NSR Query Results
Output year order : Descending NSR database version of April 25, 2024. Search: Author = Krishichayan Found 66 matches. 2023AY02 Phys.Rev. C 107, 044314 (2023) A.D.Ayangeakaa, R.V.F.Janssens, S.Zhu, J.M.Allmond, B.A.Brown, C.Y.Wu, M.Albers, K.Auranen, B.Bucher, M.P.Carpenter, P.Chowdhury, D.Cline, H.L.Crawford, P.Fallon, A.M.Forney, A.Gade, D.J.Hartley, A.B.Hayes, J.Henderson, F.G.Kondev, Krishichayan, T.Lauritsen, J.Li, D.Little, A.O.Macchiavelli, D.Rhodes, D.Seweryniak, S.M.Stolze, W.B.Walters, J.Wu Triaxiality and the nature of low-energy excitations in 76Ge NUCLEAR REACTIONS 208Pb(76Ge, 76Ge'), E=291, 304, 317 MeV; measured Eγ, Iγ, (76Ge)γ-coin using the GRETINA array with 28 Ge crystals in one experiment at 304-MeV beam energy, and 42 Ge crystals in a second experiment at 291- and 317-MeV beam energies, both in coincidence with scattered particles detected by using the CHICO2 array of position-sensitive parallel plate avalanche counters at the ATLAS-ANL facility. 76Ge; deduced levels, Jπ, γ-ray and Coulomb excitation yields analyzed by using the semiclassical, coupled-channel, Coulomb excitation least-squares code GOSIA, constrained by certain previouly known experimental nuclear structure parameters, E2, M1, E1 and E3 matrix elements, B(E2), B(M1), B(E1) and B(E3), spectroscopic quadrupole moments for five excited states, and evidence for rigid triaxial deformation at low excitation energies in 76Ge, and magnitudes of the quadrupole invariants Q+2, and expectation values of the quadrupole asymmetry parameters cos(3γ) for the members of the ground-state and the γ bands. Comparison with configuration interaction shell-model calculations and generalized triaxial rotor model, and with previous experimental data.
doi: 10.1103/PhysRevC.107.044314
2023JO08 Phys.Rev. C 108, 024315 (2023) S.R.Johnson, R.V.F.Janssens, U.Friman-Gayer, B.A.Brown, B.P.Crider, S.W.Finch, Krishichayan, D.R.Little, S.Mukhopadhyay, E.E.Peters, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow, S.W.Yates Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in 74Ge NUCLEAR REACTIONS 74Ge(polarized γ, γ'), E=3.1-5.44 MeV; measured Eγ, Iγ, γ(θ); deduced integrated exclusive scattering σ(E). 74Ge; deduced levels, J, π, branching ratios, transition intensities. Comparison to large-scale shell-model calculations with jj44b and JUN45 effective interactions. γ3-setup consisting of 6 HPGe detectors. Quasi-monoenergetic linearly polarized photon beams produced via Compton backscattering and provided by the High Intensity Gamma-Ray Source at TUNL.
doi: 10.1103/PhysRevC.108.024315
2023MA16 Appl.Radiat.Isot. 195, 110742 (2023) A.M.Marenco, G.Rusev, E.M.Bond, T.A.Bredeweg, S.W.Finch, J.R.Garcia, M.E.Gooden, Krishichayan, R.C.Malone, W.A.Moody, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow Cross section for inelastic neutron scattering from 193Ir at 6 MeV NUCLEAR REACTIONS 193Ir, Ir(n, n')193mIr, E=6 MeV; measured reaction products, X-rays; deduced σ. Comparison with available data, ENDF/B-VIII.0 library. The tandem lab of TUNL.
doi: 10.1016/j.apradiso.2023.110742
2023MO15 Phys.Rev. C 107, 064320 (2023) A.K.Mondal, A.Chakraborty, K.Mandal, U.S.Ghosh, A.Dey, S.Biswas, B.Mukherjee, Krishichayan, S.Chatteerjee, S.K.Das, S.Samanta, R.Raut, S.S.Ghugre, S.Mukhopadhyay, S.Rajbanshi, R.Banik, S.Bhattacharyya, S.Nandi, S.Chakraborty, S.Bhattacharya, G.Mukherjee, S.Ali, A.Goswami, R.Chakrabarti, A.Kumar, R.Goswami Investigation of the low- and medium-spin level structure in 77As NUCLEAR REACTIONS 76Ge(α, 2np), E=40 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ). 77As; deduced levels, J, π, δ, high-spin states, polarization asymmetries, γ-rays deexcitation from the oriented states (DCO) ratio, configurations, band crossing, kinematic and dynamic moments of inertia, neutron alignments, rotational and vibrational bands structure. Observed large signature splitting of the signature partner bands. Presented evidence for the possible onset of stapler like mechanism in the high-lying negative-parity dipole band. Comparison to shell-model (JUN45, jj44b interactions) and particle plus triaxial-rotor model (TPRM) calculations. Indian National Gamma Array (INGA) spectrometer comprising 6 Clover and 1 LEPS detectors at K-130 Cyclotron of the Variable Energy Cyclotron Centre (VECC, Kolkata).
doi: 10.1103/PhysRevC.107.064320
2023RA05 Phys.Rev. C 107, 054608 (2023) A.P.D.Ramirez, J.A.Silano, R.C.Malone, M.A.Stoyer, A.P.Tonchev, M.E.Gooden, J.B.Wilhelmy, S.W.Finch, C.R.Howell, Krishichayan, W.Tornow Fission product yields from the 238U(n, f) reaction at En = 4.6 MeV NUCLEAR REACTIONS 238U(n, F)86mKr/86Kr/88Kr/89Rb/91Sr/92Sr/94Y/97Nb/101Mo/104Tc/105Ru/129Sb/131Te/131Sb/133I/134Te/134I/135Xe/138Xe/138Cs/139Ba/141Ba/142Ba/142La/146Ce/146Pr/147Pr/84As/86Se/86Br/87Br/88Br/89Kr/90Kr/91Kr/91Rb/92Kr/93Kr/93Rb/93Sr/94Rb/94Sr/95Sr/96Sr/96mY/96Y/97mY/98Sr/98mY/99Zr/99Nb/100Y/100Zr/101Zr/101Nb/102Zr/103Tc/106Tc/130Sn/132Sn/133Sb/134mSb/135Te/136Te/136mI/137Xe/138I/139Xe/140Xe/140Cs/141Xe/142Cs/142Ba/143Cs/143Ba/144La/145Ce/148La, E=4.6 MeV; measured neutron time-of-flight, Eγ, Iγ; deduced cumulative fission product yields. Comparison to experimental and evaluated data from ENDF/B-VIII.0 and JEFF-3.3 libraries and with theoretical models using the GEF and FREYA codes. Cyclic activation technique using the RApid Belt-driven Irradiated Target Transfer System (RABITTS) at the 10 MV tandem Van de Graaff accelerator (TUNL).
doi: 10.1103/PhysRevC.107.054608
2022GR04 Phys.Rev. C 106, 014308 (2022) D.Gribble, C.Iliadis, R.V.F.Janssens, U.Friman-Gayer, Krishichayan, S.Finch Investigation of 11B and 40Ca levels at 8-9 MeV by nuclear resonance fluorescence NUCLEAR REACTIONS 11B, 40Ca(polarized γ, γ'), E=8-9 MeV nearly monoenergetic and linearly polarized photon beams from the HIγS facility at TUNL; measured Eγ, Iγ, γ(θ, pol) using three HPGe detectors. 11B, 40Ca; deduced levels, J, π, polarization asymmetries, and branching ratios. 11B; analyzed γ-ray multipolarity mixing ratios using (polarized γ, γ') data from the present experiment and those from 2009Ru04: Phys. Rev. C 79, 047601. Discussed relationship of different phase conventions in nuclear resonance fluorescence (NRF) experiments.
