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Search: Author = A.Giannatiempo

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2020GI09      Phys.Rev. C 102, 064316 (2020)

A.Giannatiempo

Ground state and quasi-γ bands in the even Ba chain

NUCLEAR STRUCTURE 118,120,122,124,126,128,130,132,134,142,144,146,148,150Ba; calculated energy levels, J, π for ground and γ bands, B(E2), B(M1), γ-branching ratios, E2/M1 mixing ratios, magnetic dipole moments μ and electric quadrupole moments Q for the ground states, signature splittings using IBA-2 model. Comparison with experimental data. Analyzed relevant wave functions in terms of F-spin and components, U(5) to SU(3) evolution of neutron-deficient and neutron-rich isotopes away from the N=82 closed shell; deduced different symmetry in the proton and neutron degrees of freedom for the ground and quasi-γ bands. Z=52, N=56-88; Z=54, N=56-90; Z=56, N=62-94; Z=58, N=64-94; Z=60, N=68-100; systematics of E(first 4+)/E(first 2+) in even-even nuclei.

doi: 10.1103/PhysRevC.102.064316
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2018GI10      Phys.Rev. C 98, 034305 (2018)

A.Giannatiempo

Vibrational-γ bands in even 104-118isotopes

NUCLEAR STRUCTURE 104,106,108,110,112,114,116,118Pd; calculated levels, J, π, B(M1), B(E2), mixing ratios, quadrupole moments; analyzed relevant wave functions in terms of F-spin and nd components in the vibrational γ bands using the IBA-2 model. Comparison with experimental data. Discussed role of mixed symmetry (MS) character in the proton and neutron degrees of freedom.

doi: 10.1103/PhysRevC.98.034305
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2017GI13      Phys.Rev. C 96, 044326 (2017)

A.Giannatiempo

Structure of 98Ru in the IBA-2 interacting boson model

NUCLEAR STRUCTURE 98Ru; calculated levels, J, π, magnetic dipole and electric quadrupole moments, B(E2), B(M1), E2/M1 mixing ratios using IBA-2 model. Comparison with experimental values. Discussed U(5) symmetry and mixed-symmetry states.

doi: 10.1103/PhysRevC.96.044326
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2016GI05      Phys.Rev. C 94, 054327 (2016)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona

Spectroscopy of 98Ru

NUCLEAR REACTIONS 97Mo(3He, 2n), E=13 MeV; measured Eγ, Iγ, conversion electrons using a magnetic transport system and Si(Li) detector, γγ-coin, γ(θ), γγ(θ) at the CN accelerator of Laboratori Nazionali di Legnaro (Padua). 98Ru; deduced levels, J, π, K-conversion coefficients, multipolarities, mixing ratios.

doi: 10.1103/PhysRevC.94.054327
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2013GI03      Eur.Phys.J. A 49, 37 (2013)

A.Giannatiempo

Gyromagnetic factors in the even Ru and Pd chains

NUCLEAR STRUCTURE 96,98,100,102,104,106,108,110,112Ru, 100,102,104,106,108,110,112,114,116Pd; calculated 2+ energy, g-factors using IBA-2. Compared with calculations using other models and with data.

doi: 10.1140/epja/i2013-13037-4
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2012GI02      Phys.Rev. C 86, 034311 (2012)

A.Giannatiempo, L.Fortunato, A.Vitturi

Spherical to prolate axially symmetric shape transition, Uπν(5) → SUπν(3), in the interacting boson model IBA-2

NUCLEAR STRUCTURE 144,146,148,150,152,154,156Nd; calculated levels, J, π, ground-state, quasi-β, and quasi-γ bands, potential energy surface contours, levels, B(E2) using IBA-2 model. Comparison with X(5) model predictions, and with experimental data.

doi: 10.1103/PhysRevC.86.034311
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2011GI06      Phys.Rev. C 84, 024308 (2011)

A.Giannatiempo

Heavy neodymium isotopes in the interacting boson (IBA-2) model

NUCLEAR STRUCTURE 144,146,148,150,152,154,156Nd; calculated levels, quadrupole moments, B(E2), B(M1), δ(E2/M1), branching ratios. Neutron-proton Interacting boson model. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.024308
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2011GI08      Phys.Rev. C 84, 034319 (2011)

