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NSR database version of April 11, 2024.

Search: Author = J.Kotila

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2023AU04      Eur.Phys.J. C 83, 675 (2023)

C.Augier, A.S.Barabash, F.Bellini, G.Benato, M.Beretta, L.Berge, J.Billard, Yu.A.Borovlev, L.Cardani, N.Casali, A.Cazes, E.Celi, M.Chapellier, D.Chiesa, I.Dafinei, F.A.Danevich, M.De Jesus, P.de Marcillac, T.Dixon, L.Dumoulin, K.Eitel, F.Ferri, B.K.Fujikawa, J.Gascon, L.Gironi, A.Giuliani, V.D.Grigorieva, M.Gros, D.L.Helis, H.Z.Huang, R.Huang, L.Imbert, J.Johnston, A.Juillard, H.Khalife, M.Kleifges, V.V.Kobychev, Yu.G.Kolomensky, S.I.Konovalov, J.Kotila, P.Loaiza, L.Ma, E.P.Makarov, R.Mariam, L.Marini, S.Marnieros, X.-F.Navick, C.Nones, E.B.Norman, E.Olivieri, J.L.Ouellet, L.Pagnanini, L.Pattavina, B.Paul, M.Pavan, H.Peng, G.Pessina, S.Pirro, D.V.Poda, O.G.Polischuk, S.Pozzi, E.Previtali, Th.Redon, A.Rojas, S.Rozov, V.Sanglard, J.A.Scarpaci, B.Schmidt, Y.Shen, V.N.Shlegel, V.Singh, C.Tomei, V.I.Tretyak, V.I.Umatov, L.Vagneron, M.Velazquez, B.Welliver, L.Winslow, M.Xue, E.Yakushev, M.Zarytskyy, A.S.Zolotarova

The background model of the CUPID-Mo 0νββ experiment

RADIOACTIVITY 100Mo(2β-); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced background index in the region of interest. CUPID-Mo, located in the Laboratoire Souterrain de Modane (France), was a demonstrator for the next generation 0νββ decay experiment, CUPID.

doi: 10.1140/epjc/s10052-023-11830-2
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2023AU05      Phys.Rev.Lett. 131, 162501 (2023)

C.Augier, A.S.Barabash, F.Bellini, G.Benato, M.Beretta, L.Berge, J.Billard, Yu.A.Borovlev, L.Cardani, N.Casali, A.Cazes, E.Celi, M.Chapellier, D.Chiesa, I.Dafinei, F.A.Danevich, M.De Jesus, T.Dixon, L.Dumoulin, K.Eitel, F.Ferri, B.K.Fujikawa, J.Gascon, L.Gironi, A.Giuliani, V.D.Grigorieva, M.Gros, D.L.Helis, H.Z.Huang, R.Huang, L.Imbert, J.Johnston, A.Juillard, H.Khalife, M.Kleifges, V.V.Kobychev, Yu.G.Kolomensky, S.I.Konovalov, J.Kotila, P.Loaiza, L.Ma, E.P.Makarov, P.de Marcillac, R.Mariam, L.Marini, S.Marnieros, X.-F.Navick, C.Nones, E.B.Norman, E.Olivieri, J.L.Ouellet, L.Pagnanini, L.Pattavina, B.Paul, M.Pavan, H.Peng, G.Pessina, S.Pirro, D.V.Poda, O.G.Polischuk, S.Pozzi, E.Previtali, Th.Redon, A.Rojas, S.Rozov, V.Sanglard, J.A.Scarpaci, B.Schmidt, Y.Shen, V.N.Shlegel, F.Simkovic, V.Singh, C.Tomei, V.I.Tretyak, V.I.Umatov, L.Vagneron, M.Velazquez, B.Ware, B.Welliver, L.Winslow, M.Xue, E.Yakushev, M.Zarytskyy, A.S.Zolotarova

Measurement of the 2νββ Decay Rate and Spectral Shape of 100Mo from the CUPID-Mo Experiment

RADIOACTIVITY 100Mo(2β-); measured decay products, Eβ, Iβ; deduced two-neutrino mode T1/2, shape factor, effective axial vector coupling constant. Comparison with theoretical predictions for different nuclear models. The CUPID-Mo experiment.

doi: 10.1103/PhysRevLett.131.162501
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2023AZ05      Phys.Rev.Lett. 131, 222501 (2023)