doi: 10.1103/PhysRevC.106.014308
2022MA17 Phys.Rev. C 105, 034328 (2022) K.Mandal, A.Chakraborty, A.K.Mondal, U.S.Ghosh, A.Dey, S.Biswas, B.Mukherjee, S.Rai, S.Chatterjee, S.K.Das, S.Samanta, R.Raut, S.S.Ghugre, S.Bhattacharyya, S.Nandi, S.Bhattacharya, G.Mukherjee, S.Ali, A.Goswami, S.Mukhopadhyay, Krishichayan, R.Banik, R.Chakrabarti, V.Kumar, A.Kumar Alignment effects in the medium-spin level structure of 78Se NUCLEAR REACTIONS 76Ge(α, 2n), E=30 MeV; measured Eγ, Iγ, γγ(θ), gγ∓coin. 78Se; deduced levels J, π, DCO, polarization asymmetry, multipolarity, rotational band structures, configurations, alignments, high-spin states; calculated total Routhian surface (TRS) contours in (β2, γ) plane. Pointed the evidences of triaxial shapes persistence in the higher spin regime. Systematics of crossing frequencies for Se isotopes. Indian National Gamma Array (INGA) together with one low-energy photon spectrometer (LEPS) at K-130 cyclotron of Variable Energy Cyclotron Centre, Kolkata (VECC).
doi: 10.1103/PhysRevC.105.034328
2022SA39 Phys.Rev. C 106, 044324 (2022) D.Savran, J.Isaak, R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, S.W.Finch, C.Fransen, U.Friman-Gayer, R.Gonzalez, E.Hoemann, R.V.F.Janssens, S.R.Johnson, M.D.Jones, J.Kleemann, Krishichayan, D.R.Little, D.O'Donnell, O.Papst, N.Pietralla, J.Sinclair, V.Werner, O.Wieland, J.Wilhelmy Model-independent determination of the dipole response of 66Zn using quasimonoenergetic and linearly polarized photon beams NUCLEAR REACTIONS 66Zn(polarized γ, γ'), E=5.6-9.9 MeV; measured Eγ, Iγ, γγ-coin; deduced elastic, inelastic and total photoabsorption σ(E), average ground-state branching ratio, ratio of M1 to E1 elastic σ(E). Comparison to other experimental results. γ3-detector setup consisting of HPGe and LaBr3:Ce detectors at HIγS facility of the TUNL at Duke University.
doi: 10.1103/PhysRevC.106.044324
2022TO13 Phys.Lett. B 835, 137576 (2022) W.Tornow, A.P.Tonchev, S.W.Finch, Krishichayan, X.B.Wang, A.C.Hayes, H.G.D.Yeomans, D.A.Newmark Neutral-current neutrino cross section and expected supernova signals for 40Ar from a three-fold increase in the magnetic dipole strength NUCLEAR REACTIONS 40Ar(γ, γ'), E=9.4-10.2 MeV; measured reaction products, Eγ, Iγ; calculated the neutral-current neutrino σ using shell model; deduced γ-ray energies, J, π, resonance parameters, B(M1), B(E1). The Nuclear Resonance Fluorescence (NRF) technique, the High-Intensity Gamma-Ray Source (HIγS) of the Triangle Universities Nuclear Laboratory (TUNL).
doi: 10.1016/j.physletb.2022.137576
2021FI02 Phys.Rev. C 103, 044609 (2021) S.W.Finch, M.Bhike, Krishichayan, J.Soter, W.Tornow 169Tm(n, 2n) 168Tm and 169Tm (n, 3n) 167Tm cross-section measurements from 15 to 21 MeV NUCLEAR REACTIONS 169Tm(n, 2n), (n, 3n)168Tm/167Tm, E=15-21 MeV; measured Eγ, Iγ, σ(E) by activation method using monoenergetic neutron beams produced in 3H(d, n), E=12 MeV reaction at the FN tandem accelerator facility at TUNL. Comparison with previous experimental data, and evaluations in ENDF/B-VIII.0. Relevance to reaction-in-flight neutron yields for example studying properties of d-t plasma created in inertial confinement fusion laser shots at the NIF-LLNL.
doi: 10.1103/PhysRevC.103.044609
2021ID01 Phys.Rev. C 103, 054302 (2021) K.E.Ide, T.Beck, V.Werner, M.Berger, S.W.Finch, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, O.Papst, N.Pietralla, D.Savran, W.Tornow, M.Weinert, J.Wiederhold, A.Zilges E2 decay characteristics of the M1 scissors mode of 152Sm NUCLEAR REACTIONS 152Sm(polarized γ, γ'), E=3 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) by nuclear resonance fluorescence (NRF) method using four HPGe detectors at the HIγS facility at TUNL. 152Sm; deduced levels, J, π, B(M1), B(E1), γ-branching ratios to the ground state and the first 2+ state, E2/M1 multipole mixing ratios, B(E2), summed scissors mode B(M1). Comparison with predictions of interacting boson model-2 (IBM-2); predicted energy and transition strength of the 2+ mixed-symmetry state.
doi: 10.1103/PhysRevC.103.054302
2021IS05 Phys.Rev. C 103, 044317 (2021) J.Isaak, D.Savran, B.Loher, T.Beck, U.Friman-Gayer, Krishichayan, N.Pietralla, V.Yu.Ponomarev, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger Dipole response in 128, 130Te below the neutron threshold NUCLEAR REACTIONS 128,130Te(γ, γ'), (polarized γ, γ'), E=6.0, 9.13 MeV for 128Te and 6.4, 8.5 MeV for 130Te from Darmstadt high-intensity photon beams (DHIPS), and 2.76-8.92 MeV for 128Te and 5.5-8.5 MeV for 130Te linearly polarized and quasimonochromatic photon beams from TUNL HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization). 128,130Te; deduced levels below the neutron threshold, pygmy dipole resonance (PDR), J, π, γ-branching ratios to the first excited 2+ states, Γ02/Γ, photoabsorption cross sections, B(E1), dominant 1- states. Comparison with predictions of quasiparticle phonon model. Detailed data for levels given in the Supplemental Material of the paper.
doi: 10.1103/PhysRevC.103.044317
2021KL04 Phys.Rev. C 104, L061302 (2021) J.Kleemann, T.Beck, U.Friman-Gayer, N.Pietralla, V.Werner, S.W.Finch, J.Kotila, Krishichayan, B.Loher, H.Pai, O.Papst, W.Tornow, M.Weinert, A.Zilges Majorana parameters of the interacting boson model of nuclear structure and their implication for 0νββ decay NUCLEAR REACTIONS 150Nd(polarized γ, γ'), E=2994 keV; 150Sm(polarized γ, γ'), E=3113 keV; measured Eγ, Iγ, γ(θ), γ(linear polarization) at the High Intensity γ-ray Source (HIγS) of Duke University. 150Sm, 150Nd; deduced γ-branching ratios from the 1+ scissors mode state to the first excited 0+ and second 2+ state in 150Nd, negative parity for the 3082-keV in 150Sm, J=1 level, in disagreement with positive parity assigned in the ENSDF database, and confirmed 1+ for the 2994-keV level in 150Nd; calculated positive-parity levels and B(M1) for 1+ scissors mode (SCM) states using IBM-2, and compared with experimental data in the ENSDF database. Relevance to 0νββ decay mode of 150Nd. RADIOACTIVITY 150Nd(2β-); calculated nuclear matrix elements (NMEs) for 0νββ decay to the g.s. and the first excited 0+ state in 150Sm using interacting boson model-2 (IBM-2), and compared with predictions of energy density-functional (EDF) method; deduced strong constraints for the Majorana parameters.
