NSR Query Results
Output year order : Descending NSR database version of March 18, 2024. Search: Author = A.Lennarz Found 45 matches. 2024PA09 Phys.Rev. C 109, 015802 (2024) S.N.Paneru, C.R.Brune, D.Connolly, D.Odell, M.Poudel, D.R.Phillips, J.Karpesky, B.Davids, C.Ruiz, A.Lennarz, U.Greife, M.Alcorta, R.Giri, M.Lovely, M.Bowry, M.Delgado, N.E.Esker, A.B.Garnsworthy, C.Seeman, P.Machule, J.Fallis, A.A.Chen, F.Laddaran, A.Firmino, C.Weinerman Elastic scattering of 3He+4He with the SONIK scattering chamber
doi: 10.1103/PhysRevC.109.015802
2023DI06 Eur.Phys.J. A 59, 105 (2023) I.Dillmann, O.Kester, R.Baartman, A.Chen, T.Junginger, F.Herwig, D.Kaltchev, A.Lennarz, T.Planche, C.Ruiz, N.Vassh Measuring neutron capture cross sections of radioactive nuclei
doi: 10.1140/epja/s10050-023-01012-9
2023WI02 Phys.Rev. C 107, 035803 (2023) M.Williams, B.Davids, G.Lotay, N.Nishimura, T.Rauscher, S.A.Gillespie, M.Alcorta, A.M.Amthor, G.C.Ball, S.S.Bhattacharjee, V.Bildstein, W.N.Catford, D.T.Doherty, N.E.Esker, A.B.Garnsworthy, G.Hackman, K.Hudson, A.Lennarz, C.Natzke, B.Olaizola, A.Psaltis, C.E.Svensson, J.Williams, D.Walter, D.Yates Cross sections of the 83Rb(p, γ)84Sr and 84Kr(p, γ)85Rb reactions at energies characteristic of the astrophysical γ process NUCLEAR REACTIONS 1H(83Rb, γ)84Sr, E=2.4, 2.7 MeV/nucleon; 1H(84Kr, γ)85Rb, E=2.7 MeV/nucleon; measured Eγ, Iγ, (recoil)γ-coin; deduced σ(E). 1H(83Rb, γ)84Sr, E=2.4, 2.7 MeV/nucleon; deduced thermonuclear reaction rate. Comparison to SMARAGD and NON-SMOKER calculations. Relevance to the abundance of 84Sr produced during the γ process in supernovae. The EMMA recoil mass spectrometer with 12 Compton-suppressed HPGe detectors of the TIGRESS array at ISAC-II facility of TRIUMF.
doi: 10.1103/PhysRevC.107.035803
2022AL01 J.Phys.(London) G49, 010501 (2022) M.Aliotta, R.Buompane, M.Couder, A.Couture, R.J.deBoer, A.Formicola, L.Gialanella, J.Glorius, G.Imbriani, M.Junker, C.Langer, A.Lennarz, Y.A.Litvinov, W.-P.Liu, M.Lugaro, C.Matei, Z.Meisel, L.Piersanti, R.Reifarth, D.Robertson, A.Simon, O.Straniero, A.Tumino, M.Wiescher, Y.Xu The status and future of direct nuclear reaction measurements for stellar burning NUCLEAR REACTIONS 12C(α, γ), 22Ne(α, n), (α, γ), 12C(12C, X), E(cm)<7 MeV; analyzed available data; deduced σ, S-factors.
doi: 10.1088/1361-6471/ac2b0f
2022LO01 Phys.Rev.Lett. 128, 042701 (2022) G.Lotay, A.Lennarz, C.Ruiz, C.Akers, A.A.Chen, G.Christian, D.Connolly, B.Davids, T.Davinson, J.Fallis, D.A.Hutcheon, P.Machule, L.Martin, D.J.Mountford, A.St.J.Murphy Radiative Capture on Nuclear Isomers: Direct Measurement of the 26mAl(p, γ)27Si Reaction NUCLEAR REACTIONS 1H(26Al, γ), E=390 keV/nucleon; measured reaction products, Eγ, Iγ; deduced resonance energies and parameters, astrophysical reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.128.042701
2022PS02 Phys.Rev.Lett. 129, 162701 (2022) A.Psaltis, A.A.Chen, R.Longland, D.S.Connolly, C.R.Brune, B.Davids, J.Fallis, R.Giri, U.Greife, D.A.Hutcheon, L.Kroll, A.Lennarz, J.Liang, M.Lovely, M.Luo, C.Marshall, S.N.Paneru, A.Parikh, C.Ruiz, A.C.Shotter, M.Williams Direct Measurement of Resonances in 7Be(α, γ)11C Relevant to νp-Process Nucleosynthesis NUCLEAR REACTIONS 4He(7Be, γ)11C, E not given; measured reaction products, Eγ, Iγ; deduced resonance energies and strengths, thermonuclear reaction rates. Comparison with available data. DRAGON recoil separator, TRIUMF.
