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NSR database version of April 27, 2024.

Search: Author = C.Lahiri

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2023GU13      Phys.Rev. C 108, 015805 (2023)

A.Gupta, C.Lahiri, S.Sarkar

Allowed β^- decay of bare atoms with A ≈ 60 - 80 in stellar environments

RADIOACTIVITY ⁵⁹Fe, ^60,61Co, ^63,65,66Ni, ^64,66,67Cu, ^69,72Zn, ⁷⁰Ga, ^75,78Ge, ⁸¹Se(β^-); calculated decay rates, bound state decay rate, continuum state decay rate, logft, T_1/2, T_1/2 of bare atoms as functions of density and temperature in stellar S-process environment, ratio of neutral to bare atom half-life, branchings. ⁵⁹Fe, ⁶⁹Zn(β^-); calculated Gamow-Teller transition matrix elements, quenching factors. Shell model calculations. Comparison to available experimental data.

NUCLEAR STRUCTURE ⁵⁹Fe, ⁵⁹Co, ⁶⁹Zn, ⁶⁹Ga, ⁷⁸Ge, ⁷⁸As; calculated levels, J, π. Shell-model calculations with fpd6, fpd6n and jun45 interactions. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.015805
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2019GU33      Phys.Rev. C 100, 064313 (2019)

A.Gupta, C.Lahiri, S.Sarkar

Bound and continuum state β^- decay of bare atoms: Enhancement of decay rate and changes in β^- decay branching

RADIOACTIVITY ^63,66Ni, ^85,85mKr, ⁹³Zr, ^95,95mNb, ⁹⁹Tc, ¹⁰⁶Ru, ¹⁰⁷Pd, ¹¹⁰Ag, ^113,115Cd, ^{121,121m,123,123m}Sn, ¹²⁴Sb, ^134,136Cs, ^148,148mPm, ¹⁵¹Sm, ^152,152m,155Eu, ¹⁷¹Tm, ¹⁹¹Os, ²⁰⁷Tl, ²¹⁰Pb, ²²⁷Ac, ²²⁸Ra, ²⁴¹Pu(β^-); calculated β-decay half-lives for the fully-ionized (bare) ions, logft, individual contributions to β^--decay rates for bound and continuum states in neutral atoms and fully-ionized (bare) ions; deduced that transition branchings for the bare atom differ from that of the neutral atom for all Z and A in A=60-240 mass region. Comparison with experimental values of half-lives for neutral atoms in the NNDC databases, and with theoretical values from 1987Ta16.

doi: 10.1103/PhysRevC.100.064313
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2016KU04      Int.J.Mod.Phys. E25, 1650020 (2016)

B.Kumar, S.K.Biswal, S.K.Singh, C.Lahiri, S.K.Patra

Modes of decay in neutron-rich nuclei

NUCLEAR STRUCTURE ²⁰⁸Pb, ^{232,234,236,238,240,254,256,258}Th, ^{230,232,234,236,248,250,252,254,256}U; calculated matter density distributions.

RADIOACTIVITY ^216,232,254Th, ^218,238,256U(α); calculated penetrability parameter using WKB approximation, T_1/2. Comparison with available data.

doi: 10.1142/S0218301316500208
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2016LA05      Int.J.Mod.Phys. E25, 1650015 (2016)

C.Lahiri, S.K.Biswal, S.K.Patra

Effects of NN potentials on p Nuclides in the A ∼ 100-120 region

NUCLEAR STRUCTURE A = 100-120; calculated S-factors, astrophysical reaction rates using microscopical optical model potential with the Hauser-Feshbach reaction code TALYS. Comparison with experimental data.

doi: 10.1142/S0218301316500154
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2016MA54      Int.J.Mod.Phys. E25, 1650062 (2016)

S.Mahapatro, C.Lahiri, B.Kumar, R.N.Mishra, S.K.Patra

Nuclear structure and decay properties of even-even nuclei in Z=70-80 drip-line region

NUCLEAR STRUCTURE ^{150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240}Yb, ^{152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242}Hf, ^{154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244}W, ^{156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246}Os, ^{158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248}Pt, ^{160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250}Hg; calculated binding energy, neutron, proton, charge rms radii, quadrupole moment and hexadecoupole deformation parameters. Comparison with FRDM calculations, experimental data.

doi: 10.1142/S0218301316500622
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2012LA11      Int.J.Mod.Phys. E21, 1250042 (2012)