doi: 10.1103/PhysRevC.104.L061302
2021SC06 Phys.Rev. C 103, 024312 (2021) R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, D.Bemmerer, N.Benouaret, R.Beyer, M.Butterling, F.Fiedler, S.W.Finch, C.Fransen, U.Friman-Gayer, A.Frotscher, R.Gonzalez, M.Grieger, A.Hartmann, T.Hensel, E.Hoemann, H.Hoffmann, R.V.F.Janssens, S.Johnson, M.D.Jones, A.R.Junghans, N.Kelly, J.Kleemann, Krishichayan, D.R.Little, F.Ludwig, S.E.Muller, D.O'Donnell, O.Papst, E.Pirovano, J.Sinclair, M.P.Takacs, S.Turkat, S.Urlass, A.Wagner, V.Werner, O.Wieland, J.Wilhelmy Electric and magnetic dipole strength in 66Zn NUCLEAR REACTIONS 66Zn(γ, γ'), (polarized γ, γ'), E=7.5, 13.4, MeV unpolarized bremsstrahlung from γELBE facility, and E=4.3, 4.4, 4.55, 4.7, 4.85, 5.0, 5.15, 5.3, 5.45, 5.6, 5.75, 5.9, 6.1, 6.3, 6.5, 6.7, 6.9, 7.1, 7.3, 7.5, 7.7, 7.9, 8.15, 8.4, 8.65, 8.9, 9.15, 9.4, 9.65, 9.9 MeV quasimonoenergetic and linearly polarized photon beams from HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization) using four escape-suppressed HPGe detectors at γELBE and using two HPGe detectors at HIγS. 66Zn; deduced 128 J=1 levels up to 11.02 MeV excitation, pygmy dipole resonances (PDR), J, π, energy-integrated scattering σ, Γ02/Γ, photoabsorption σ, photon strength functions, B(M1). Comparison of measured photoabsorption cross sections with experimental values in 54Fe(γ, γ'), and with calculations using TALYS code as in the 2019 library, and from the three Lorentz functions (TLO). Comparison of B(M1) strengths with shell-model calculations using the jj44c Hamiltonian. Comparison of deduced photon strength functions with those from 64Ni(p, p'γ).
doi: 10.1103/PhysRevC.103.024312
2020BE22 Phys.Rev.Lett. 125, 092501 (2020) T.Beck, V.Werner, N.Pietralla, M.Bhike, N.Cooper, U.Friman-Gayer, J.Isaak, R.V.Jolos, J.Kleemann, Krishichayan, O.Papst, W.Tornow, C.Bernards, B.P.Crider, R.S.Ilieva, B.Loher, C.Mihai, F.Naqvi, S.Pascu, E.E.Peters, F.M.Prados-Estevez, T.J.Ross, D.Savran, J.R.Vanhoy, A.Zilges ΔK = 0 m1 Excitation Strength of the Well-Deformed Nucleus 164Dy from K Mixing NUCLEAR REACTIONS 164Dy(γ, γ'), E=3-3.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, B(M1), reduced relative decay-intensity ratios, excitation strengths.
doi: 10.1103/PhysRevLett.125.092501
2020MA37 Phys.Rev.Lett. 125, 102502 (2020) N.Marginean, D.Little, Y.Tsunoda, S.Leoni, R.V.F.Janssens, B.Fornal, T.Otsuka, C.Michelagnoli, L.Stan, F.C.L.Crespi, C.Costache, R.Lica, M.Sferrazza, A.Turturica, A.D.Ayangeakaa, K.Auranen, M.Barani, P.C.Bender, S.Bottoni, M.Boromiza, A.Bracco, S.Calinescu, C.M.Campbell, M.P.Carpenter, P.Chowdhury, M.Ciemala, N.Cieplicka-Orynczak, D.Cline, C.Clisu, H.L.Crawford, I.E.Dinescu, J.Dudouet, D.Filipescu, N.Florea, A.M.Forney, S.Fracassetti, A.Gade, I.Gheorghe, A.B.Hayes, I.Harca, J.Henderson, A.Ionescu, L.W.Iskra, M.Jentschel, F.Kandzia, Y.H.Kim, F.G.Kondev, G.Korschinek, U.Koster, Krishichayan, M.Krzysiek, T.Lauritsen, J.Li, R.Marginean, E.A.Maugeri, C.Mihai, R.E.Mihai, A.Mitu, P.Mutti, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, C.Petrone, C.Porzio, D.Rhodes, D.Seweryniak, D.Schumann, C.Sotty, S.M.Stolze, R.Suvaila, S.Toma, S.Ujeniuc, W.B.Walters, C.Y.Wu, J.Wu, S.Zhu, S.Ziliani Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction NUCLEAR REACTIONS 62Ni(18O, 16O), E=39 MeV; 65Cu(11B, 12C), E=26 MeV; 63Ni(n, γ), E thermal; measured reaction products, Eγ, Iγ; analyzed available data from multiple experiments. 64Ni; deduced γ-ray energies, J, π, B(E2). Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.125.102502
2020MO41 Phys.Rev. C 102, 064311 (2020) A.K.Mondal, A.Chakraborty, K.Mandal, U.S.Ghosh, An.Dey, S.Biswas, B.Mukherjee, S.Rai, Krishichayan, S.Chatterjee, S.K.Das, S.Samanta, R.Raut, S.S.Ghugre, S.Rajbanshi, R.Banik, S.Bhattacharyya, S.Nandi, S.Bhattacharya, G.Mukherjee, S.Ali, A.Goswami, R.Chakrabarti, S.Mukhopadhyay, A.K.Sinha, V.Kumar, A.Kumar Investigation of different possible excitation modes in neutron-rich 78As NUCLEAR REACTIONS 76Ge(α, np)78As, E=30, 35, 40 MeV; measured Eγ, Iγ, γγ-coin, excitation functions, γγ(θ)(DCO), γγ(linear polarization) using INGA array of six Compton-suppressed HPGe Clover detectors and one LEPS detector at the K-130 cyclotron facility of VECC-Kolkata. 78As; deduced levels, J, π, multipolarities, dipole bands, B(E2), B(M1)/B(E2) ratios, configurations, possible stapler structure of the dipole bands; calculated total Routhian surfaces for the dipole bands. Comparison with large-scale shell-model calculations using JUN45 and jj44b interactions.
doi: 10.1103/PhysRevC.102.064311
2020PA32 Phys.Rev. C 102, 034323 (2020) O.Papst, V.Werner, J.Isaak, N.Pietralla, T.Beck, C.Bernards, M.Bhike, N.Cooper, B.P.Crider, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, F.Naqvi, E.E.Peters, F.M.Prados-Estevez, R.S.Ilieva, T.J.Ross, D.Savran, W.Tornow, J.R.Vanhoy Photo response of 164Dy NUCLEAR REACTIONS 164Dy(polarized γ, γ'), E=4.0-7.7 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) using four HPGe detectors at the HIγS facility of TUNL. 164Dy; deduced levels, J, π, energy-integrated cross sections, widths, B(E1), B(M1), γ-branching ratios to the ground state and the first 2+ state, mean population ratios of the first and second 2+ states, and first 3+ state, photon strength function (PSF) and nuclear level density (NLD). Comparison with statistical model calculations.
doi: 10.1103/PhysRevC.102.034323
2020SC07 Phys.Rev. C 101, 064303 (2020) R.Schwengner, R.Massarczyk, R.Beyer, M.Bhike, B.A.Brown, Krishichayan, K.Sieja, W.Tornow, D.Bemmerer, M.Butterling, V.Derya, M.Dietz, F.Fiedler, U.Friman-Gayer, A.Frotscher, M.Grieger, A.Hartmann, A.R.Junghans, T.Kogler, F.Ludwig, B.Lutz, H.Pai, T.Szucs, M.P.Takacs, A.Wagner Electric and magnetic dipole strength in 54Fe NUCLEAR REACTIONS 54Fe(polarized γ, γ'), E=4.3-13.0 MeV; measured Eγ, Iγ, γ(θ), γ(polarization asymmetry), and integrated scattering cross sections, absolute photoabsorption σ(E) using HPGe detectors at the γELBE facility of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), and at the HIγS facility at TUNL. 54Fe; deduced levels, J, π, B(E1), B(M1). Comparison with shell-model predictions.