O.Azzolini, J.W.Beeman, F.Bellini, M.Beretta, M.Biassoni, C.Brofferio, C.Bucci, S.Capelli, V.Caracciolo, L.Cardani, P.Carniti, N.Casali, E.Celi, D.Chiesa, M.Clemenza, I.Colantoni, O.Cremonesi, A.Cruciani, A.D'Addabbo, I.Dafinei, S.Di Domizio, V.Dompe, G.Fantini, F.Ferroni, L.Gironi, A.Giuliani, P.Gorla, C.Gotti, G.Keppel, J.Kotila, M.Martinez, S.S.Nagorny, M.Nastasi, S.Nisi, C.Nones, D.Orlandi, L.Pagnanini, M.Pallavicini, L.Pattavina, M.Pavan, G.Pessina, V.Pettinacci, S.Pirro, S.Pozzi, E.Previtali, A.Puiu, A.Ressa, C.Rusconi, K.Schaffner, C.Tomei, M.Vignati, A.S.Zolotarova

Measurement of the 2νββ Decay Half-Life of 82Se with the Global CUPID-0 Background Model

RADIOACTIVITY 82Se(2β-); measured decay products, Eβ, Iβ; deduced two-neutrino mode T1/2 using the global CUPID-0 background model. The Laboratori Nazionali del Gran Sasso (LNGS), in Italy.

doi: 10.1103/PhysRevLett.131.222501
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2023GE04      Phys.Rev. C 108, 045502 (2023)

Z.Ge, T.Eronen, A.de Roubin, M.Ramalho, J.Kostensalo, J.Kotila, J.Suhonen, D.A.Nesterenko, A.Kankainen, P.Ascher, O.Beliuskina, M.Flayol, M.Gerbaux, S.Grevy, M.Hukkanen, A.Husson, A.Jaries, A.Jokinen, I.D.Moore, P.Pirinen, J.Romero, M.Stryjczyk, V.Virtanen, A.Zadvornaya

β- decay Q-value measurement of 136Cs and its implications for neutrino studies

doi: 10.1103/PhysRevC.108.045502
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2023GI07      Universe 9, 270 (2023)

P.Gimeno, L.Jokiniemi, J.Kotila, M.Ramalho, J.Suhonen

Ordinary Muon Capture on 136Ba: Comparative Study Using the Shell Model and pnQRPA

NUCLEAR REACTIONS 136Ba(μ, X)136Cs, E not given; calculated energy levels, J, π using the interacting shell model (ISM) and proton–neutron quasiparticle random-phase approximation (pnQRPA). Comparison with available data.

doi: 10.3390/universe9060270
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2023JO01      Phys.Rev. C 107, 014327 (2023)

L.Jokiniemi, T.Miyagi, S.R.Stroberg, J.D.Holt, J.Kotila, J.Suhonen

Ab initio calculation of muon capture on 24Mg

NUCLEAR REACTIONS 24Mg(μ-, ν), E at rest; calculated nuclear matrix elements, capture rates to the lowest levels of 24Na. Valence-space in-medium similarity renormalization group (VS-IMSRG) and nuclear shell model calculations. Comparison to experimental data.

NUCLEAR STRUCTURE 24Mg, 24Na; calculated levels, J, π, B(E2), B(M1), magnetic dipole moments. 24Mg; calculated electric quadrupole moments.

RADIOACTIVITY 24Na(β-); calculated log ft values for decay to excited states in 24Mg.

doi: 10.1103/PhysRevC.107.014327
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2023JO02      Phys.Lett. B 838, 137689 (2023)

L.Jokiniemi, B.Romeo, C.Brase, J.Kotila, P.Soriano, A.Schwenk, J.Menendez

Two-neutrino ββ decay of 136Xe to the first excited 0+ state in 136Ba

RADIOACTIVITY 136Xe(2β-); calculated nuclear matrix element for the two-neutrino ββ decay of 136Xe into the first excited state of 136Ba using the quasiparticle random-phase approximation (QRPA) framework, the nuclear shell model, the interacting boson model (IBM-2), and an effective field theory (EFT) for β and ββ decays; deduced T1/2.

doi: 10.1016/j.physletb.2023.137689
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2023KO06      Phys.Lett. B 840, 137894 (2023)

J.Kostensalo, J.Kotila, J.Suhonen

Microscopic calculation of the β- decays of 151Sm, 171Tm, and 210Pb with implications to detection of the cosmic neutrino background

RADIOACTIVITY 151Sm, 171Tm, 210Pb(β-); calculated electron spectral shapes corresponding to the low-Q β--decay transitions using beta-decay theory with several refinements for these first-forbidden nonunique (ff-nu) transitions with transition nuclear matrix elements (NMEs) computed by using the microscopic Interacting Boson-Fermion Model (IBFM-2) and the nuclear shell model (NSM).

doi: 10.1016/j.physletb.2023.137894
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2022ER01      Phys.Lett. B 830, 137135 (2022)

