential

doi: 10.1103/PhysRevC.90.014615
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2013HL01      Phys.Rev. C 88, 064608 (2013)

L.Hlophe, Ch.Elster, R.C.Johnson, N.J.Upadhyay, F.M.Nunes, G.Arbanas, V.Eremenko, J.E.Escher, I.J.Thompson

Separable representation of phenomenological optical potentials of Woods-Saxon type

NUCLEAR REACTIONS 48Ca, 132Sn, 208Pb(n, X), E=0-50 MeV; calculated partial wave S matrices, separable representations of two-body transition matrix elements and potentials. Ernst-Shakin-Thaler (EST) scheme with CH89 potential.

doi: 10.1103/PhysRevC.88.064608
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2013SC25      Phys.Rev. C 88, 064612 (2013)

K.T.Schmitt, K.L.Jones, S.Ahn, D.W.Bardayan, A.Bey, J.C.Blackmon, S.M.Brown, K.Y.Chae, K.A.Chipps, J.A.Cizewski, K.I.Hahn, J.J.Kolata, R.L.Kozub, J.F.Liang, C.Matei, M.Matos, D.Matyas, B.Moazen, C.D.Nesaraja, F.M.Nunes, P.D.O'Malley, S.D.Pain, W.A.Peters, S.T.Pittman, A.Roberts, D.Shapira, J.F.Shriner, M.S.Smith, I.Spassova, D.W.Stracener, N.J.Upadhyay, A.N.Villano, G.L.Wilson

Reactions of a 10Be beam on proton and deuteron targets

NUCLEAR REACTIONS 2H(10Be, p), (10Be, d), 1H(10Be, p), E=60, 75, 90, 107 MeV; measured Ep, Ip, E(d), I(d), elastic and inelastic σ(θ, E) using SIDAR, ORRUBA, and SuperORRUBA arrays of particle detectors at HRIBF-ORNL facility. 11Be; deduced levels, and spectroscopic factors for halo nucleus. Finite-range adiabatic wave approximation (FR-ADWA) analysis.

doi: 10.1103/PhysRevC.88.064612
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2088. Data from this article have been entered in the XUNDL database. For more information, click here.


2012UP01      Phys.Rev. C 85, 054621 (2012)

N.J.Upadhyay, A.Deltuva, F.M.Nunes

Testing the continuum-discretized coupled channels method for deuteron-induced reactions

NUCLEAR REACTIONS 10Be(d, d), (d, p), (d, np), E=21.4, 40.9, 71 MeV; 12C(d, d), (d, p), (d, np), E=12, 56 MeV; 48Ca(d, d), (d, p), (d, np), E=56 MeV; calculated σ(E, θ) for elastic, transfer and breakup channels. Continuum-discretized coupled channels (CDCC) calculations. Comparison with exact three-body Faddeev formulation.

doi: 10.1103/PhysRevC.85.054621
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2010ME11      Phys.Rev. C 82, 034608 (2010)

G.Mehta Pandejee, N.J.Upadhyay, B.K.Jain

K- absorption at rest in nuclei followed by pΛ emission

doi: 10.1103/PhysRevC.82.034608
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2009UP01      Nucl.Phys. A824, 70 (2009)

N.J.Upadhyay, N.G.Kelkar, B.K.Jain

Eta meson rescattering effects in the p + 6Li → η + 7Be reaction near threshold

NUCLEAR REACTIONS 6Li(p, 7Be), E=658.8-683 MeV; calculated σ, σ(θ) using a cluster model and including final state interactions effects.

doi: 10.1016/j.nuclphysa.2009.03.010
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2007UP01      Phys.Rev. C 75, 054002 (2007)

N.J.Upadhyay, K.P.Khemchandani, B.K.Jain, N.G.Kelkar

Study of the pd → pdη reaction

doi: 10.1103/PhysRevC.75.054002
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