doi: 10.1103/PhysRevLett.129.162701
2022PS03 Phys.Rev. C 106, 045805 (2022) A.Psaltis, A.A.Chen, R.Longland, D.S.Connolly, C.R.Brune, B.Davids, J.Fallis, R.Giri, U.Greife, D.A.Hutcheon, L.Kroll, A.Lennarz, J.Liang, M.Lovely, M.Luo, C.Marshall, S.N.Paneru, A.Parikh, C.Ruiz, A.C.Shotter, M.Williams First inverse kinematics measurement of resonances in 7Be(α, γ)11C relevant to neutrino-driven wind nucleosynthesis using DRAGON NUCLEAR REACTIONS 4He(7Be, γ), E=351-464 keV/nucleon; measured reaction products, Eγ, Iγ, γ-sum, (particle)γ-coin; deduced 1110-, 1115- and 876-keV resonances strength, thermonuclear reaction rate (T=0.1-10 GK), astrophysical S-factor. Discussed the impact of newly determined rates on studies of nucleosynthesis in neutrino-driven winds. Helium-filled windowless gas target surrounded by γ-ray array of 30 BGO scintillator crystals at DRAGON recoil separator (TRIUMF).
doi: 10.1103/PhysRevC.106.045805
2022SC17 J.Phys.(London) G49, 110502 (2022) H.Schatz, A.D.Becerril Reyes, A.Best, E.F.Brown, K.Chatziioannou, K.A.Chipps, C.M.Deibel, R.Ezzeddine, D.K.Galloway, C.J.Hansen, F.Herwig, A.P.Ji, M.Lugaro, Z.Meisel, D.Norman, J.S.Read, L.F.Roberts, A.Spyrou, I.Tews, F.X.Timmes, C.Travaglio, N.Vassh, C.Abia, P.Adsley, S.Agarwal, M.Aliotta, W.Aoki, A.Arcones, A.Aryan, A.Bandyopadhyay, A.Banu, D.W.Bardayan, J.Barnes, A.Bauswein, T.C.Beers, J.Bishop, T.Boztepe, B.Cote, M.E.Caplan, A.E.Champagne, J.A.Clark, M.Couder, A.Couture, S.E.de Mink, S.Debnath, R.J.deBoer, J.den Hartogh, P.Denissenkov, V.Dexheimer, I.Dillmann, J.E.Escher, M.A.Famiano, R.Farmer, R.Fisher, C.Frohlich, A.Frebel, C.Fryer, G.Fuller, A.K.Ganguly, S.Ghosh, B.K.Gibson, T.Gorda, K.N.Gourgouliatos, V.Graber, M.Gupta, W.C.Haxton, A.Heger, W.R.Hix, W.C.G.Ho, E.M.Holmbeck, A.A.Hood, S.Huth, G.Imbriani, R.G.Izzard, R.Jain, H.Jayatissa, Z.Johnston, T.Kajino, A.Kankainen, G.G.Kiss, A.Kwiatkowski, M.La Cognata, A.M.Laird, L.Lamia, P.Landry, E.Laplace, K.D.Launey, D.Leahy, G.Leckenby, A.Lennarz, B.Longfellow, A.E.Lovell, W.G.Lynch, S.M.Lyons, K.Maeda, E.Masha, C.Matei, J.Merc, B.Messer, F.Montes, A.Mukherjee, M.R.Mumpower, D.Neto, B.Nevins, W.G.Newton, L.Q.Nguyen, K.Nishikawa, N.Nishimura, F.M.Nunes, E.O'Connor, B.W.O'Shea, W.-J.Ong, S.D.Pain, M.A.Pajkos, M.Pignatari, R.G.Pizzone, V.M.Placco, T.Plewa, B.Pritychenko, A.Psaltis, D.Puentes, Y.-Z.Qian, D.Radice, D.Rapagnani, B.M.Rebeiro, R.Reifarth, A.L.Richard, N.Rijal, I.U.Roederer, J.S.Rojo, J.S K, Y.Saito, A.Schwenk, M.L.Sergi, R.S.Sidhu, A.Simon, T.Sivarani, A.Skuladottir, M.S.Smith, A.Spiridon, T.M.Sprouse, S.Starrfield, A.W.Steiner, F.Strieder, I.Sultana, R.Surman, T.Szucs, A.Tawfik, F.Thielemann, L.Trache, R.Trappitsch, M.B.Tsang, A.Tumino, S.Upadhyayula, J.O.Valle Martinez, M.Van der Swaelmen, C.Viscasillas Vazquez, A.Watts, B.Wehmeyer, M.Wiescher, C.Wrede, J.Yoon, R.G.T.Zegers, M.A.Zermane, M.Zingale, the Horizon 2020 Collaborations Horizons: nuclear astrophysics in the 2020s and beyond
doi: https://dx.doi.org/10.1088/1361-6471/ac8890