T.Eronen, Z.Ge, A.de Roubin, M.Ramalho, J.Kostensalo, J.Kotila, O.Beliushkina, C.Delafosse, S.Geldhof, W.Gins, M.Hukkanen, A.Jokinen, A.Kankainen, I.D.Moore, D.A.Nesterenko, M.Stryjczyk, J.Suhonen

High-precision measurement of a low Q value for allowed β-decay of 131I related to neutrino mass determination

RADIOACTIVITY 131I(β-) [from U(p, X), E=30 MeV]; measured cyclotron frequency ratios; deduced Q-value, partial T1/2 for the transition. Comparison with the Atomic Mass Evaluation 2020, theoretical calculations. The double Penning trap mass spectrometer JYFLTRAP at the IGISOL facility, the K-130 cyclotron.

doi: 10.1016/j.physletb.2022.137135
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2022GE07      Phys.Rev. C 106, 015502 (2022)

Z.Ge, T.Eronen, A.de Roubin, J.Kostensalo, J.Suhonen, D.A.Nesterenko, O.Beliuskina, R.de Groote, C.Delafosse, S.Geldhof, W.Gins, M.Hukkanen, A.Jokinen, A.Kankainen, J.Kotila, A.Koszorus, I.D.Moore, A.Raggio, S.Rinta-Antila, V.Virtanen, A.P.Weaver, A.Zadvornaya

Direct determination of the atomic mass difference of the pairs 76As-76Se and 155Tb-155Gd rules out 76As and 155Tb as possible candidates for electron (anti)neutrino mass measurements

ATOMIC MASSES 76As, 76Se; 155Tb, 155Gd; measured cyclotron frequency ratios using phase-imaging ion-cyclotron-resonance technique (PI-ICR) and high-precision Penning-trap mass spectrometry (PTMS) with a double Penning trap mass spectrometer (JYFLTRAP) at the IGISOL facility of the University of Jyvaskyla; deduced precise Q(β) values for 76As β- decay to 76Se and 155Tb ϵ decay to 155Gd. Comparison with evaluated data in AME2020.

RADIOACTIVITY 76As(β-); 155Tb(EC); deduced precise Q(β) values from measurements of difference in mass excesses of 76As, 76Se, and 155Tb, 155Gd pairs; excluded these two cases as potential candidates for the search of ultra-low Q values for determination of electron-(anti)neutrino mass. Comparison with evaluated data in AME2020.

doi: 10.1103/PhysRevC.106.015502
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2022GE11      Phys.Lett. B 832, 137226 (2022)

Z.Ge, T.Eronen, A.de Roubin, K.S.Tyrin, L.Canete, S.Geldhof, A.Jokinen, A.Kankainen, J.Kostensalo, J.Kotila, M.I.Krivoruchenko, I.D.Moore, D.A.Nesterenko, J.Suhonen, M.Vilen

High-precision electron-capture Q value measurement of 111In for electron-neutrino mass determination

RADIOACTIVITY 111In(EC) [from In(p, X), E=130 MeV]; measured Ramsey time-of-flight ion-cyclotron resonance (TOF-ICR), cyclotron frequency ratios; deduced Q-values to the ground and excited states. Comparison with AME2020 and the microscopic interacting boson-fermion model (IBFM-2) calculations. Ion Guide Isotope Separator On-Line facility (IGISOL) utilizing the JYFLTRAP double Penning trap mass spectrometer.

doi: 10.1016/j.physletb.2022.137226
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2022LE06      Phys.Rev. C 105, 045801 (2022)

B.Lehnert, M.Hult, G.Lutter, G.Marissens, S.Oberstedt, H.Stroh, J.Kotila, A.Oberstedt, K.Zuber

Constraints on partial half-lives of 136Ce and 138Ce double electron captures

RADIOACTIVITY 136Ce(2EC), (β+EC); 138Ce(2EC); measured Eγ, Iγ; deduced constraints on the T1/2 of various decay modes including neutrinoless (0νKL and 0νLL to the ground state for 138Ce, 0νKL, 0νLL and 0νKK to ground and excited states for 136Ce). CeBr3 crystal with mass 4381 g measured with HPGe coaxial detector over three years at the HADES underground laboratory. Comparison to other experimental data and theoretical predictions.

doi: 10.1103/PhysRevC.105.045801
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2022LE14      Phys.Rev.Lett. 129, 232502 (2022)

A.F.Leder, D.Mayer, J.L.Ouellet, F.A.Danevich, L.Dumoulin, A.Giuliani, J.Kostensalo, J.Kotila, P.de Marcillac, C.Nones, V.Novati, E.Olivieri, D.Poda, J.Suhonen, V.I.Tretyak, L.Winslow, A.Zolotarova