doi: 10.1103/PhysRevC.101.064303
2020SI09 Eur.Phys.J. A 56, 105 (2020) J.Sinclair, M.Scheck, S.W.Finch, Krishichayan, U.Friman-Gayer, W.Tornow, G.Battaglia, T.Beck, R.Chapman, M.M.R.Chishti, Ch.Fransen, R.Gonzales, E.Hoemann, J.Isaak, R.V.F.Janssens, D.A.Jaroszynski, S.Johnson, M.D.Jones, J.M.Keatings, N.Kelly, J.Kleemann, D.Little, B.Loher, K.R.Mashtakov, M.Muscher, D.O'Donnell, O.Papst, E.E.Peters, D.Savran, M.Schilling, R.Schwengner, P.Spagnoletti, M.Spieker, V.Werner, J.Wilhelmy, O.Wieland, S.W.Yates, A.Zilges Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes
doi: 10.1140/epja/s10050-020-00118-8
2020WI09 Phys.Rev. C 102, 044327 (2020) J.Wilhelmy, M.Muscher, G.Rusev, R.Schwengner, R.Beyer, M.Bhike, P.Erbacher, F.Fiedler, U.Friman-Gayer, J.Glorius, R.Greifenhagen, S.Hammer, T.Hensel, J.Isaak, A.R.Junghans, Krishichayan, B.Loher, S.E.Muller, N.Pietralla, S.Reinicke, D.Savran, P.Scholz, K.Sonnabend, T.Szucs, M.Tamkas, W.Tornow, S.Turkat, A.Wagner, A.Zilges Dipole response of 87Rb and its impact on the 86Rb (n, γ) 87Rb cross section NUCLEAR REACTIONS 87Rb(γ, γ'), E=8.2, 13.2 MeV bremsstrahlung beam; measured Eγ, Iγ, γ(θ) using four HPGe detectors at the γ-ELBE facility in Dresden. 87Rb(polarized γ, γ'), E=5.10, 5.30, 5.50, 5.75, 6.00, 6.25, 6.50, 6.75, 7.00, 7.25, 7.50, 7.80, 8.10, 8.40, 8.70, 9.00, 9.30, 9.60 MeV; measured Eγ, Iγ, azimuthal asymmetry using four LaBr3:Ce scintillators and four HPGe detectors at the HIγS facility of TUNL; deduced energy-integrated σ(excitation energy), γ-ray sum spectra, photoabsorption σ(E), E1-photon strength functions (PSFs), nuclear level densities (NLDs), Thomas-Reiche-Kuhn (TRK) sum rule. Comparison with QRPA calculations for PSFs, and microscopic Hartree-Fock-Bogolyubov calculations with Skyrme and Gogny forces for NLDs. 87Rb; deduced 256 discrete levels from 845 to 10005 keV, J, π, gΓ02/Γ, γ-ray branching ratios for selected levels, as listed in supplemental material. 86Rb(n, γ), kT=5-100 keV; deduced Maxwellian cross sections (MACSs) for different PSF and NLD inputs, and compared to data in KADoNiS database.
doi: 10.1103/PhysRevC.102.044327
2019AY04 Phys.Rev.Lett. 123, 102501 (2019) A.D.Ayangeakaa, R.V.F.Janssens, S.Zhu, D.Little, J.Henderson, C.Y.Wu, D.J.Hartley, M.Albers, K.Auranen, B.Bucher, M.P.Carpenter, P.Chowdhury, D.Cline, H.L.Crawford, P.Fallon, A.M.Forney, A.Gade, A.B.Hayes, F.G.Kondev, Krishichayan, T.Lauritsen, J.Li, A.O.Macchiavelli, D.Rhodes, D.Seweryniak, S.M.Stolze, W.B.Walters, J.Wu Evidence for Rigid Triaxial Deformation in 76Ge from a Model-Independent Analysis NUCLEAR REACTIONS 208Pb(76Ge, 76Ge'), E=304, 291, 317 MeV; measured reaction products, Eγ, Iγ. 76Ge; deduced γ-ray energies, E2 matrix elements, quadrupole asymmetry for bands, triaxial deformation.
doi: 10.1103/physrevlett.123.102501
2019BO16 Nucl.Phys. A992, 121612 (2019) G.Bonasera, S.Shlomo, D.H.Youngblood, Y.-W.Lui, Krishichayan, J.Button Isoscalar and isovector giant resonances in 92, 94, 96, 98, 100Mo and 90, 92, 94Zr NUCLEAR STRUCTURE 92,94,96,98,100Mo, 90,92,94Zr; calculated response function S(E), centroid energies ECEN of the isoscalar and isovector giant resonances of multipolarity, centroid energy vs nuclear matter incompressibility using spherical Hartree-Fock based RPA with Skyrme-type nucleon-nucleon interaction, difference between the centroid energies vs asymmetrycoefficient for each isotope I=(N-Z)/A, ECEN vs m*/m; compared with data; deduced nuclear matter properties, ECEN for ISGMR, for ISGDR, ISGOR, ISGQR, IVGMR, IVGDR, IVGQR.
doi: 10.1016/j.nuclphysa.2019.121612
2019IS02 Phys.Lett. B 788, 225 (2019) J.Isaak, D.Savran, B.Loher, T.Beck, M.Bhike, U.Gayer, Krishichayan, N.Pietralla, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger The concept of nuclear photon strength functions: A model-independent approach via (γ(pol), g'γ") reactions NUCLEAR REACTIONS 128Te(polarized γ, γ'γ'), E=3-9 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced lack of a unique photon strength function consistent with the uncertainties of the measurement.
doi: 10.1016/j.physletb.2018.11.038
2019KR10 Phys.Rev. C 100, 014608 (2019) Krishichayan, M.Bhike, C.R.Howell, A.P.Tonchev, W.Tornow Fission product yield measurements using monoenergetic photon beams NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F)84Br/85mKr/87Kr/88Kr/91Sr/92Sr/92Y/93Y/94Y/95Zr/97Zr/99Mo/103Ru/104Tc/105Ru/105Rh/115Cd/127Sb/128Sn/129Sb/130Sb/131Sb/131I/132Te/132Cs/133Te/133I/134Te/135I/136Cs/138Cs/139Ba/140Ba/141Ba/141Ce/142La/143Ce/146Pr/147Nd/149Nd/151Pm, E=13 MeV; measured fission fragments, Eγ, Iγ, fission product yields (FPY) using dual fission chamber for fission fragments and offline γ detection at TUNL-HIγS facility. Comparison with previous experimental neutron- and photon-induced fission product yields. RADIOACTIVITY 91,92Sr, 142La(β-)[from 235,238U, 239Pu(polarized γ, F), E=13 MeV at TUNL-HIγS facility]; measured half-lives of decay of 91Sr, 92Sr, and 142La, and compared with values from ENSDF database at NNDC.
doi: 10.1103/PhysRevC.100.014608
2019RI02 Phys.Rev. C 100, 021301R (2019) P.C.Ries, H.Pai, T.Beck, J.Beller, M.Bhike, V.Derya, U.Gayer, J.Isaak, B.Loher, Krishichayan, L.Mertes, N.Pietralla, C.Romig, D.Savran, M.Schilling, W.Tornow, S.Typel, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger Valence-shell dependence of the pygmy dipole resonance: E1 strength difference in 50, 54Cr NUCLEAR REACTIONS 50,54Cr(γ, γ'), (polarized γ, γ'), E=7.5, 9.5 MeV bremsstrahlung beam from Darmstadt, and 5.5-9.8 MeV Compton-scattered polarized beam from TUNL; measured Eγ, Iγ, azimuthal angular distributions, integrated cross sections using nuclear resonance fluorescence (NRF) method at the Darmstadt High Intensity Photon Setup (DHIPS), and at the High-Intensity γ-ray Source facility (HIγS) of TUNL. 50,54Cr; deduced levels, pygmy dipole resonances (PDR), J, π, widths of transitions to g.s., branching ratios, B(E1), B(M1), B(E2), Thomas-Reiche-Kuhn (TRK) energy-weighted sum rule for 50,52,54Cr; calculated neutron skin thicknesses for 48,49,50,51,52,53,54,55,56Cr.
doi: 10.1103/PhysRevC.100.021301
2019TA11 Nucl.Phys. A987, 79 (2019) M.Tamkas, E.Aciksoz, J.Isaak, T.Beck, N.Benouaret, M.Bhike, I.Boztosun, A.Durusoy, U.Gayer, Krishichayan, B.Loher, N.Pietralla, D.Savran, W.Tornow, V.Werner, A.Zilges, M.Zweidinger Low-lying dipole strength in the well-deformed nucleus 156Gd NUCLEAR REACTIONS 156Gd(γ, γ), E=7.1 MeV[bremsstrahlung end-point energy]; measured Eγ, Iγ using three HPGe with BGO active anti-Compton shield; deduced γ-ray energy spectra; 156Gd(polarized γ, γ), E=2.9-6.2 MeV[linearly polarized quasi-monochromatical photon beams from laser Compton backscattering]; measured Eγ, Iγ, γγ-coin at High Intensity γ-ray Source (HIγS) at TUNL; deduced γ-ray measured and deconvoluted energy spectra, asymmetries for observed single states and average asymmetry for each beam energy setting using deconvoluted spectra, expectation B(E1), B(M1) transition values; deduced, extracted photo absorption σγ vs E* and its decomposition to the gs and to the first excited state.
