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NSR database version of April 29, 2024.

Search: Author = E.A.Coello Perez

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2022BR11      Phys.Rev. C 106, 034309 (2022)

C.Brase, J.Menendez, E.A.Coello Perez, A.Schwenk

Neutrinoless double-β decay from an effective field theory for heavy nuclei

RADIOACTIVITY ⁴⁸Ca, ⁷⁰Zn, ⁷⁶Ge, ^80,82Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹⁰⁴Ru, ¹¹⁰Pd, ^114,116Cd, ^128,130Te, ¹³⁶Xe, ¹⁵⁰Nd(2β^-); ⁶⁴Zn, ^106,108Cd, ¹¹²Sn, ¹²⁴Xe(2β⁺), (2EC); calculated double-Gamow-Teller (DGT) nuclear matrix elements (NMEs) in the EFT for different combinations of neutron and proton orbitals, correlation between DGT and NMEs for 0νββ decay mode, nuclear matrix elements (NMEs) for 0νββ decays using effective field theory (EFT) with a spherical core coupled to additional neutrons and/or protons in the adjacent nuclei; compiled experimental structure data from the ENSDF database for parent nuclei as well as relevant adjacent nuclei and nuclei one neutron and proton away from the parent and double-beta decay daughter nuclei: ⁴⁷Ca, ^47,49Sc, ⁴⁹Ti, ⁶³Ni, ^63,65Cu, ^65,69Zn, ^69,71Ga, ^71,75Ge, ^75,77As, ^77,79,81Se, ^79,81,83Br, ^81,83Kr, ⁹⁹Mo, ^99,101Tc, ^101,103Ru, ^103,105Rh, ^105,107,109Pd, ^{105,107,109,111}Ag, ^{107,109,111,113}Cd, ^111,113,115In, ^113,115Sn, ^123,127,129Te, ^{123,125,127,129,131}I, ^125,129,131Xe, ^135,137Cs, ¹³⁷Ba, ^149,151Pm, ¹⁵¹Sm. Comparison with results from different models: nuclear shell model (NSM), interacting boson model (IBM), effective field theory (EDF), quasiparticle random-phase approximation (QRPA), ab initio using multireference in-medium similarity renormalization group (MR-IMSRG), valence space in-medium similarity renormalization group (VS-IMSRG), and coupled-cluster (CC).

doi: 10.1103/PhysRevC.106.034309
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2021AL30      Phys.Rev. C 104, 064311 (2021)

I.K.Alnamlah, E.A.Coello Perez, D.R.Phillips

Effective field theory approach to rotational bands in odd-mass nuclei

NUCLEAR STRUCTURE ⁹⁹Tc, ¹⁵⁹Dy, ^167,169Er, ^167,169Tm, ¹⁸³W, ²³⁵U, ²³⁹Pu; calculated rotational bandhead energies, J, π, energy scales, relative correction to energies in bands at each order, low-energy constants (LECs) at each order for K=1/2 bands, for K=3/2 bands in ¹⁶⁷Er and ¹⁵⁹Dy, for K=5/2, 7/2 bands in ¹⁶⁷Er and ²³⁵U. ¹⁶⁹Er, ^167,169Tm, ²³⁹Pu, ¹⁵⁹Dy, ⁹⁹Tc, ¹⁸³W; calculated energies and energy residuals for ground-state and excited-state rotational bands at LO, NLO, N²LO, N³LO, and N⁴LO orders as follows: 1/2- g.s. band up to 35/2- for ¹⁶⁹Er, 1/2+ g.s. band up to 31/2+ for ¹⁶⁷Tm, 1/2+ excited band up to 19/2+ for ¹⁶⁹Tm, 1/2+ g.s. band up to 53/2+ for ²³⁹Pu, 3/2- g.s. band up to 29/2- for ¹⁵⁹Dy; 1/2- excited band up to 31/2- in ⁹⁹Tc, and 1/2- g.s. band up to 35/2 in ¹⁸³W. ¹⁶⁷Er, ²³⁵U; calculated energy residuals for 1/2-, 5/2-, and 7/2+ rotational bands in ¹⁶⁷Er, and for the 1/2+, 5/2+, and 7/2- rotational bands in ²³⁵U at LO, NLO, N²LO, N³LO, and N⁴LO orders; extracted breakdown scale in different systems. Extension of effective field theory up to fourth order in the angular velocity to describe rotational bands in even-even nuclei to the odd-mass case, and possibility of application of this EFT to halo nuclei in which low-lying rotational states of the core play a prominent role, such as in ¹¹Be and ³¹Ne nuclei. Comparison with experimental band structures, data taken from ENSDF database and publications in Nuclear Data Sheets.

doi: 10.1103/PhysRevC.104.064311
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2021ZU01      Phys.Rev. C 103, 014325 (2021)