A.Giannatiempo

Gyromagnetic factors in 144-150Nd

NUCLEAR STRUCTURE 144,146,148,150Nd; calculated energies, g-factors, reduced matrix elements, quadrupole moments, and B(E2) values of the first 2+ states. Interacting boson approximation (IBA-2) model, U(5) to SU(3) evolution. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.034319
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2010BI11      Phys.Rev. C 82, 054311 (2010)

P.G.Bizzeti, A.M.Bizzeti-Sona, D.Tonev, A.Giannatiempo, C.A.Ur, A.Dewald, B.Melon, C.Michelagnoli, P.Petkov, D.Bazzacco, A.Costin, G.de Angelis, F.Della Vedova, M.Fantuzi, E.Farnea, C.Fransen, A.Gadea, S.Lenzi, S.Lunardi, N.Marginean, R.Marginean, R.Menegazzo, D.Mengoni, O.Moller, A.Nannini, D.R.Napoli, M.Nespolo, P.Pavan, A.Perego, C.M.Petrache, N.Pietralla, C.Rossi Alvarez, P.Sona

Transition probabilities in the X(5) candidate 122Ba

NUCLEAR REACTIONS 108Cd(16O, 2n), E=62, 64, 65 MeV; 112Sn(13C, 3n), E=59 MeV; measured Eγ, Iγ, γγ-coin, half-lives by recoil-distance Doppler-shift (RDDS) method using plunger device, and differential decay curve method (DDCM). 122Ba; deduced levels, B(E2). Comparison with X(5), IBA-1 and IBA-2 model calculations.

doi: 10.1103/PhysRevC.82.054311
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2005GI17      Phys.Rev. C 72, 044308 (2005)

A.Giannatiempo, A.Perego, P.Sona, A.Nannini, H.Mach, B.Fogelberg, M.J.G.Borge, O.Tengblad, L.M.Fraile, A.J.Aas, K.Gulda

Spectroscopy and lifetime measurements of states in 76Kr populated in 76Rb decay

RADIOACTIVITY 76Rb(β+), (EC) [from Nb(p, X)]; measured Eγ, Iγ, E(ce), I(ce), γγ-, βγ-coin; deduced log ft. 76Kr deduced levels J, π, T1/2, ICC. 76Rb deduced ground state J, π.

doi: 10.1103/PhysRevC.72.044308
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2004GI10      Eur.Phys.J. A 21, 237 (2004)

A.Giannatiempo, A.Nannini, P.Sona

Symmetry character of positive-parity bands in neutron-rich even palladium isotopes

NUCLEAR STRUCTURE 110,112,114,116Pd; analyzed levels, J, π, rotational bands; deduced parameters, mixed-symmetry components. 118Pd; calculated levels, J, π. IBA-2 model.

doi: 10.1140/epja/i2003-10213-1
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2002GI05      Eur.Phys.J. A 13, 339 (2002)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona

Symmetry Character of Collective States in 104Pd Populated in the EC-β+ Decay of 104Ag

NUCLEAR STRUCTURE 104Pd; calculated levels, J, π, configuration, for states populated in decay of 104Ag. Comparison with data, proton-neutron interacting boson model results.

doi: 10.1007/s10050-002-8762-9
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2001BE26      Phys.Rev. C63, 064313 (2001)

M.E.Bellizzi, A.Giannatiempo, A.Nannini, A.Perego, P.Sona

Angular Correlations and Internal Conversion Coefficients of γ-Ray Transitions in 104Pd

RADIOACTIVITY 104,104mAg(β+)(EC) [from 104Pd(p, n)]; measured Eγ, Iγ, E(ce), I(ce), γγ-coin, angular correlations. 104Pd deduced levels, J, π, ICC, δ.

doi: 10.1103/PhysRevC.63.064313
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2000GI16      Phys.Rev. C62, 044302 (2000)

A.Giannatiempo, P.Sona, A.Nannini

Symmetry Character of Bands in 72-84Kr in the Proton-Neutron Interacting Boson Model