doi: 10.1016/j.nuclphysa.2019.03.014
2019TO04 Nucl.Instrum.Methods Phys.Res. A928, 79 (2019) W.Tornow, M.Bhike, S.W.Finch, Krishichayan Exploratory study of the 180mTa(γ, γ')180Ta reaction with mono-energetic low-energy photon beams at HIγS NUCLEAR REACTIONS 180mTa(γ, γ')180Ta, E=1.56-3.7 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with TALYS calculations. RADIOACTIVITY 180Ta(EC); measured decay products, X-rays; deduced γ-ray energies and intensities.
doi: 10.1016/j.nima.2019.03.036
2018KR03 Phys.Rev. C 98, 014608 (2018), Erratum Phys.Rev. C 107, 039906 (2023) Krishichayan, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow Monoenergetic photon-induced fission cross-section ratio measurements for 235U, 238U, and 239Pu from 9.0 to 17.0 MeV NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F), E=9.0-17.0 MeV; measured fission fragments, photofission σ(E), cross sections ratios for the target nuclei using dual-fission ionization chamber (DFC), and quasimonoenergetic Compton backscattered photon beam from HIγS facility of TUNL. Comparison with previous experimental values, with evaluated data in ENDF/B-VII.1 library, and with theoretical calculations using TENDL-2009 code.
doi: 10.1103/PhysRevC.98.014608
2018NE03 Phys.Rev. C 97, 044617 (2018) I.Newsome, M.Bhike, Krishichayan, W.Tornow Neutron radiative capture cross section of 63, 65Cu between 0.4 and 7.5 MeV NUCLEAR REACTIONS 63,65Cu(n, γ), E=0.4-7.5 MeV[neutrons from 3H(p, n) and 2H(d, n) reactions]; measured Eγ, Iγ, σ(E) by activation method at Triangle Universities Nuclear Laboratory (TUNL). Comparison with previous experimental values, and ENDF/B-VII.1 and ENDF/B-VIII.b5 evaluations and TALYS-model calculations TENDL-2015. 115In(n, γ), (n, n'), E=0.4-7.5 MeV; used as monitor reaction. 64,66Cu; measured decay half-lives from γ-decay curves, and compared with literature values.
doi: 10.1103/PhysRevC.97.044617
2018TO09 Phys.Rev. C 98, 064305 (2018) W.Tornow, M.Bhike, S.W.Finch, Krishichayan, A.P.Tonchev Measurement of the 115In (γ, γ') 115mIn inelastic scattering cross section in the 1.8 to 3.7 MeV energy range with monoenergetic photon beams NUCLEAR REACTIONS 115In(γ, γ')115mIn, E=1.8-3.7 MeV; measured Eγ, Iγ, σ(E) for the 336-keV isomer in 115In at the High-Intensity Gamma-ray Source (HIγS) of TUNL. Comparison with different TALYS-1.9 evaluations. 115In(γ, n), E=9-25 MeV; calculated σ(E) using TALYS-1.9 code with the default values and with the Gogny D1M HFB+QRPA model for the level density, E1 and M1 strengths.
doi: 10.1103/PhysRevC.98.064305
2018WI07 Phys.Rev. C 98, 034315 (2018) J.Wilhelmy, A.Brown, P.Erbacher, U.Gayer, J.Isaak, Krishichayan, B.Loher, M.Muscher, H.Pai, N.Pietralla, P.Ries, D.Savran, P.Scholz, M.Spieker, W.Tornow, V.Werner, A.Zilges Investigation of J=1 states and their γ-decay behavior in 52Cr NUCLEAR REACTIONS 52Cr(polarized γ, γ'), E=5.5-9.2 MeV; measured Eγ, Iγ of primary and secondary γ rays, energy integrated σ in nuclear resonance fluorescence (NRF) experiments using γ3 array at the HIγS-TUNL facility. 52Cr; deduced levels, J, π, Γ0, γ-branching ratios, B(M1), B(E1), summed M1 strength. Comparison with shell model calculations, and previous experimental results.
doi: 10.1103/PhysRevC.98.034315
2018YA23 Phys.Rev. C 98, 054621 (2018) S.A.Yates, B.Fallin, C.R.Howell, Krishichayan, W.Tornow, S.M.Grimes Measurement of the 80Se (γ, n) reaction with linearly polarized γ rays NUCLEAR REACTIONS 80Se(polarized γ, n), E=15.6, 15.8, 16.0 MeV; measured E(n), I(n), neutron time-of-flight, differential σ(E, θ), total σ, linear polarization using liquid-scintillation detectors for neutron detection at HIGS-TUNL facility; deduced reaction matrix elements; data analyzed using (γ, n) reaction angular correlation formalism. 79Se; deduced nuclear level density, GDR, nuclear level density model that fits the data best. Comparison with statistical model calculations using Hauser-Feshbach formalism, and with previous experimental values. Relevance to time reversed 79Se(n, γ) reaction, and s-process formation of 82Kr.
doi: 10.1103/PhysRevC.98.054621
2017BH03 Phys.Rev. C 95, 024608 (2017) M.Bhike, W.Tornow, Krishichayan, A.P.Tonchev Exploratory study of fission product yield determination from photofission of 239Pu at 11 MeV with monoenergetic photons NUCLEAR REACTIONS 239Pu(γ, F)91Sr/92Sr/97Zr/99Mo/133I/134I/138Cs/143Ce, E=11 MeV from Compton back-scattering of free electron laser (FEL) photons at TUNL High Intensity Gamma-Ray Source (HIγS); measured off-line Eγ, Iγ, cumulative fission product yields (FPYs). Comparison with experimental yields from neutron-induced fission and photon-induced fission for Eγ(max)=28 MeV.
doi: 10.1103/PhysRevC.95.024608
2017BH06 Phys.Rev. C 95, 054605 (2017) M.Bhike, Krishichayan, W.Tornow Total and isomeric-state cross sections for the 76Ge(n, 2n)75Ge reaction from threshold to 14.8 MeV NUCLEAR REACTIONS 76Ge(n, 2n)75Ge/75mGe, E=10-15 MeV; measured Eγ, Iγ, σ(E) by activation method, half-lives of 75Ge g.s. and isomer using 10-MV FN Tandem accelerator at TUNL. Comparison with previous experimental values, theoretical model calculations using TALYS code, and with evaluated data in TENDL-2014, JENDL-4.0 and ENDF/B-VII.1 libraries.
doi: 10.1103/PhysRevC.95.054605
2017GO11 Phys.Rev. C 96, 024622 (2017) M.E.Gooden, T.A.Bredeweg, B.Champine, D.C.Combs, S.Finch, A.Hayes-Sterbenz, E.Henry, Krishichayan, R.Rundberg, W.Tornow, J.Wilhelmy, C.Yeamans Measurement of the 209Bi(n, 4n)206Bi and 169Tm(n, 3n)167Tm cross sections between 23.5 and 30.5 MeV relevant to reaction-in-flight neutron studies at the National Ignition Facility NUCLEAR REACTIONS 209Bi(n, 4n), 169Tm(n, 3n), E=23.5, 24.9, 25.5, 26.5, 27.5, 28.5, 29.5, 30.5 MeV; measured neutron time-of-flight spectra, σ(E) at the FN tandem accelerator facility of Triangle Universities Nuclear Laboratory (TUNL). Comparison with previous experimental data, evaluated ENDF/B-VII.1, TENDL-2015 and EAF-2010 libraries, and theoretical calculations. Relevance to charged-particle stopping power measurements at the National Ignition Facility.
doi: 10.1103/PhysRevC.96.024622
2017KR02 Nucl.Instrum.Methods Phys.Res. A854, 40 (2017) Krishichayan, M.Bhike, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow Photofission cross-section ratio measurement of 235U/238U using monoenergetic photons in the energy range of 9.0-16.6 MeV NUCLEAR REACTIONS 235,238U(γ, F), E=9.0-16.6 MeV; measured fission fragments, Eγ, Iγ; deduced fission σ ratio. Comparison with experimental and ENDF/B-VII.1 evaluated data.