L.Zurek, E.A.Coello Perez, S.K.Bogner, R.J.Furnstahl, A.Schwenk

Comparing different density-matrix expansions for long-range pion exchange

NUCLEAR STRUCTURE ¹⁶O, ⁴⁸Ca, ¹³²Sn; calculated normalized density-matrix square for ¹³²Sn, isoscalar density distributions, and ratios of the DME-approximated and exact exchange energy contributions for Yukawa interaction for ¹⁶O, ⁴⁸Ca, ¹³²Sn, scalar-isoscalar and scalar-isovector exchange-energy integrands for Yukawa interaction in ¹³²Sn. Density-matrix expansion (DME) with two-body scalar terms to embed long-range pion interactions into a Skyrme energy density functional.

doi: 10.1103/PhysRevC.103.014325
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2018CO13      Phys.Rev. C 98, 045501 (2018)

E.A.Coello Perez, J.Menendez, A.Schwenk

Gamow-Teller and double-β decays of heavy nuclei within an effective theory

RADIOACTIVITY ^62,64Cu, ⁶⁸Ga, ^78,80Br, ^80,82Rb, ¹⁰⁴Rh, ^106,108Ag, ¹¹²In, ¹²⁸I(EC), (β⁺); ^66,68Cu, ⁷⁰Ga, ⁸⁰As, ⁸⁰Br, ^98,100Nb, ^100,102Tc, ^104,106,108Rh, ^108,110,114Ag, ^{114,116,118,120,122}In(β^-); ⁶⁴Zn, ^106,108Cd, ¹¹²Sn(2EC); ⁷⁰Zn, ⁷⁶Ge, ^80,82Se, ¹⁰⁰Mo, ¹⁰⁴Ru, ^114,116Cd, ¹¹⁰Pd, ^128,130Te(2β^-); calculated Gamow-Teller matrix elements from 1+ parent states in single β decay, and for 2νββ and 2ν(EC)(EC) decay modes from 0+ parent states using effective field framework. Comparison with experimental values.

NUCLEAR REACTIONS ⁶⁴Ni, ⁷⁶Ge, ⁸²Se, ¹⁰⁰Mo, ¹¹⁶Cd, ^128,130Te(³He, t), E not given; analyzed experimental partial Gamow-Teller strengths; deduced logft values, and compared with available experimental values.

doi: 10.1103/PhysRevC.98.045501
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2016CO20      Phys.Rev. C 94, 054316 (2016)

E.A.Coello Perez, T.Papenbrock

Effective field theory for vibrations in odd-mass nuclei

NUCLEAR STRUCTURE ⁹⁸Ru, ⁹⁹Rh; ¹⁰⁰Ru, ¹⁰¹Rh; ¹⁰²Ru, ¹⁰³Rh; ¹⁰⁴Pd, ¹⁰⁵Ag; ¹⁰⁶Pd, ¹⁰⁷Ag; ¹⁰⁸Pd, ¹⁰⁹Ag; ¹¹⁰Pd, ¹¹¹Ag; ¹⁰⁸Cd, ¹⁰⁷Ag; ¹¹⁰Cd, ¹⁰⁹Ag; ¹⁰⁸Cd, ¹⁰⁷Ag; ¹¹²Cd, ¹¹¹Ag; calculated low-energy constants (LECs), next-to-next-to-leading order (NNLO) spectra of even-even/odd-mass systems. ¹⁰²Ru, ¹⁰³Rh, ^106,108Pd, ^107,109Ag, ^{110,111,112,113}Cd; calculated B(E2), B(M1), magnetic dipole and electric quadrupole moments. Effective field theory (EFT) for simultaneous description of spherical even-even/odd-mass. Comparison with available experimental data.

doi: 10.1103/PhysRevC.94.054316
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2015CO08      Phys.Rev. C 92, 014323 (2015)

E.A.Coello Perez, T.Papenbrock

Effective theory for the nonrigid rotor in an electromagnetic field: Toward accurate and precise calculations of E2 transitions in deformed nuclei

NUCLEAR STRUCTURE ¹⁵⁰Nd, ^152,154Sm, ¹⁵⁴Gd, ¹⁶²Dy, ^166,168Er, ¹⁷⁴Yb, ¹⁸⁸Os, ²³⁶U; calculated quadrupole decays within the ground-state bands, B(E2) for transitions in ground, β and γ bands. Model-independent approach based on an effective theory for axially symmetric systems. Comparison with experimental data.

ATOMIC PHYSICS H, N; calculated quadrupole transition moments for decays within the ground band of the H₂ and N₂ molecules. Model-independent approach based on an effective theory. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.014323
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2015CO17      Phys.Rev. C 92, 064309 (2015)

E.A.Coello Perez, T.Papenbrock

Effective field theory for nuclear vibrations with quantified uncertainties

NUCLEAR STRUCTURE ⁶²Ni, ^98,100Ru, ^106,108Pd, ^110,112,114Cd, ^118,120,122Te; calculated energies of three-phonon levels, B(E2) and comparison with experimental results. Anharmonic vibrators. Leading order (LO) and next-to-leading-order (NLO) effective field theory (EFT) for nuclear vibrations. Bayesian statistics for quantification of theoretical uncertainties.

doi: 10.1103/PhysRevC.92.064309
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