Determining gA/gV with High-Resolution Spectral Measurements Using a LiInSe2 Bolometer

RADIOACTIVITY 115In(β-); measured decay products, Eβ, Iβ; deduced the axial vector coupling constant, T1/2. Comparison with theoretical calculations, available data.

doi: 10.1103/PhysRevLett.129.232502
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2022NE04      Eur.Phys.J. A 58, 44 (2022)

D.A.Nesterenko, L.Jokiniemi, J.Kotila, A.Kankainen, Z.Ge, T.Eronen, S.Rinta-Antila, J.Suhonen

High-precision Q-value measurement and nuclear matrix element calculations for the double-β decay of 98Mo

ATOMIC MASSES 98Mo; measured cyclotron frequencies; deduced double-beta decay Q-value; calculated nuclear matrix elements using the proton-neutron quasiparticle random-phase approximation (pnQRPA) and the microscopic interacting boson model (IBM-2) frameworks. The JYFLTRAP Penning trap mass spectrometer.

doi: 10.1140/epja/s10050-022-00695-w
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2022RA20      Phys.Rev. C 106, 015501 (2022)

M.Ramalho, Z.Ge, T.Eronen, D.A.Nesterenko, J.Jaatinen, A.Jokinen, A.Kankainen, J.Kostensalo, J.Kotila, M.I.Krivoruchenko, J.Suhonen, K.S.Tyrin, V.Virtanen

Observation of an ultralow-Q-value electron-capture channel decaying to 75As via a high-precision mass measurement

ATOMIC MASSES 75As, 76Ge; 77Se, 76Se; 94Mo, 95Mo; measured cyclotron frequency ratios using phase-imaging ion-cyclotron-resonance technique (PI-ICR) and high-precision Penning-trap mass spectrometry (PTMS) with a double Penning trap mass spectrometer (JYFLTRAP) at the IGISOL facility of the University of Jyvaskyla; deduced precise Q(β) values for decays of 75Se and 75Ge to 75As, with three ultra-low Q-value energetically valid β transitions, one of which as a possible candidate for antineutrino mass determination. Comparison with evaluated data in AME2020.

RADIOACTIVITY 75Se(EC); 75Ge(β-); deduced precise Q(β) values from measurements of difference in mass excesses of 75As and 76Ge, and three ultra-low Q-value energetically valid β transitions, with one as a possible candidate for antineutrino mass determination. Comparison with evaluated data in AME2020.

NUCLEAR STRUCTURE 75As; calculated levels, J, π using shell-model code NUSHELLX in a single-particle model space consisting of 1f5/2, 2p3/2, 2p1/2, and 1g9/2 neutron and proton orbitals, with jun45pn and jj44bpn interactions, and compared results with experimental data.

doi: 10.1103/PhysRevC.106.015501
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2021GE04      Phys.Rev. C 103, 065502 (2021)

Z.Ge, T.Eronen, A.de Roubin, D.A.Nesterenko, M.Hukkanen, O.Beliuskina, R.de Groote, S.Geldhof, W.Gins, A.Kankainen, A.Koszorus, J.Kotila, J.Kostensalo, I.D.Moore, A.Raggio, S.Rinta-Antila, J.Suhonen, V.Virtanen, A.P.Weaver, A.Zadvornaya, A.Jokinen

Direct measurement of the mass difference of 72As - 72Ge rules out 72As as a promising β-decay candidate to determine the neutrino mass

ATOMIC MASSES 72As; measured cyclotron frequency and mass excess by phase-imaging ion-cyclotron-resonance (PI-ICR) technique using IGISOL facility and JYFLTRAP double Penning trap mass spectrometer at the K-130 cyclotron of the University of Jyvaskyla, with the production of 72As in Ge(d, X), E=9 MeV reaction. 72As, 72Ge; deduced precise Q values for ϵ decay between the ground state of 72As and ground as well as excited states of 72Ge. Relevance to electron neutrino mass determination through precise mass measurements.

doi: 10.1103/PhysRevC.103.065502
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2021GE11      Phys.Rev.Lett. 127, 272301 (2021)

Z.Ge, T.Eronen, K.S.Tyrin, J.Kotila, J.Kostensalo, D.A.Nesterenko, O.Beliuskina, R.de Groote, A.de Roubin, S.Geldhof, W.Gins, M.Hukkanen, A.Jokinen, A.Kankainen, A.Koszorus, M.I.Krivoruchenko, S.Kujanpaa, I.D.Moore, A.Raggio, S.Rinta-Antila, J.Suhonen, V.Virtanen, A.P.Weaver, A.Zadvornaya