doi: 10.1016/j.nima.2017.02.043
2017KR09 Phys.Rev. C 96, 044623 (2017) Krishichayan, M.Bhike, W.Tornow, A.P.Tonchev, T.Kawano Accurate 238U (n, 2n) 237U reaction cross-section measurements from 6.5 to 14.8 MeV NUCLEAR REACTIONS 238U(n, 2n)237U, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40, 9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.8 MeV; 197Au(n, 2n)196Au, E=9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.80 MeV; 27Al(n, α)24Na, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40 MeV; measured Eγ, Iγ, σ(E) by activation method at the FN Tandem Accelerator of the Triangle Universities Nuclear Laboratory (TUNL). 237U, 196Au, 24Na; measured half-lives of the decays of the ground states from γ-decay curves, and compared with literature values. Comparison of cross section data with previous measurements, evaluated data in ENDF/B-VIII.b4, JEFF-3.2, JENDL-4.0, BROND-2.2, CENDL-3.1, ROSFOND-2010, Zolotarev and Zhou You-Pu libraries, and with Hauser-Feshbach model based theoretical calculation.
doi: 10.1103/PhysRevC.96.044623
2017SO26 Phys.Rev. C 96, 064619 (2017) J.Soter, M.Bhike, S.W.Finch, Krishichayan, W.Tornow Measurements of the 169Tm(n, 2n) cross section from threshold to 15 MeV NUCLEAR REACTIONS 169Tm(n, 2n), E=8.5-15 MeV; measured Eγ, Iγ, half-lives of 168Tm, σ(E) at TUNL tandem accelerator facility. Comparison with TENDL-2015 output of the TALYS calculation. 197Au(n, 2n), E=8.5-15 MeV; measured Eγ, Iγ, this reaction served as neutron flux monitor. Comparison with previous experimental data, and evaluated data in IRDF-2002, ENDF/B-VII.1, JENDL-4.0, and JEFF-3.2 libraries. Relevance to diagnostic tool for neutron energy distribution produced in inertial confinement deuterium-tritium fusion experiments at the National Ignition Facility (NIF).
doi: 10.1103/PhysRevC.96.064619
2016CH04 Phys.Rev. C 93, 014611 (2016) B.Champine, M.E.Gooden, Krishichayan, E.B.Norman, N.D.Scielzo, M.A.Stoyer, K.J.Thomas, A.P.Tonchev, W.Tornow, B.S.Wang Measurement of the 169Tm(n, 3n)167Tm cross section and the associated branching ratios in the decay of 167Tm NUCLEAR REACTIONS 169Tm(n, 3n), 58Ni, 90Zr, 169Tm(n, 2n), 94Zr(n, α), E=17.35, 18.34, 19.33, 20.32, 21.31 MeV, [quasimonoenergetic neutrons from 2H(d, n), E=15.0-19.2 at TUNL tandem Van de Graaff accelerator]; measured neutron spectra, Eγ, Iγ, σ(E) by activation method. Comparison with previous experimental data, compiled data in EXFOR database and evaluated data in ENDF database. Relevance to measurement of yield of reaction-in-flight neutrons at the LLNL National Ignition Facility (NIF). RADIOACTIVITY 167Tm(EC)[from 165Ho(α, 2n), E=29 MeV at LBNL cyclotron facility]; measured Eγ, Iγ, I(x rays), source activity; deduced branching ratios of 207.8-keV and 531.5-keV γ rays. Comparison with previous experimental values and evaluated data.
doi: 10.1103/PhysRevC.93.014611
2016GO02 Nucl.Data Sheets 131, 319 (2016) M.E.Gooden, C.W.Arnold, J.A.Becker, C.Bhatia, M.Bhike, E.M.Bond, T.A.Bredeweg, B.Fallin, M.M.Fowler, C.R.Howell, J.H.Kelley, Krishichayan, R.Macri, G.Rusev, C.Ryan, S.A.Sheets, M.A.Stoyer, A.P.Tonchev, W.Tornow, D.J.Vieira, J.B.Wilhelmy Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=0.5-14.8 MeV; measured reaction products, Eγ, Iγ; deduced fission yields.
doi: 10.1016/j.nds.2015.12.006
2016PA04 Phys.Rev. C 93, 014318 (2016) H.Pai, T.Beck, J.Beller, R.Beyer, M.Bhike, V.Derya, U.Gayer, J.Isaak, Krishichayan, J.Kvasil, B.Loher, V.O.Nesterenko, N.Pietralla, G.Martinez-Pinedo, L.Mertes, V.Yu.Ponomarev, P.-G.Reinhard, A.Repko, P.C.Ries, C.Romig, D.Savran, R.Schwengner, W.Tornow, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger Magnetic dipole excitations of 50Cr NUCLEAR REACTIONS 50Cr(γ, γ'), (polarized γ, γ'), E<9.7 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ), γ-polarization asymmetry, integrated σ, γ-branching ratios. Experiments performed at Darmstadt S-DALINAC and TUNL High Intensity γ-ray Source (HIγS) facilities. 50Cr; deduced levels, J, π, B(M1), reduced widths, configurations, M1 spin-flip transition. Discussed isovector rotation-like oscillations of 1+ states versus scissors-type mode. Comparison with Skyrme quasiparticle random-phase-approximation (QRPA) and the large-scale shell model (LSSM) calculations.
doi: 10.1103/PhysRevC.93.014318
2016PR06 Phys.Rev. C 94, 024311 (2016) D.Pramanik, S.Sarkar, M.S.Sarkar, A.Bisoi, S.Ray, S.Dasgupta, A.Chakraborty, Krishichayan, R.Kshetri, I.Ray, S.Ganguly, M.K.Pradhan, M.R.Basu, R.Raut, G.Ganguly, S.S.Ghugre, A.K.Sinha, S.K.Basu, S.Bhattacharya, A.Mukherjee, P.Banerjee, A.Goswami Shape coexistence in 153Ho NUCLEAR REACTIONS 139La(20Ne, 6n), E=139 MeV; measured Eγ, Iγ, delayed Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization), half-life of an isomer by RF-γ(t) using INGA array at VECC cyclotron facility. 153Ho; deduced high-spin levels, J, π, multipolarity, mixing ratio, B(E2), indication of shape coexistence, alignment plots, energy versus angular momentum plots. TRS calculations. Comparison with theoretical calculations using particle-rotor model.
doi: 10.1103/PhysRevC.94.024311
2016TO01 Phys.Rev. C 93, 014614 (2016) W.Tornow, M.Bhike, B.Fallin, Krishichayan Fast-neutron-induced potential background near the Q value of neutrinoless double-β decay of 76Ge RADIOACTIVITY 76Ga(β-)[from 76Ge(n, p), E=6.2-21 MeV]; measured Eγ, Iγ, cross section with a focus on the intensity of the 2040.7-keV γ ray, relevant to the measurements of 76Ge 0νββ decay by GERDA Collaboration. Also discussed experimental results of 76Ge(n, n'γ) reaction by the Kentucky group.
doi: 10.1103/PhysRevC.93.014614
2015BH02 Phys.Lett. B 741, 150 (2015) M.Bhike, B.Fallin, Krishichayan, W.Tornow Measurement of the neutron-capture cross section of 76Ge and 74Ge below 15 MeV and its relevance to 0νββ decay searches of 76Ge NUCLEAR REACTIONS 74,76Ge(n, γ), E=0.4-14.8 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with ENDF/B-VII.1 and CENDL-3.1 evaluated libraries, TALYS nuclear model code calculations.
doi: 10.1016/j.physletb.2014.12.004
2015BH10 Phys.Rev. C 92, 014624 (2015) M.Bhike, E.Rubino, M.E.Gooden, Krishichayan, W.Tornow Measurements of the 86Kr (n, γ)87Kr and 86Kr (n , 2n)85Krm reaction cross sections below En = 15 MeV NUCLEAR REACTIONS 86Kr(n, γ), E=0.37-14.8 MeV; 86Kr(n, 2n)85mKr, E=10.9 and 14.8 MeV; measured Eγ, Iγ, σ(E) by activation method. Comparison with ENDF/B-VII.1, JENDL-4.0 and EAF-2010 evaluations, and model calculation TENDL-2012 of the TALYS code. Relevance to studies deuterium-tritium plasma density created in inertial confinement fusion reactions at NIF-LLNL facility.