2022WI02 Phys.Rev. C 105, 065805 (2022) M.Williams, A.M.Laird, A.Choplin, P.Adsley, B.Davids, U.Greife, K.Hudson, D.Hutcheon, A.Lennarz, C.Ruiz Constraints on key 17O(α, γ)21Ne resonances and impact on the weak s process NUCLEAR REACTIONS 4He(17O, γ)21Ne, E(cm)=1311, 811, 721, 634, 613 keV; measured reaction products, recoiling 21Ne nuclei, (recoil)γ-coin using DRAGON facility of ISAC-I at TRIUMF, and a 4π array of 30 BGO scintillators; deduced time-of-flight (TOF) spectra for resonant yield measurements. 21Ne; deduced levels, resonances, resonance strengths, and compared with previous experimental results. 17O(α, γ)21Ne, T=0.010-10.0 GK; deduced thermonuclear reaction rates using sing the RATESMC Monte Carlo code, and s-process elemental yields.
doi: 10.1103/PhysRevC.105.065805
2021HO15 Phys.Lett. B 822, 136710 (2021) M.Holl, R.Kanungo, Z.H.Sun, G.Hagen, J.A.Lay, A.M.Moro, P.Navratil, T.Papenbrock, M.Alcorta, D.Connolly, B.Davids, A.Diaz Varela, M.Gennari, G.Hackman, J.Henderson, S.Ishimoto, A.I.Kilic, R.Krucken, A.Lennarz, J.Liang, J.Measures, W.Mittig, O.Paetkau, A.Psaltis, S.Quaglioni, J.S.Randhawa, J.Smallcombe, I.J.Thompson, M.Vorabbi, M.Williams Proton inelastic scattering reveals deformation in 8He NUCLEAR REACTIONS 1H(8He, p), E=8.25 MeV/nucleon; measured reaction products, Ep, Ip. 8He; deduced σ(θ), resonance parameters, first 2+ state, quadrupole deformation parameter. Comparison with no-core shell model predictions. Charged particle spectroscopy station IRIS at TRIUMF in Canada.
doi: 10.1016/j.physletb.2021.136710
2021LO09 Phys.Rev. C 103, 055801 (2021) M.Lovely, A.Lennarz, D.Connolly, M.Williams, M.Alcorta, A.A.Chen, B.Davids, N.E.Esker, C.Fry, S.A.Gillespie, R.Giri, U.Greife, A.Hussein, D.Hutcheon, J.Karpesky, L.Kroll, J.Liang, P.D.O'Malley, S.Paneru, A.Psaltis, C.Ruiz, A.C.Shotter, for the DRAGON Collaboration Proton capture on 34S in the astrophysical energy regime of O-Ne novae NUCLEAR REACTIONS 1H(34S, γ)35Cl, E=518.6 keV/nucleon from the ISAC facility of TRIUMF; measured recoils, Eγ, Iγ, TOF using DRAGON separator having four components, windowless gas target, BGO array for γ rays, two stage electromagnetic separator, and heavy ion detector system of double-sided silicon strip detector (DSSSD) and an ionization chamber (IC) for recoils. 35Cl; deduced energies of resonances, resonance strengths, astrophysical reaction rates. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.103.055801
2021LO11 Phys.Rev.Lett. 127, 112701 (2021) G.Lotay, S.A.Gillespie, M.Williams, T.Rauscher, M.Alcorta, A.M.Amthor, C.A.Andreoiu, D.Baal, G.C.Ball, S.S.Bhattacharjee, H.Behnamian, V.Bildstein, C.Burbadge, W.N.Catford, D.T.Doherty, N.E.Esker, F.H.Garcia, A.B.Garnsworthy, G.Hackman, S.Hallam, K.A.Hudson, S.Jazrawi, E.Kasanda, A.R.L.Kennington, Y.H.Kim, A.Lennarz, R.S.Lubna, C.R.Natzke, N.Nishimura, B.Olaizola, C.Paxman, A.Psaltis, C.E.Svensson, J.Williams, B.Wallis, D.Yates, D.Walter, B.Davids First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam NUCLEAR REACTIONS 1H(83Rb, γ), (84Kr, γ), E=2.4, 2.7 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, partial σ. Comparison with statistical model calculations.