NUCLEAR STRUCTURE 72,74,76,78,80,82,84Kr; calculated rotational bands level energies, J, π, transitions B(E2), B(M1). IBA-2 model.

doi: 10.1103/PhysRevC.62.044302
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1998GI18      Phys.Rev. C58, 3316 (1998)

A.Giannatiempo, A.Nannini, P.Sona

Interacting Boson Approximation-2 Analysis of the Pd and Ru Chains. I. Mixed Symmetry States of Fmax-1 Character in Even Palladium Isotopes

NUCLEAR STRUCTURE 100,102,104,106,108,110,112,114,116Pd; calculated levels configurations, transitions B(λ), δ; deduced parity-mixing components. IBA-2 model, U(5) limit.

doi: 10.1103/PhysRevC.58.3316
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1998GI19      Phys.Rev. C58, 3335 (1998)

A.Giannatiempo, A.Nannini, P.Sona

Interacting Boson Approximation-2 Analysis of the Pd and Ru Chains. II. Mixed Symmetry States of F < Fmax-1 Character in Even Palladium and Ruthenium Isotopes

NUCLEAR STRUCTURE 100,102,104,106,108,110,112,114,116Pd, 98,100,102,104,106,108,110,112,114Ru; analyzed levels, transitions B(λ), δ; deduced low-lying F < F(max)-1 mixed symmetry states. IBA-2 approach.

doi: 10.1103/PhysRevC.58.3335
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1996GI04      Phys.Rev. C53, 2770 (1996)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona, D.Cutoiu

Spin-Parity Assignments and Evidence for Mixed-Symmetry States in 100Ru

RADIOACTIVITY 100Rh(β+), (EC) [from 100Ru(p, n)]; measured I(ce), Eγ, Iγ. 100Ru deduced levels, ICC, J, π, γ-branching ratio. Interacting boson model.

doi: 10.1103/PhysRevC.53.2770
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1995GI13      Phys.Rev. C52, 2444 (1995)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona, M.J.G.Borge, O.Tengblad, and the ISOLDE Collaboration

Decay Properties of the 0+2 State and Spin-Parity Assignments in 78Kr

RADIOACTIVITY 78Rb(β+), (EC); measured I(ce), Iγ, Eγ, DSA. 78Kr deduced levels, J, π, T1/2, ρ2(E0), ICC. Interacting boson model.

doi: 10.1103/PhysRevC.52.2444
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1995GI14      Phys.Rev. C52, 2969 (1995)

A.Giannatiempo, A.Nannini, P.Sona, D.Cutoiu

Full-Symmetry and Mixed-Symmetry States in Even Ruthenium Isotopes

NUCLEAR STRUCTURE 98,100,102,104,106,108,110,112,114Ru; calculated levels, B(λ), electric quadrupole moments, γ branching ratios, γ strength function. Interacting boson model approach.

doi: 10.1103/PhysRevC.52.2969
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1993FA11      Z.Phys. A346, 21 (1993)

T.F.Fazzini, A.Giannatiempo, A.Nannini, A.Perego, D.Cutoiu

Search for the Lowest 2+ Mixed-Symmetry State in 102Ru

RADIOACTIVITY 102Rh(EC) [from 102Ru(p, n), E=6 MeV]; measured I(ce), Eγ, Iγ. 102Ru deduced level, J, π, K-shell ICC, B(λ) ratio.

doi: 10.1007/BF01290777
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1993GI01      Phys.Rev. C47, 521 (1993)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona, M.J.G.Borge, K.Riisager, O.Tengblad, and the ISOLDE Collaboration

Decay of the 0+2 State in 80Kr

RADIOACTIVITY 80Rb(β+); measured I(ce), Eγ, Iγ, DSA. 80Kr deduced level T1/2, B(E2), electric monopole strength. Model comparison.