doi: 10.1103/PhysRevC.92.014624
2015KR04 Phys.Rev. C 91, 044328 (2015) Krishichayan, M.Bhike, W.Tornow, G.Rusev, A.P.Tonchev, N.Tsoneva, H.Lenske Polarized photon scattering off 52Cr Determining the parity of J=1 states NUCLEAR REACTIONS 52Cr(polarized γ, γ'), E=5.21, 5.56, 6.40, 6.50, 7.00, 7.08, 7.19, 7.40, 7.51, 7.74, 7.89, 8.02, 8.11, 8.20, 8.75, 8.95, 9.15, 9.25, 9.36, 9.45 MeV; measured Eγ, Iγ, linear polarization using High Intensity γ-Ray Source (HIγS) facility of TUNL. 52Cr; deduced levels, J, π, B(M1), B(E1), E1 and M1 strength functions, spin-flip M1 resonance structure around 9.1 MeV, fragmentation pattern of the dipole strength below and around the neutron emission threshold, new mode of excitation related to pygmy dipole resonance (PDR). Comparison with calculations using three-phonon quasiparticle phonon model (QPM) with self-consistent energy-density functional theory.
doi: 10.1103/PhysRevC.91.044328
2015KR08 Phys.Rev. C 92, 044323 (2015) Krishichayan, Y.-W.Lui, J.Button, D.H.Youngblood, G.Bonasera, S.Shlomo Isoscalar giant resonances in 90, 92, 94Zr NUCLEAR REACTIONS 90,92,94Zr(α, α'), E=240 MeV; measured inelastic α spectra, σ(θ) distributions using multipole-dipole-multipole (MDM) spectrometer at Texas A and M. 90,92,94Zr; deduced E0 (ISGMR), E1 (ISGDR), E2 (ISGQR) and E3 (ISGOR) isoscalar giant resonances, centroid energies, FWHM, widths, strengths EWSR. Comparison with previous experimental studies. DWBA calculations using density-dependent single-folding model. Systematics of centroid energies, widths and strengths for A=90-100, even-even Mo and Zr isotopes. Comparison of strength distributions with Hartree-Fock based RPA calculations using KDE0v1 Skyrme type interaction.
doi: 10.1103/PhysRevC.92.044323
2015YO04 Phys.Rev. C 92, 014318 (2015) D.H.Youngblood, Y.-W.Lui, Krishichayan, J.Button, G.Bonasera, S.Shlomo Isoscalar E0, E1, E2, and E3 strength in 92, 96, 98, 100Mo NUCLEAR REACTIONS 92,96,98,100Mo(α, α'), E=240 MeV; measured Eα, Iα, angular distributions using multipole-dipole-multipole (MDM) spectrometer and a focal plane detector at Texas A and M K500 superconducting cyclotron facility. DWBA analysis of σ(θ) data. 92,96,98,100Mo; deduced isoscalar giant resonances and E0, E1, E2, and E3 transition strengths and EWSR. Comparison with spherical Hartree-Fock-RPA calculations using KDE0v1 Skyrme-type interaction.
doi: 10.1103/PhysRevC.92.014318
2013AN05 Phys.Rev. C 87, 024303 (2013) M.R.Anders, S.Shlomo, T.Sil, D.H.Youngblood, Y.-W.Lui, Krishichayan Giant resonances in 40Ca and 48Ca NUCLEAR STRUCTURE 40,48Ca; calculated strength functions S(E), centroid energies of isoscalar and isovector (monopole, dipole, quadrupole, and octupole) giant resonances. Self-consistent Hartree-Fock-based random phase approximation calculations with 18 Skyrme-type nucleon-nucleon effective interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.87.024303
2013YO07 Phys.Rev. C 88, 021301 (2013) D.H.Youngblood, Y.-W.Lui, Krishichayan, J.Button, M.R.Anders, M.L.Gorelik, M.H.Urin, S.Shlomo Unexpected characteristics of the isoscalar monopole resonance in the A ≈ 90 region: Implications for nuclear incompressibility NUCLEAR REACTIONS 90,92,94Zr, 92,96,98,100Mo(α, α'), E=240 MeV; measured α spectra, σ at low angles using Texas A-M cyclotron facility; deduced energies, centroids, widths, E0-EWSR for isoscalar giant monopole resonances (ISGMR), nuclear incompressibility. Comparison with HF-RPA calculations.
doi: 10.1103/PhysRevC.88.021301
2011LU07 Phys.Rev. C 83, 044327 (2011) Y.-W.Lui, D.H.Youngblood, S.Shlomo, X.Chen, Y.Tokimoto, Krishichayan, M.Anders, J.Button Isoscalar giant resonances in 48Ca NUCLEAR REACTIONS 48Ca(α, α'), E=240 MeV; measured Eα, Iα, cross sections, σ(θ) for isoscalar giant resonances. 48Ca; deduced B(E2), B(E3), E0, E1, E2 E3+E4 energy-weighted sum rules (EWSR), isoscalar strength distributions, giant resonances, centroid energies. Comparison with mean-field-based random-phase approximation.
doi: 10.1103/PhysRevC.83.044327
2010KR01 Phys.Rev. C 81, 014603 (2010) Krishichayan, X.Chen, Y.-W.Lui, Y.Tokimoto, J.Button, D.H.Youngblood Elastic and inelastic scattering to low-lying states of 58Ni and 90Zr using 240-MeV 6Li NUCLEAR REACTIONS 58Ni, 90Zr(6Li, 6Li), (6Li, 6Li'), E=240 MeV; measured particle spectra, σ(θ) using multipole dipole-multipole (MDM) magnetic spectrometer. 58Ni, 90Zr; deduced levels, J, π, B(E2) for first 2+, and B(E3) for first 3- states. Comparison with deformed potential (DP) model and density-dependent double-folding (DDF) calculations using M3Y NN effective interaction and phenomenological Woods-Saxon potential.
doi: 10.1103/PhysRevC.81.014603
2010KR06 Phys.Rev. C 81, 044612 (2010) Krishichayan, X.Chen, Y.-W.Lui, J.Button, D.H.Youngblood Elastic and inelastic scattering of 240-MeV 6Li ions from 40Ca and 48Ca and tests of a systematic optical potential NUCLEAR REACTIONS 40,48Ca(6Li, 6Li), (6Li, 6Li'), E=240 MeV; measured σ, σ(θ); deduced optical model parameters B(E2) for first 2+ states, B(E3) for first 3- states, isoscalar giant-monopole resonance (ISGMR) strength, EWSR. DWBA analysis. Comparison with theoretical calculations using density-dependent double-folding (DDF) model with M3Y-NN effective interaction.
doi: 10.1103/PhysRevC.81.044612
2009CH43 Phys.Rev. C 80, 034326 (2009) R.Chakrabarti, S.Mukhopadhyay, Krishichayan, A.Chakraborty, A.Ghosh, S.Ray, S.S.Ghugre, A.K.Sinha, L.Chaturvedi, A.Y.Deo, I.Mazumdar, P.K.Joshi, R.Palit, Z.Naik, S.Kumar, N.Madhavan, R.P.Singh, S.Muralithar, B.K.Yogi, U.Garg Experimental study of nuclei in the vicinity of the "island of inversion" through the fusion-evaporation reaction NUCLEAR REACTIONS 18O(18O, X)33P/34P/33S/34S, E=34 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), DCO ratios, γ(lin pol). 33,34P, 33S, 34S; deduced levels, J, π, multipolarity, mixing ratios, bands, branching ratios, transition probabilities. Comparison with truncated shell model calculations in the sdpf valence space.
doi: 10.1103/PhysRevC.80.034326
2009DH01 Phys.Rev. C 80, 014320 (2009) A.Dhal, R.K.Sinha, L.Chaturvedi, P.Agarwal, S.Kumar, A.K.Jain, R.Kumar, I.M.Govil, S.Mukhopadhyay, A.Chakraborty, Krishichayan, S.Ray, S.S.Ghugre, A.K.Sinha, R.Kumar, R.P.Singh, S.Muralithar, R.K.Bhowmik, S.C.Pancholi, J.B.Gupta High spin states in 139Pm NUCLEAR REACTIONS 116Cd(27Al, 4n), E=120 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), DCO. 139Pm; deduced levels, J, π, bands, magnetic rotational bands, B(M1) and B(E2). Comparison with tilted axis cranking calculations.
