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2023KU03      J.Phys.(London) G50, 025106 (2023)

R.Kumar, R.Prajapat, M.Maiti

Facets of reaction mechanism in ⁶Li+¹⁸¹Ta system

NUCLEAR REACTIONS ¹⁸¹Ta(⁶Li, X)¹⁸³Os/¹⁸²Os/¹⁸³Re/¹⁸³Ta/¹⁸²Ta/¹⁸⁰Ta, E=4.5-7.1 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ. Comparison with EMPIRE-3.2.2, PACE4 calculations. The 14 UD BARC-TIFR Pelletron Accelerator facility in Mumbai, India.

doi: 10.1088/1361-6471/acaffc
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2023PR09      Phys.Rev. C 107, 064616 (2023)

R.Prajapat, M.Maiti, R.Kumar, M.Sagwal, Gonika, C.Kumar, R.Biswas, J.Gehlot, S.Nath, N.Madhavan

Investigation of the role of neutron transfer and fusion hindrance in ²⁸Si + ¹⁵⁸Gd at deep sub-barrier energies

NUCLEAR REACTIONS ¹⁵⁸Gd(²⁸Si, X), E=107-140 MeV; measured reaction products, evaporation residues; deduced fusion σ(E), fusion excitation functions, fusion barrier distribution (BD), astrophysical S-factor, logarithmic derivatives, fusion hindrance threshold energy. Comparison of fusion excitation functions and BD of ²⁸Si+¹⁵⁸Gd with ³⁰Si+¹⁵⁶Gd reaction. Systematics of fusion hindrance threshold energy as a function of entrance channel parameter for systems ²⁸Si+¹⁵⁸Gd, ⁶⁴Ni+¹⁰⁰Mo, ⁶⁰No+⁸⁹Y, ⁶⁴Ni+⁶⁴Ni, ²⁸Si+³⁰Si, ²⁸Si+⁶⁴Ni, ¹¹B+¹⁹⁷Au, ¹²C+¹⁹⁸Pt, ¹⁶O+²⁰⁸Pb. Obtained cross-sections analyzed in the framework of CCFULL and ECC. Compared with theoretical model calculations. Recoil mass spectrometer HIRA at 15 UD Pelletron accelerator facility (IUAC, New Delhi).

doi: 10.1103/PhysRevC.107.064616
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2022KO03      Phys.Rev. C 105, 014607 (2022)

E.M.Kozulin, G.N.Knyazheva, I.M.Itkis, M.G.Itkis, Y.S.Mukhamejanov, A.A.Bogachev, K.V.Novikov, V.V.Kirakosyan, D.Kumar, T.Banerjee, M.Cheralu, M.Maiti, R.Prajapat, R.Kumar, G.Sarkar, W.H.Trzaska, A.N.Andreyev, I.M.Harca, A.Mitu, E.Vardaci

Fission of ^{180, 182, 183}Hg^* and ¹⁷⁸Pt^* nuclei at intermediate excitation energies

NUCLEAR REACTIONS ¹⁴²Nd(³⁶Ar, F)¹⁷⁸Pt^*, E=158, 169, 181 MeV; ¹⁴⁴Sm(³⁶Ar, F)¹⁸⁰Hg^*, E=158, 181 MeV; ^142,143Nd(⁴⁰Ca, F)¹⁸²Hg^*/¹⁸³Hg^*, E=158, 169, 181 MeV; measured binary reaction products in coincidence mode using the double-arm time-of-flight spectrometer CORSET, consisting of a compact start detector and a position-sensitive stop detector of microchannel plates at the U400 cyclotron Flerov laboratory of Nuclear Reactions, Dubna; deduced mass-energy distributions of fission fragments at energies near and above the Coulomb barrier, mass-total kinetic energy (M-TKE) distribution contours of primary binary fragments, mass yields, fission fragments mass yields, asymmetric fission of preactinide nuclei, existence of well-deformed proton shell at Z≈36 and a less deformed proton shell at Z≈46. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.105.014607
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2022PR05      Phys.Rev. C 105, 064612 (2022)