159Dy Electron-Capture: A New Candidate for Neutrino Mass Determination

RADIOACTIVITY 159Dy(EC); measured frequencies; deduced Q-values for allowed Gamow-Teller transition, J, π, total decay constant. The Ion Guide Isotope Separator On-Line facility (IGISOL) using the double Penning trap mass spectrometer JYFLTRAP in the accelerator laboratory of the University of Jyvaskyla.

doi: 10.1103/physrevlett.127.272301
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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
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2021KO10      Phys.Rev. C 103, 044302 (2021)

J.Kotila, F.Iachello

Nuclear matrix elements for Majoron-emitting double-β decay

RADIOACTIVITY 76Ge, 82Se, 96Zr, 100Mo, 110Pd, 116Cd, 124Sn, 128,130Te, 134,136Xe, 148,150Nd, 154Sm, 160Gd, 198Pt, 232Th, 238U(2β-); calculated nuclear matrix elements (NMEs) for Majoron-emitting neutrinoless double-beta decay, limits on the Majoron-neutrino coupling constants for neutrino-less ββ decay of 76Ge, 130Te and 136Xe. Calculations based on interacting Boson Model IBM-2.

doi: 10.1103/PhysRevC.103.044302
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2021KO46      Universe 7, 66 (2021)

J.Kotila

Role of Single-Particle Energies in Microscopic Interacting Boson Model Double Beta Decay Calculations

doi: 10.3390/universe7030066
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2020AR09      Eur.Phys.J. C 80, 674 (2020)

E.Armengaud, C.Augier, A.S.Barabash, F.Bellini, G.Benato, A.Benoit, M.Beretta, L.Berge, J.Billard, Yu.A.Borovlev, Ch.Bourgeois, M.Briere, V.Brudanin, P.Camus, L.Cardani, N.Casali, A.Cazes, M.Chapellier, F.Charlieux, M.de Combarieu, I.Dafinei, F.A.Danevich, M.De Jesus, L.Dumoulin, K.Eitel, E.Elkhoury, F.Ferri, B.K.Fujikawa, J.Gascon, L.Gironi, A.Giuliani, V.D.Grigorieva, M.Gros, E.Guerard, D.L.Helis, H.Z.Huang, R.Huang, J.Johnston, A.Juillard, H.Khalife, M.Kleifges, V.V.Kobychev, Yu.G.Kolomensky, S.I.Konovalov, A.Leder, J.Kotila, P.Loaiza, L.Ma, E.P.Makarov, P.de Marcillac, L.Marini, S.Marnieros, D.Misiak, X.-F.Navick, C.Nones, V.Novati, E.Olivieri, J.L.Ouellet, L.Pagnanini, P.Pari, L.Pattavina, B.Paul, M.Pavan, H.Peng, G.Pessina, S.Pirro, D.V.Poda, O.G.Polischuk, E.Previtali, T.Redon, S.Rozov, C.Rusconi, V.Sanglard, K.Schaffner, B.Schmidt, Y.Shen, V.N.Shlegel, B.Siebenborn, V.Singh, C.Tomei, V.I.Tretyak, V.I.Umatov, L.Vagneron, M.Velazquez, M.Weber, B.Welliver, L.Winslow, M.Xue, E.Yakushev, A.S.Zolotarova

Precise measurement of 2νββ decay of 100Mo with the CUPID-Mo detection technology

RADIOACTIVITY 100Mo(2β-); measured decay products, Eβ, Iβ; deduced T1/2. Comparison with available data.

doi: 10.1140/epjc/s10052-020-8203-4
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2020FE11      Phys.Rev. C 102, 054329 (2020)

J.Ferretti, J.Kotila, R.I.Magana Vsevolodovna, E.Santopinto

β-decay rates of 115, 117Rh into 115, 117Pd isotopes in the microscopic interacting boson-fermion model

NUCLEAR STRUCTURE 115,117Pd; calculated neutron and proton single-particle energies, levels, J, π, β-decay rates from 115,117Rh decays using neutron-proton interacting boson-fermion model (IBFM-2); deduced spin-parity for ground states. Comparison with experimental data.