C.Lahiri, G.Gangopadhyay

Neutron rich nuclei in a new binding energy formula and the astrophysical r-process

doi: 10.1142/S0218301312500425
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2012LA17      Int.J.Mod.Phys. E21, 1250074 (2012)

C.Lahiri, G.Gangopadhyay

Endpoint of rp process using relativistic mean field approach and a new mass formula

doi: 10.1142/S0218301312500747
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2012LA25      Phys.Rev. C 86, 047601 (2012)

C.Lahiri, G.Gangopadhyay

Low-energy proton reactions of astrophysical interest in the A∼90-100 region

NUCLEAR STRUCTURE ⁸⁹Y, ^90,92,94,96Zr, ^{92,94,95,96,98}Mo, ^96,98Ru; calculated charge radii. Comparison with evaluated experimental values. Relativistic mean field calculation.

NUCLEAR REACTIONS ^90,91,92Zr, ^92,94,96,98Mo(p, p), E=9.7, 14.8, 14.25 MeV; calculated elastic scattering cross section, σ(θ, E). ⁸⁹Y, ⁹⁶Zr, ^96,98,99Ru, ^92,94,95,98Mo(p, γ), ⁹³Nb(p, n), E(cm)=1-5 MeV; calculated astrophysical S factors. Density-dependent M3Y interaction with relativistic mean field densities. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.047601
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2011BH01      J.Phys.(London) G38, 035105 (2011)

S.Bhowal, C.Lahiri, R.Raut, P.Singh, M.K.Raju, A.Goswami, A.K.Singh, S.Bhattacharya, T.Bhattacharjee, G.Mukherjee, S.Bhattacharyya, S.Muralithar, R.K.Bhowmik, N.Madhavan, R.P.Singh, G.Gangopadhyay

Energy levels in ¹⁴¹Nd from fusion evaporation study

NUCLEAR REACTIONS ¹³⁰Te(¹⁶O, 5n)¹⁴¹Nd, E=80-85 MeV; ¹²⁴Sn(²⁴Mg, 3nα)¹⁴¹Nd, E=107 MeV; measured Eγ, Iγ; deduced level scheme, J, π, quadrupole band-like structure. Comparison with shell model calculations.

doi: 10.1088/0954-3899/38/3/035105
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2011LA14      Eur.Phys.J. A 47, 87 (2011)

C.Lahiri, G.Gangopadhyay

Microscopic calculation of proton capture reactions in the mass 60-80 region and its astrophysical implications

NUCLEAR REACTIONS ^62,64Ni, ^63,65Cu, ⁷⁰Ge, ^74,76,77Se, ^64,66,67,68Zn(p, γ), E(cm)=1.0-3.5 MeV; calculated S-factor using TALYS with HF+BCS and HFB. Comparison with data.

NUCLEAR STRUCTURE ⁶⁴Ge, ⁶⁸Se, ⁷⁶Sr, ⁷²Kr; calculated effective T_1/2 for temperatures 0.8-1.8 GK, densities above which the waiting points are bridged. TALYS with HF+BCS and HFB.

doi: 10.1140/epja/i2011-11087-2
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2011LA17      Phys.Rev. C 84, 057601 (2011)

C.Lahiri, G.Gangopadhyay

Relativistic mean field in A ≈ 80 nuclei and low-energy proton reactions

NUCLEAR STRUCTURE ^84,86,87,88Sr, ⁷⁵As, ⁷⁶Ge, ⁸⁵Rb; calculated binding energies and charge radii. ⁷⁶Ge, ⁸⁸Sr; calculated charge and compared with analyzed radii from electron scattering data. Relativistic mean-field (RMF+BCS) calculations.

NUCLEAR REACTIONS ^84,86,87,88Sr(p, γ), ⁷⁵As, ⁷⁶Ge, ⁸⁵Rb(p, n), E=1.5-4 MeV; calculated s factors using TALYS code and compared with experimental data. Microscopic nuclear interaction DDM3Y.

doi: 10.1103/PhysRevC.84.057601
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2011LA18      Int.J.Mod.Phys. E20, 2417 (2011)

C.Lahiri, G.Gangopadhyay

Proton dripline in a new formula for nuclear binding energy

NUCLEAR STRUCTURE N=18-123; calculated proton dripline; deduced formula. Comparison with experimental data.

doi: 10.1142/S0218301311020411
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