R.Prajapat, M.Maiti, R.Kumar, M.Sagwal, Gonika, C.Kumar, R.Biswas, J.Gehlot, S.Nath, N.Madhavan

Fusion and back-angle quasielastic measurements in ³⁰Si + ¹⁵⁶Gd near the Coulomb barrier

NUCLEAR REACTIONS ¹⁵⁶Gd(³⁰Si, X), (³⁰Si, ³⁰Si'), E=108-136 MeV; measured reaction products, evaporation residues; deduced fusion σ(Ε), quasielastic scattering σ(θ) fusion barrier distribution, fusion excitation function, quasielastic scattering excitation function, Analysis within the framework of coupled channel predictions using CCFULL and ECC model codes. Comparison to other experimental data and one-dimensional barrier penetration model (1DBPM) calculations. Recoil mass spectrometer - the heavy ion reaction analyzer (HIRA) combined with MWPC and SSSD detectors at 15UD Pelletron accelerator facility at the Inter-University Accelerator Center (IUAC), New Delhi.

doi: 10.1103/PhysRevC.105.064612
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6436.

2021BO22      Phys.Rev. C 104, 024623 (2021)

A.A.Bogachev, E.M.Kozulin, G.N.Knyazheva, I.M.Itkis, M.G.Itkis, K.V.Novikov, D.Kumar, T.Banerjee, I.N.Diatlov, M.Cheralu, V.V.Kirakosyan, Y.S.Mukhamejanov, A.N.Pan, I.V.Pchelintsev, R.S.Tikhomirov, I.V.Vorobiev, M.Maiti, R.Prajapat, R.Kumar, G.Sarkar, W.H.Trzaska, A.N.Andreyev, I.M.Harca, E.Vardaci

Asymmetric and symmetric fission of excited nuclei of ^{180, 190}Hg and ^{184, 192, 202}Pb formed in the reactions with ³⁶Ar and ^{40, 48}Ca ions

NUCLEAR REACTIONS ¹⁴⁴Sm(³⁶Ar, X)¹⁸⁰Hg^*, E=158, 181 MeV; ¹⁵⁴Sm(³⁶Ar, X)¹⁹⁰Hg^*, E=158, 181 MeV; ¹⁴⁴Sm(⁴⁰Ca, X)¹⁸⁴Pb^*, E=180, 190 MeV; ¹⁴⁴Sm(⁴⁸Ca, X)¹⁹²Pb^*, E=182, 188, 202 MeV; ¹⁵⁴Sm(⁴⁸Ca, X)²⁰²Pb^*, E=173, 183, 194 MeV; measured binary reaction products in coincidence mode from the excited states of the compound nuclei using the double-arm time-of-flight spectrometer CORSET at the U400 cyclotron facility of Flerov Laboratory of Nuclear Reactions (FLNR), Dubna; deduced mass-total kinetic energy (TKE) distributions of binary fragments, mass and TKE distributions of fission fragments, contributions of symmetric and asymmetric fissions, well deformed proton shell at Z≈36 and less deformed proton shell at Z≈46.

doi: 10.1103/PhysRevC.104.024623
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2021KU16      Eur.Phys.J. A 57, 209 (2021)

R.Kumar, M.Maiti, G.Sarkar, M.Sagwal, P.Kaur, R.Prajapat, T.N.Nag, S.Sodaye

Study of excitation functions and insights into the reaction mechanisms of ⁶Li fusion in Cu

NUCLEAR REACTIONS Cu(⁶Li, X)⁶⁶Ge/⁶⁷Ge/⁶⁹Ge/⁶⁵Ga/⁶⁶Ga/⁶⁷Ga/⁶⁸Ga/⁶²Zn/⁶³Zn/⁶⁵Zn, E=3.6-7.1 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ. Comparison with PACE4, EMPIRE-3.2.2 and ALICE20 calculations.

doi: 10.1140/epja/s10050-021-00520-w
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6401.