RADIOACTIVITY 115,117Rh(β-); calculated β-decay half-lives and logft values using IBFM-2. Comparison with available experimental data.

doi: 10.1103/PhysRevC.102.054329
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2019AZ04      Phys.Rev.Lett. 123, 262501 (2019)

O.Azzolini, J.W.Beeman, F.Bellini, M.Beretta, M.Biassoni, C.Brofferio, C.Bucci, S.Capelli, L.Cardani, P.Carniti, N.Casali, D.Chiesa, M.Clemenza, O.Cremonesi, A.Cruciani, I.Dafinei, S.Di Domizio, F.Ferroni, L.Gironi, A.Giuliani, P.Gorla, C.Gotti, G.Keppel, J.Kotila, M.Martinez, S.Nagorny, M.Nastasi, S.Nisi, C.Nones, D.Orlandi, L.Pagnanini, M.Pallavicini, L.Pattavina, M.Pavan, G.Pessina, V.Pettinacci, S.Pirro, S.Pozzi, E.Previtali, A.Puiu, C.Rusconi, K.Schaffner, C.Tomei, M.Vignati, A.Zolotarova

Evidence of Single State Dominance in the Two-Neutrino Double-β Decay of 82Se with CUPID-0

RADIOACTIVITY 82Se(2β-); measured decay products, Eβ, Iβ; deduced two-neutrino mode T1/2. Comparison with available data.

doi: 10.1103/PhysRevLett.123.262501
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2019PI11      Nucl.Phys. A992, 121624 (2019)

P.Pirinen, J.Kotila, J.Suhonen

Spin-dependent WIMP-nucleus scattering off 125Te, 129Xe, and 131Xe in the microscopic interacting boson-fermion model

NUCLEAR REACTIONS 125,129,131Xe(ν, ν), (ν, ν'), E not given;calculated elastic, inelastic spin-dependent scattering using microscopic Interacting Boson-Fermion Model (IBFM-2) σ(θ), 126,130,132Xe total σ, levels, ∼, π, B(M1), magnetic moments, proton-only and neutron-only spin structure functions. Results compared with earlier Shell Model and with Interacting Boson-Fermion Model (IBFM); deduced model parameters.

doi: 10.1016/j.nuclphysa.2019.121624
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2017HA06      Phys.Rev. C 95, 024327 (2017)

M.Haaranen, J.Kotila, J.Suhonen

Spectrum-shape method and the next-to-leading-order terms of the β-decay shape factor

RADIOACTIVITY 113Cd, 115In(β-); calculated leading-order (Lo) and next-to-leading-order (NLO) nuclear matrix elements (NMEs) of fourth-forbidden ground-state to ground-state β transitions, partial half-lives as a function of axial-vector coupling constant gA, with vector coupling constant gV=1, β spectra and shape factors; deduced effective values of gA. Spectrum-shape method (SSM), with three nuclear-structure theory frameworks: nuclear shell model (NSM), microscopic interacting boson-fermion model (IBM), and microscopic quasiparticle-phonon model (MQPM). Comparison with experimental β spectra.

doi: 10.1103/PhysRevC.95.024327
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2016KO28      Phys.Rev. C 94, 034320 (2016)

J.Kotila, J.Barea

Occupation probabilities of single particle levels using the microscopic interacting boson model: Application to some nuclei of interest in neutrinoless double-β decay

NUCLEAR STRUCTURE 76Ge, 76Se; 100Mo, 100Ru; 128Te, 128Xe; 130Te, 130Xe; 136Xe, 136Ba; 150Nd, 150Sm; calculated neutron and proton occupancies and change in occupancies between the pair of nuclei involved for example in double-beta decay using microscopic interacting boson model IBM-2 approach. Comparison with BCS, (interacting) shell model (ISM), and available experimental data. Relevance to ground-state occupancies of valence protons and neutrons of double-β decay nuclei with A=76, 100, 128, 130, 136 and 150.

doi: 10.1103/PhysRevC.94.034320
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2015BA12      Phys.Rev. C 91, 034304 (2015)

J.Barea, J.Kotila, F.Iachello

0νββ and 2νββ nuclear matrix elements in the interacting boson model with isospin restoration

doi: 10.1103/PhysRevC.91.034304
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2015KO15      Phys.Rev. C 91, 064310 (2015)

J.Kotila, J.Barea, F.Iachello

Phase-space factors and half-life predictions for Majoron-emitting β-β- decay

RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 110Pd, 116Cd, 124Sn, 128,130Te, 134,136Xe, 148,150Nd, 154Sm, 160Gd, 198Pt, 232Th, 238U(2β-); calculated Phase space factors using screened exact finite size Coulomb wave functions, half-lives for Majoron-emitting double-beta decay, single electron spectra, summed electron spectra, and angular correlations between the two outgoing electrons for 136Xe 0νββM decay mode. Comparison with experimental data for half-lives.

doi: 10.1103/PhysRevC.91.064310
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2014KO16      Phys.Rev. C 89, 064304 (2014)