doi: 10.1103/PhysRevC.80.014320
2009KU24 Phys.Rev. C 80, 054319 (2009) R.Kumar, I.M.Govil, A.Dhal, L.Chaturvedi, C.R.Praharaj, A.K.Rath, G.Kiran Kumar, S.K.Basu, A.Chakraborty, Krishichayan, S.Mukhopadhyay, N.S.Pattabiraman, S.S.Ghugre, A.K.Sinha Triaxial shape coexistence and new aligned band in 178Os NUCLEAR REACTIONS 165Ho(20Ne, p6n), E=150 MeV; measured Eγ, Iγ, γγ-coin, DCO, and linear polarizations. 178Os; deduced levels, J, π, bands, multipolarities, and configurations. Comparison with projected angular momentum deformed Hartree-Fock and cranked Woods-Saxon model calculations.
doi: 10.1103/PhysRevC.80.054319
2008KI14 J.Phys.(London) G35, 095104 (2008) G.Kiran Kumar, S.Mukherjee, S.Mukhopadhyay, Krishichayan, S.Ray, S.S.Ghugre, A.Chakraborty, A.K.Sinha, S.K.Basu Level structure of the odd-odd nucleus 54Mn NUCLEAR REACTIONS 51V(20Ne, X)54Mn, E=145 MeV; measured Eγ, Iγ, γγ-coin; 54Mn; deduced levels, J, π, γ-ray polarization, DCO ratio; clover detector array; calculated and compared yrast and non-yrast levels with shell model calculations using OXBASH code.
doi: 10.1088/0954-3899/35/9/095104
2008PA27 Phys.Rev. C 78, 024301 (2008) N.S.Pattabiraman, D.G.Jenkins, M.A.Bentley, R.Wadsworth, C.J.Lister, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Seweryniak, S.Zhu, G.Lotay, P.J.Woods, Krishichayan, P.Van Isacker Analog E1 transitions and isospin mixing NUCLEAR REACTIONS 16O(16O, n), (16O, p), E=29 MeV; measured Eγ, Iγ, half-lives using Doppler Shift Attenuation method. 31S, 31P; deduced B(E1). 31Si, 31P, 31,35S, 35Cl, 35Ar; analyzed B(E1), isospin mixing.
doi: 10.1103/PhysRevC.78.024301
2008RA06 Phys.Rev. C 77, 024305 (2008); Erratum Phys.Rev. C 78, 049901 (2008) S.Ray, N.S.Pattabiraman, Krishichayan, A.Chakraborty, S.Mukhopadhyay, S.S.Ghugre, S.N.Chintalapudi, A.K.Sinha, U.Garg, S.Zhu, B.Kharraja, D.Almehed Level structure of 103Ag at high spin NUCLEAR REACTIONS 72Ge(35Cl, 2n2pγ), E=135 MeV; measured Eγ, Iγ, γγ-coin, angular distributions, half-lives; deduced level energies, J, π, B(M1), B(E2), configurations, existence of magnetic dipole bands.
doi: 10.1103/PhysRevC.77.024305
2007CH74 Phys.Rev. C 76, 044327 (2007) A.Chakraborty, Krishichayan, S.Mukhopadhyay, S.Ray, S.N.Chintalapudi, S.S.Ghugre, N.S.Pattabiraman, A.K.Sinha, S.Sarkar, U.Garg, S.Zhu, M.S.Sarkar High-spin structure and band termination in 103Cd NUCLEAR REACTIONS 72Ge(35Cl, 3np), E=135 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), multipolarities. 103Cd deduced levels, J, π, angular momentum, bands; calculated shell-model configurations. Gammasphere array.
doi: 10.1103/PhysRevC.76.044327
2006KR07 Eur.Phys.J. A 29, 151 (2006) Krishichayan, A.Chakraborty, S.Mukhopadhyay, S.Ray, N.S.Pattabiraman, S.S.Ghugre, R.Goswami, A.K.Sinha, S.Sarkar, U.Garg, P.V.Madhusudhana Rao, S.K.Basu, B.K.Yogi, L.Chaturvedi, A.Dhal, R.K.Sinha, M.S.Sarkar, S.Saha, R.Singh, R.K.Bhowmik, A.Jhingan, N.Madhavan, S.Muralithar, S.Nath, R.P.Singh, P.Sugathan Spin-parity measurements in the neutron-rich N ∼ 20 34P and 36S nuclei NUCLEAR REACTIONS 115In(34S, X)34P/36S/146Tb/145Gd/146Gd, E=140 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 34P, 36S deduced levels, J, π, configurations.
doi: 10.1140/epja/i2006-10084-x
2006RA10 Phys.Rev. C 73, 044305 (2006) R.Raut, S.Ganguly, R.Kshetri, P.Banerjee, S.Bhattacharya, B.Dasmahapatra, A.Mukherjee, G.Mukherjee, M.S.Sarkar, A.Goswami, G.Gangopadhyay, S.Mukhopadhyay, Krishichayan, A.Chakraborty, S.S.Ghugre, T.Bhattacharjee, S.K.Basu High spin states in 143Sm NUCLEAR REACTIONS 130Te(20Ne, 7n), E=137 MeV; measured Eγ, Iγ, γγ-coin. 143Sm deduced high-spin levels, J, π. Comparison with model predictions.
doi: 10.1103/PhysRevC.73.044305
2005CH65 Phys.Rev. C 72, 054309 (2005) A.Chakraborty, Krishichayan, S.S.Ghugre, R.Goswami, S.Mukhopadhyay, N.S.Pattabiraman, S.Ray, A.K.Sinha, S.Sarkar, P.V.Madhusudhana Rao, U.Garg, S.K.Basu, M.B.Chatterjee, M.S.Sarkar, L.Chaturvedi, A.Dhal, R.K.Sinha, I.M.Govil, R.K.Bhowmik, A.Jhingan, N.Madhavan, S.Muralithar, S.Nath, R.P.Singh, P.Sugathan Spectroscopy of 90Nb at high spin NUCLEAR REACTIONS 63Cu(31P, n3p), E=120, 125 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 90Nb deduced levels, J, π, configurations, isomeric states T1/2, B(E2). Large-basis shell model calculations.
doi: 10.1103/PhysRevC.72.054309
2004CH35 Phys.Rev. C 70, 014311 (2004) A.Chakraborty, Krishichayan, S.S.Ghugre, R.Goswami, S.Mukhopadhyay, N.S.Pattabiraman, S.Ray, A.K.Sinha, S.Sarkar, P.V.M.Rao, U.Garg, S.K.Basu, L.Chaturvedi, A.Dhal, R.K.Sinha, I.M.Govil, M.B.Chatterjee, M.S.Sarkar, R.K.Bhowmik, A.Jhingan, N.Madhavan, S.Muralithar, S.Nath, R.P.Singh, P.Sugathan Lifetime measurements of microsecond isomers in the N = 48 nuclei 88Zr and 90Mo using recoil-isomer tagging NUCLEAR REACTIONS 63Cu(31P, xnyp)90Mo/88Zr, E=120 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 90Mo, 88Zr deduced isomeric states T1/2, B(E2). Recoil-isomer tagging, comparison with model predictions.
doi: 10.1103/PhysRevC.70.014311
2004KR14 Phys.Rev. C 70, 044315 (2004) Krishichayan, A.Chakraborty, S.S.Ghugre, R.Goswami, S.Mukhopadhyay, N.S.Pattabiraman, S.Ray, A.K.Sinha, S.Sarkar, P.V.M.Rao, U.Garg, S.K.Basu, B.K.Yogi, L.Chaturvedi, A.Dhal, R.K.Sinha, M.S.Sarkar, S.Saha, R.Singh, R.K.Bhowmik, A.Jhingan, N.Madhavan, S.Muralithar, S.Nath, R.P.Singh, P.Sugathan High-spin states in the odd-odd nucleus 146Tb NUCLEAR REACTIONS 115In(34S, 3n), E=140 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 146Tb deduced high-spin levels, J, π, configurations.
doi: 10.1103/PhysRevC.70.044315
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