2021KU18      Phys.Rev. C 104, 014602 (2021)

D.Kumar, M.Maiti, R.Prajapat, A.Chauhan, R.Biswas, J.Gehlot, S.Nath, R.Kumar, N.Madhavan, G.N.Jyothi, R.N.Sahoo, M.M.Shaikh, V.Srivastava

Analysis of mass-separated evaporation residues formed in ³²S + ^{70, 68}Zn fusion reactions: The special case of ^{97, 95}Ru

NUCLEAR REACTIONS ⁶⁸Zn(³²S, X), E=130-150 MeV; ⁷⁰Zn(³²S, X), E=115-135 MeV; measured produced evaporation residues (ERs) transported to the focal plane of HIRA detector array and a multiwire proportional counter (MWPC), Eγ, Iγ from the radioactive ERs at the 15 UD Pelletron facility of the Inter-University Accelerator Centre (IUAC), New Delhi; ^95mTc, ^97,97m,98Rh, ^97m,98Ru; measured γ-ray spectra from the decays of the produced ERs; deduced two-dimensional ΔE vs X-position matrices of different mass product, yields of evaporation residues and compared with theoretical yields using semimicroscopic Monte Carlo code TERS. ^95,97Ru; deduced maximum production yields.

doi: 10.1103/PhysRevC.104.014602
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2021KU32      Bull.Rus.Acad.Sci.Phys. 85, 1479 (2021)

D.Kumar, E.M.Kozulin, G.N.Knyazheva, M.Maiti, I.M.Itkis, A.A.Bogachev, K.V.Novikov, M.Cheralu, T.Banerjee, I.N.Diatlov, N.I.Kozulina, I.V.Pchelintsev, I.V.Vorobiev, A.N.Pan, R.Prajapat, R.Kumar, E.Vardaci, W.H.Trzaska, A.Andreyev, I.M.Harca

Investigation on Competing Fission Modes in ¹⁷⁸Pt^* Produced by ³⁶Ar + ¹⁴²Nd Reaction up to High Excitation Energies

NUCLEAR REACTIONS ¹⁴²Nd(³⁶Ar, X)¹⁷⁸Pt, E=158-222 MeV; measured fission products, TOF; deduced mass-energy distributions of binary fission fragments, total kinetic energies, asymmetric and symmetric modes. Comparison with theoretical systematics. The double arm time-of-flight spectrometer CORSET.

doi: 10.3103/S1062873821120194
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2021PR01      Phys.Rev. C 103, 014608 (2021)