J.Kotila, S.M.Lenzi

Collective features of Cr and Fe isotopes

NUCLEAR STRUCTURE 54,56,58,60,62,64Cr, 56,58,60,62,64,66Fe; calculated levels, J, π, B(E2), E(4+)/E(2+), E(6+)/E(4+), quadrupole moment, energy surface contours in (β-γ) plane. Proton-neutron interacting boson model (IBM-2) and interacting shell model (ISM). Discussed shape transition from a spherical vibrator to γ-soft rotor with 58Cr located at the critical point. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.064304
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2014KO18      Phys.Rev. C 89, 064319 (2014)

J.Kotila, J.Barea, F.Iachello

Neutrinoless double-electron capture

RADIOACTIVITY 124Xe, 152Gd, 156Dy, 164Er, 180W(2EC); calculated prefactors, nuclear matrix elements, half-lives for 0νϵϵ decay mode for light and heavy neutrino exchange. IBM-2 model and Argonne short-range correlation (SRC).

NUCLEAR STRUCTURE 124Xe, 124Te, 152Gd, 152Sm, 156Dy, 156Gd, 164Er, 164Dy, 180W, 180Hf; calculated levels, J, π using microscopic interacting boson model (IBM-2). Comparison with experimental data.

doi: 10.1103/PhysRevC.89.064319
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2013BA05      Phys.Rev. C 87, 014315 (2013)

J.Barea, J.Kotila, F.Iachello

Nuclear matrix elements for double-β decay

RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 110Pd, 116Cd, 124Sn, 128,130Te, 148,150Nd, 154Sm, 160Gd, 198Pt(2β-); calculated nuclear matrix elements, half-lives for neutrinoless and two-neutrino double-β decay; deduced limits on ν mass from experiments and calculations, gA, gV. Microscopic interacting boson model (IBM-2). Light neutrino and heavy neutrino exchange. Comparison with QRPA-Tu and ISM calculation.

doi: 10.1103/PhysRevC.87.014315
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2013BA18      Phys.Rev. C 87, 057301 (2013)

J.Barea, J.Kotila, F.Iachello

Neutrinoless double-positron decay and positron-emitting electron capture in the interacting boson model

RADIOACTIVITY 58Ni, 64Zn, 78Kr, 96Ru, 106Cd, 124Xe, 130Ba, 136Ce(2β+), (2EC), (β+EC); calculated nuclear matrix elements for 0νββ, 0νϵβ, and 0νϵϵ decay modes, half-lives. Microscopic interacting boson model (IBM-2).

doi: 10.1103/PhysRevC.87.057301
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2013BE38      Phys.Rev.Lett. 111, 172501 (2013)

J.Beller, N.Pietralla, J.Barea, M.Elvers, J.Endres, C.Fransen, J.Kotila, O.Moller, A.Richter, T.R.Rodriguez, C.Romig, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, V.Werner, A.Zilges, M.Zweidinger

Constraint on 0νββ Matrix Elements from a Novel Decay Channel of the Scissors Mode: The Case of 154Gd

NUCLEAR REACTIONS 154Gd(γ, γ'), E<4.5 MeV; measured reaction products, Eγ, Iγ; deduced level energies, J, π, B(M1), B(E1). Comparison with IBM-2 and EDF calculations.

RADIOACTIVITY 154Sm(2β-); calculated neutrinoless nuclear matrix elements.

doi: 10.1103/PhysRevLett.111.172501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2013KO08      Phys.Rev. C 87, 024313 (2013)

J.Kotila, F.Iachello

Phase space factors for β+β+ decay and competing modes of double-β decay

RADIOACTIVITY 78Kr, 96Ru, 106Cd, 124Xe, 130Ba, 136Ce(2β+), (β+EC), (2EC); 50Cr, 58Ni, 64Zn, 74Se, 84Sr, 92Mo, 102Pd, 112Sn, 120Te, 144Sm, 156Dy, 162Er, 168Yb, 174Hf, 184Os, 190Pt(β+EC), (2EC); 40Ca, 54Fe, 108Cd, 126Xe, 132Ba, 138Ce, 158Dy, 180W, 196Hg(2EC); calculated phase space factors, positron spectra, angular correlations between two outgoing positrons, effective nuclear matrix elements for 2νββ decay using Dirac wave functions with finite nuclear size and electron screening. Comparison with previous theoretical studies.

doi: 10.1103/PhysRevC.87.024313
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2012BA30      Phys.Rev.Lett. 109, 042501 (2012)