NUCLEAR STRUCTURE 78,80,82Kr; calculated levels, B(λ). Interacting boson model.

doi: 10.1103/PhysRevC.47.521
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1993GI06      Phys.Rev. C48, 2657 (1993)

A.Giannatiempo, G.Maino, A.Nannini, P.Sona

Signatures for Mixed-Symmetry States in the U(5) Limit of the Neutron-Proton Interacting Boson Model

doi: 10.1103/PhysRevC.48.2657
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1991GI04      Phys.Rev. C44, 1508 (1991)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona, G.Maino

Full-Symmetry and Mixed-Symmetry States in 110,112,114Cd

NUCLEAR STRUCTURE 110,112,114Cd; calculated levels, B(λ), effective quadrupole charges, g-factors. Interacting boson model.

doi: 10.1103/PhysRevC.44.1508
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1991GI05      Phys.Rev. C44, 1844 (1991)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona

E0 Components of 2+(i) → 2+(f) Transitions in Even Cadmium Isotopes and Effective Monopole Charges

RADIOACTIVITY 110,112In(β+), (EC); measured I(ce), Eγ, Iγ. 110,112Cd transitions deduced ICC. Model analysis.

NUCLEAR STRUCTURE 110,112,114Cd; calculated effective monopole charges; analyzed data; deduced monopole strength parameter, B(λ) ratios. Interacting boson model.

doi: 10.1103/PhysRevC.44.1844
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1990GI01      Phys.Rev. C41, 1167 (1990)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona

02+ and 03+ States in 110Cd

RADIOACTIVITY 110In(β+) [from 110Cd(p, n)]; measured I(ce), Iγ. 110Cd levels deduced B(E0)/B(E2). Interacting boson model, configuration mixing.

NUCLEAR STRUCTURE 110Cd; calculated levels, B(λ) ratios. Interacting boson model, configuration mixing.

doi: 10.1103/PhysRevC.41.1167
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1989BI02      Phys.Lett. 221B, 99 (1989)

M.Bini, T.Fazzini, A.Giannatiempo, G.Poggi, P.Sona, N.Taccetti, K.Elsener, P.G.Hansen, E.Uggerhoj

A Sensitive Search for the Emission of a Neutral Particle in the Decay of the First Excited State in 16O

NUCLEAR REACTIONS 19F(p, α), E=1.73 MeV; measured invariant mass spectra. 16O level deduced neutral particle emission branching upper limit.

doi: 10.1016/0370-2693(89)90200-1
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1987GI09      Phys.Rev. C36, 2528 (1987)

A.Giannatiempo, A.Nannini, A.Perego, P.Sona

Electric Monopole Transitions in 122Te

RADIOACTIVITY 122I(β+) [from 122Te(p, n), E=7 MeV]; measured I(ce), Iγ, Eγ. 122Te deduced levels, J, π, B(E0)/B(E2). Interacting boson model.

doi: 10.1103/PhysRevC.36.2528
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1986GI04      Phys.Rev. C33, 1024 (1986)

A.Giannatiempo, A.Passeri, A.Perego, P.Sona

Electric Monopole Transitions in 102Ru

RADIOACTIVITY 102Rh(β+) [from 102Ru(p, n)]; measured I(ce), Iγ, Eγ. 102Ru levels deduced B(E0)/(E2), E0 transition strengths, upper limits. Interacting Boson model.

doi: 10.1103/PhysRevC.33.1024
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1986GI12      Z.Phys. A325, 157 (1986)

A.Giannatiempo, A.Nannini, A.Passeri, A.Perego, P.Sona

Electric Monopole Transitions in 76Se

RADIOACTIVITY 76Br(β+), (EC) [from 76Se(p, n), E=15 MeV]; measured I(ce), γ-spectra. 76Se deduced levels, γ-branching, γ transitions, ICC, B(E0)/B(E2), E0 transition strength parameter.