R.Prajapat, M.Maiti, D.Kumar

Fusion-fission events in the ¹¹B + ¹⁸¹Ta reaction up to 5.7 MeV/nucleon energy

NUCLEAR REACTIONS ¹⁸¹Ta(¹¹B, 6n)¹⁸⁶Pt, (¹¹B, 5n)¹⁸⁷Pt, (¹¹B, 4n)¹⁸⁸Pt, (¹¹B, 3n)¹⁸⁹Pt, (¹¹B, 5np)¹⁸⁶Ir/^186mIr, (¹¹B, 4np)¹⁸⁷Ir, (¹¹B, 3np)¹⁸⁸Ir, (¹¹B, 5nα)^183mOs, (¹¹B, F)²⁴Na/^34mCl/⁶⁶Ge/^74mBr/⁸³Br/⁷⁷Kr/^87mSr/⁹⁰Mo/^97mRh/¹⁰³Cd/¹⁰⁸In/¹⁰⁹In/^110mIn/¹¹⁵Ag/¹²³Xe/¹²⁹Sb/¹³⁰Sb/¹³¹La/¹³⁷Nd/^139mNd/¹⁴⁹Nd/^160mHo, E=53.5, 54.9, 56.6, 58.7, 59.6, 62.4 MeV; measured activation σ(E) by off-line Eγ, Iγ measurements at 14UD BARC-TIFR Pelletron facility; deduced σ(E) of residues and fission fragments, complete and incomplete fusion evaporation σ(E), isotopic, isobaric and isomeric yields as function of beam energy, isomeric cross-section ratios, preequilibrium (PEQ) reaction strength in ¹⁸¹Ta(¹¹B, 3n)¹⁸⁹Pt, and compared with experimental data for other reaction systems. Comparison with theoretical calculations using statistical model codes EMPIRE3.2.2, and PACE4. Comparison of measured isotopic yield distributions for ¹⁸¹Ta, ²³²Th, ²³⁸U(¹¹B, F), ¹⁸¹Ta(¹⁶O, F), ¹⁶⁹Tm(¹⁹F, F), and ²³⁸U(²²Ne, F). Comparison of measured reduced fusion excitation functions for ¹⁵⁹Tb, ¹⁸¹Ta, ²⁰⁹Bi(¹¹B, X), ¹⁵⁹Tb, ¹⁸¹Ta(¹²C, X), and ^174,176Yb(¹⁶O, X).

doi: 10.1103/PhysRevC.103.014608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6396.

2021PR04      Phys.Rev. C 103, 034620 (2021)

R.Prajapat, M.Maiti

Probing the influence of incomplete fusion in the ⁶Li + ⁸⁹Y reaction up to 7.2 MeV/nucleon energy

NUCLEAR REACTIONS ⁸⁹Y(⁶Li, 2n)^93mMo, (⁶Li, 4n)⁹¹Mo, (⁶Li, 5n), ⁹⁰Mo, (⁶Li, 2np)^92mNb, (⁶Li, 4np)⁹⁰Nb, (⁶Li, 2nα)^89mZr/⁸⁹Zr, (⁶Li, 3nα)⁸⁸Zr, (⁶Li, pα)^90mY, (⁶Li, 3npα)^87mY, (⁶Li, 2α)^87mSr, E=23-43 MeV; measured Eγ, Iγ, σ(E) by off-line γ-spectrometry at the 14UD BARC-TIFR Pelletron facility. ^87mSr, ^89,89mZr, ^90mY, ^90,92mNb, ^93mMo; measured activity and half-lives of their decays at E(⁶Li)=23.8 MeV for ^93mMo, ^90mY, 33.5 MeV for ^93mMo, ^90,92mNb, and 42.7 MeV for ^89,89mZr, ^87mSr. Comparison with theoretical cross-sections in the framework of EMPIRE3.2.2, and fusion l-distribution using CCFULL code; estimated complete fusion (CF) σ(E), incomplete fusion (ICF) σ(E) in α-emitting channels, and strength of incomplete fusion (FICF).

doi: 10.1103/PhysRevC.103.034620
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6399.

2020CH47      Phys.Rev. C 102, 064606 (2020)

A.Chauhan, R.Prajapat, G.Sarkar, M.Maiti, R.Kumar, Malvika, Gonika, J.Gehlot, S.Nath, A.Parihari, N.Madhavan

Evaporation residue cross section in the ³⁷Cl + ⁶⁸Zn fusion reaction near the Coulomb barrier

NUCLEAR REACTIONS ⁶⁸Zn(³⁷Cl, X), (³⁷Cl, 4n)¹⁰¹Ag, (³⁷Cl, 5n)¹⁰⁰Ag, (³⁷Cl, 3np)¹⁰¹Pd, (³⁷Cl, 4np)¹⁰⁰Pd, (³⁷Cl, 5np)⁹⁹Pd, (³⁷Cl, nα)¹⁰⁰Rh, (³⁷Cl, 2nα)⁹⁹Rh, (³⁷Cl, 3nα)⁹⁸Rh, (³⁷Cl, 4nα)⁹⁷Rh, (³⁷Cl, 2npα)⁹⁸Ru, (³⁷Cl, 3npα)⁹⁷Ru, E=94.8-138.9 MeV; measured recoiling evaporation residues (ERs), time-of-flight using the recoil mass spectrometer HIRA at the 15UD Pelletron accelerator facility of IUAC-New Delhi; deduced two-dimensional mass spectrum, fusion σ(E), total ER σ(E) for the production of individual residual nuclei, fragmentation potentials. Comparison with theoretical calculations using CCFULL code for coupled channel model, PACE4 code for statistical model, DCM code for non-statistical model.