J.Barea, J.Kotila, F.Iachello

Limits on Neutrino Masses from Neutrinoless Double-β Decay

RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 110Pd, 116Cd, 124Sn, 128,130Te, 136Xe, 148,150Nd, 154Sm, 160Gd, 198Pt(2β-); analyzed theoretical and experimental data; calculated neutrinoless nuclear matrix elements; deduced neutrino mass limits.

doi: 10.1103/PhysRevLett.109.042501
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2012FI01      Phys.Rev.Lett. 108, 062502 (2012)

D.Fink, J.Barea, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, F.Herfurth, A.Herlert, J.Kotila, M.Kowalska, S.Kreim, D.Lunney, S.Naimi, M.Rosenbusch, S.Schwarz, L.Schweikhard, F.Simkovic, J.Stanja, K.Zuber

Q Value and Half-Lives for the Double-β-Decay Nuclide 110Pd

RADIOACTIVITY 110Pd(2β-); measured resonance frequencies;deduced precise Q-value. Comparison with AME2003 atomic mass evaluation, phase-space factor calculations.

doi: 10.1103/PhysRevLett.108.062502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2012KO10      Phys.Rev. C 85, 034316 (2012)

J.Kotila, F.Iachello

Phase-space factors for double-β decay

RADIOACTIVITY 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 110Pd, 116Cd, 124Sn, 128Te, 130Te, 136Xe, 148Nd, 150Nd, 154Sm, 160Gd, 198Pt, 232Th, 238U(2β-); calculated phase-space factors, Single-electron spectra, summed energy spectra, half-lives, angular correlations, effective nuclear matrix elements for 2νββ and 0νββ decay modes. Exact Dirac wave functions with finite nuclear size and electron screening. Comparison with previous studies and experimental data.

doi: 10.1103/PhysRevC.85.034316
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2012KO17      Phys.Rev. C 85, 054309 (2012)

J.Kotila, K.Nomura, L.Guo, N.Shimizu, T.Otsuka

Shape phase transitions in the interacting boson model: Phenomenological versus microscopic descriptions

NUCLEAR STRUCTURE 148,150,152,154,156,158,160Gd, 150,152,154,156,158,160,162Dy; calculated levels, J, π, B(E2), quadrupole moments for 2+ states, S(2n), potential energy surfaces in β-γ plane, R(first 4+/first 2+) and R(first 6+/second 0+) ratios. Shape phase transitions, X(5) critical-point nuclei. Phenomenological and microscopic proton-neutron interacting boson model (IBM) calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.054309
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2010KO01      J.Phys.(London) G37, 015101 (2010)

J.Kotila, J.Suhonen, D.S.Delion

Description of the two-neutrino ββ decay of 100Mo by pnMAVA

NUCLEAR STRUCTURE 100Mo; calculated Gamow-Teller strength functions, nuclear matrix elements for two-neutrino 2β-decay, T1/2. Microscopic anharmonic vibrator approach (MAVA), comparison with available data.

doi: 10.1088/0954-3899/37/1/015101
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2006KO01      Nucl.Phys. A765, 354 (2006)

J.Kotila, J.Suhonen, D.S.Delion

Study of the low-lying collective states in 94-100Mo isotopes using the MAVA

NUCLEAR STRUCTURE 94,96,98,100Mo; calculated two-phonon states energies, configurations, transitions B(E2). Microscopic anharmonic vibrator approach, comparison with data.

doi: 10.1016/j.nuclphysa.2005.11.009
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2006KO21      Czech.J.Phys. 56, 473 (2006)

J.Kotila, J.Suhonen, D.S.Delion

Study of low-lying collective states using a Microscopic Anharmonic Vibrator Approach

NUCLEAR STRUCTURE 98,100,102,104,106Ru; calculated two-phonon states energies, B(E2) ratios. Microscopic anharmonic vibrator approach.

doi: 10.1007/s10582-006-0111-9
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2003KO36      Phys.Rev. C 68, 014307 (2003)

J.Kotila, J.Suhonen, D.S.Delion

Microscopic calculation of the electric decay properties of low-energy vibrational states in even 110-120Cd isotopes

NUCLEAR STRUCTURE 110,112,114,116,118,120Cd; calculated two-phonon states energies, configurations, transitions B(E2). Microscopic formalism, comparison with data.

doi: 10.1103/PhysRevC.68.014307
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2003KO70      Phys.Rev. C 68, 054322 (2003)

J.Kotila, J.Suhonen, D.S.Delion

Low-lying collective states in 98-106Ru isotopes studied using a microscopic anharmonic vibrator approach

NUCLEAR STRUCTURE 98,100,102,104,106Ru; calculated levels, J, π, collective states features. Microscopic anharmonic vibrator approach, comparisons with data.

doi: 10.1103/PhysRevC.68.054322
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