1984GI07      Z.Phys. A317, 79 (1984)

A.Giannatiempo, A.Perego

Effective Gyromagnetic Ratios in Odd Thallium Isotopes

NUCLEAR STRUCTURE 201,203,205Tl; analyzed low lying level magnetic properties data; deduced effective g(l), g(s), g(R). Intermediate coupling model.

doi: 10.1007/BF01420451
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1984GI13      Z.Phys. A319, 153 (1984)

A.Giannatiempo, A.Perego, A.Passeri

Penetration Effects in 111Cd

RADIOACTIVITY 111In(EC) [from 111Cd(p, n), E=4 MeV]; measured I(ce), Eγ, Iγ. 111Cd transitions deduced penetration parameters, K-conversion line intensity ratios.

doi: 10.1007/BF01415628
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1982GI04      Z.Phys. A306, 57 (1982)

A.Giannatiempo, A.Perego, P.Sona

Penetration Effects in 107Cd

RADIOACTIVITY 107,109Cd [from 107,109Ag(p, n), E=6 MeV]; measured Eγ, Iγ, I(ce). 107Cd deduced ICC for E2/M1 mixed transition, penetration parameter, effective core polarization dependent g.

doi: 10.1007/BF01413408
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1982GI07      Nuovo Cim. 70A, 15 (1982)

A.Giannatiempo, A.Perego, P.Sona

Penetration Effects in the K-Conversion Process of the 203 keV Transition in 109Cd

RADIOACTIVITY 109Cd(EC) [from 109Ag(p, n), E=6 MeV]; measured I(ce), Eγ, Iγ, ICC; deduced penetration parameter.


1982GI11      Z.Phys. A308, 247 (1982)

A.Giannatiempo, A.Perego

Penetration Effects in the Internal Conversion Process of the 204 keV Transition in 205Tl

NUCLEAR REACTIONS 203,205Tl(p, p'), E=3 MeV; measured I(ce). 205Tl transition deduced subshell ICC, penetration effects, δ(E2/M1).

doi: 10.1007/BF01418287
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1979GI05      Z.Phys. A290, 411 (1979)

A.Giannatiempo, G.Liberati, P.Sona

The 01+ → 0+ Electric Monopole Transition in 112Cd

RADIOACTIVITY 112mIn [from 112Cd(p, n), E=6.5-7 MeV]; measured I(ce). 112Cd levels deduced electric monopole transition, B(E2)/B(E0). Macroscopic model interpretation.

doi: 10.1007/BF01408405
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1978FA09      Lett.Nuovo Cim. 22, 593 (1978)

T.Fazzini, A.Giannatiempo, P.R.Maurenzig

Search for a 1/2- Level at 1.29 MeV in 55Mn

NUCLEAR REACTIONS 55Mn(α, α'γ), E=4.5-7 MeV; measured Coulomb excitation. 55Mn deduced levels, B(E2).

doi: 10.1007/BF02790645
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1974FA09      Nuovo Cim. 23A, 304 (1974)

T.Fazzini, A.Giannatiempo, P.R.Maurenzig

Conversion Coefficient Measurements in 49V

NUCLEAR REACTIONS 49Ti(p, nγ), E=3.6-5.2 MeV; measured Eγ, Iγ, I(ce). 49V levels deduced J, π, ICC, λ.

doi: 10.1007/BF02739485
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1973BL11      Nuovo Cim. 15A, 521 (1973)

P.Blasi, T.Fazzini, A.Giannatiempo, R.B.Huber, C.Signorini

Low-Lying Levels in 47V

NUCLEAR REACTIONS 40Ca(10B, n2pγ), E=25 MeV; 47Ti(p, nγ), E=3.6-5.3 MeV; measured γγ-coin, Eγ, recoil distance. 47V deduced levels, J, π, T1/2, γ-multipolarities, ICC.

doi: 10.1007/BF02734687
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1972CA31      Nucl.Instrum.Methods 103, 331 (1972)

A.Cambi, T.F.Fazzini, A.Giannatiempo, P.R.Maurenzig

A Compact Electron Spectrometer for in-Beam Measurements of Internal Conversion Coefficients

doi: 10.1016/0029-554X(72)90391-6
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1971CA36      Lett.Nuovo Cim. 2, 537 (1971)

A.Cambi, T.Fazzini, A.Giannatiempo, P.R.Maurenzig

Spin and Parity of Some Excited States of 48Sc

NUCLEAR REACTIONS 48Ca(p, nγ), E=1964, 1975 keV; measured ICC. 48Sc levels deduced ICC, γ-multipolarity, J.

doi: 10.1007/BF02774088
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