doi: 10.1103/PhysRevC.102.064606
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6393.

2020KU24      Bull.Rus.Acad.Sci.Phys. 84, 1001 (2020)

D.Kumar, E.M.Kozulin, M.Cheralu, G.N.Knyazheva, I.M.Itkis, M.G.Itkis, K.V.Novikov, A.A.Bogachev, N.I.Kozulina, I.N.Diatlov, I.V.Pchelintsev, I.V.Vorobiev, T.Banerjee, Y.S.Mukhamejanov, A.N.Pan, V.V.Saiko, P.P.Singh, R.N.Sahoo, A.N.Andreyev, D.M.Filipescu, M.Maiti, R.Prajapat, R.Kumar

Study of Mass-Asymmetric Fission of ^{180, 190}Hg Formed in the ³⁶Ar + ^{144, 154}Sm Reactions

NUCLEAR REACTIONS ³⁶Ar(¹⁴⁴Sm, X), (¹⁵⁴Sm, X)¹⁸⁰Hg/¹⁹⁰Hg, E= 158, 181, 222 MeV; measured reaction products; deduced asymmetric fission of ^180,190Hg with the most probable masses of light and heavy fragments of 79 and 101 amu, and 84 and 106 amu, respectively. Two components manifesting the symmetric and asymmetric fission modes are observed in the kinetic energy distributions.

doi: 10.3103/S1062873820080213
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2020PR02      Phys.Rev. C 101, 024608 (2020)

R.Prajapat, M.Maiti

Measurement of residual cross sections in the ⁷Li + ⁸⁹Y reaction up to 5.7 MeV/nucleon and analysis of fusion mechanisms

NUCLEAR REACTIONS ⁸⁹Y(⁷Li, 3n)^93mMo, (⁷Li, 3np)^92mNb, (⁷Li, 3nα)⁸⁹Zr, (⁷Li, pα)^91mY, (⁷Li, npα)^90mY, E=19-40 MeV; measured Eγ, Iγ, σ(E) by off-line γ-spectrometry at the 14UD BARC-TIFR Pelletron facility; deduced complete fusion (CF) and incomplete fusion (ICF) cross sections, ICF strength fraction using the present and earlier data. Comparison with predictions of equilibrium and pre-equilibrium reaction models using EMPIRE3.2.2 and ALICE19 codes.

doi: 10.1103/PhysRevC.101.024608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6380.

2020PR05      Phys.Rev. C 101, 064620 (2020)

R.Prajapat, M.Maiti

Analysis of the dynamics of ⁷Li-induced fusion with ^natZr up to 44 MeV

NUCLEAR REACTIONS Zr(⁷Li, X)⁹⁶Tc/⁹⁵Tc/^95mTc/⁹⁴Tc/^94mTc/⁹³Tc/^93mTc/^93mMo/⁹⁶Nb/⁹⁰Nb, E=28-44 MeV; measured Eγ, Iγ, complete fusion (CF) and incomplete fusion (ICF) σ(E) for reaction residues using offline γ-spectrometry using HPGe detector at 14UD BARC-TIFR Pelletron facility; deduced isomeric cross section ratios (ICR). Comparison with theoretical predictions using EMPIRE3.2 and CCFULL codes, and with previous experimental cross sections.

doi: 10.1103/PhysRevC.101.064620
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