doi: 10.1103/PhysRevLett.127.112701
2021PS01 Nucl.Instrum.Methods Phys.Res. A987, 164828 (2021) A.Psaltis, A.A.Chen, D.S.Connolly, B.Davids, G.Gilardy, R.Giri, U.Greife, W.Huang, D.A.Hutcheon, J.Karpesky, A.Lennarz, J.Liang, M.Lovely, S.N.Paneru, C.Ruiz, G.Tenkila, M.Williams Beyond the acceptance limit of DRAGON: The case of the 6Li(α, γ)10B reaction NUCLEAR REACTIONS 6Li(α, γ), E=3.6 MeV; measured reaction products, TOF, Eγ, Iγ; deduced Q-value, resonance parameters. Comparison with available data.
doi: 10.1016/j.nima.2020.164828
2021RA22 Phys.Rev. C 104, L042801 (2021) J.S.Randhawa, R.Kanungo, J.Refsgaard, P.Mohr, T.Ahn, M.Alcorta, C.Andreoiu, S.S.Bhattacharjee, B.Davids, G.Christian, A.A.Chen, R.Coleman, P.E.Garrett, G.F.Grinyer, E.G.Fuakye, G.Hackman, J.Hollett, R.Jain, K.Kapoor, R.Krucken, A.Laffoley, A.Lennarz, J.Liang, Z.Meisel, B.Nikhil, A.Psaltis, A.Radich, M.Rocchini, N.Saei, M.Saxena, M.Singh, C.Svensson, P.Subramaniam, A.Talebitaher, S.Upadhyayula, C.Waterfield, J.Williams, M.Williams First direct measurement of 59Cu(p, α)56Ni: step towards constraining the Ni-Cu cycle in the cosmos NUCLEAR REACTIONS 1H(59Cu, α)56Ni, E=8.5 MeV/nucleon, [secondary 59Cu beam from Nb(p, X), E=480 MeV at the TRIUMF cyclotron, followed by re-acceleration of 59Cu beam by ISAC-II superconducting LINAC, solid H2 target]; measured protons and α particles, angle-integrated σ using thick single-sided silicon strip detectors and a layer of thick CsI(Tl) detectors; deduced ratio of integrated σ to total σ, exclusive population of the ground state of 56Ni in (p, α). Comparison with Hauser-Feshbach based statistical model calculations; deduced overestimation of (p, α) cross section in this region. Discussed impact on νp process and x-ray bursts (XRBs). Relevance to Ni-Cu cycle in nucleosynthesis, with competing 59Cu(p, α)56Ni and 59Cu(p, γ)60Zn reactions.
doi: 10.1103/PhysRevC.104.L042801
2021WI03 Phys.Rev. C 103, 055805 (2021) M.Williams, P.Adsley, B.Davids, U.Greife, D.Hutcheon, J.Karpesky, A.Lennarz, M.Lovely, C.Ruiz New measurement of the Ec.m. = 323 KeV resonance in the 19F(p, γ)20Ne reaction NUCLEAR REACTIONS 1H(19F, γ)20Ne, E=6.668 MeV from the ISAC-I facility of TRIUMF; measured recoils, Eγ, Iγ, (recoils)γ-coin, MCP RF-TOF using DRAGON separator with BGO array for γ rays and heavy ion detector system of double-sided silicon strip detector (DSSSD) and MCP for recoils. 20Ne; deduced γ-ray branching ratios from the 323-keV proton resonance in 20Ne, resonance strengths, width, thermonuclear reaction rates at T=0.01-10 GK and compared with previous experimental results and with compiled data in NACRE database.
doi: 10.1103/PhysRevC.103.055805
2020FA06 Phys.Lett. B 807, 135575 (2020) J.Fallis, C.Akers, A.M.Laird, A.Simon, A.Spyrou, G.Christian, D.Connolly, U.Hager, D.A.Hutcheon, A.Lennarz, P.O'Malley, S.J.Quinn, J.Riley, A.Rojas, C.Ruiz, M.Williams First measurement in the Gamow window of a reaction for the γ process in inverse kinematics: 76Se(α, γ)80Kr NUCLEAR REACTIONS 4He(76Se, γ)80Kr, E=1.4-1.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ, reaction rates. Comparison with calculations.
doi: 10.1016/j.physletb.2020.135575
2020FR07 Phys.Rev.Lett. 125, 032701 (2020) S.Fretwell, K.G.Leach, C.Bray, G.B.Kim, J.Dilling, A.Lennarz, X.Mougeot, F.Ponce, C.Ruiz, J.Stackhouse, S.Friedrich Direct Measurement of the 7Be L/K Capture Ratio in Ta-Based Superconducting Tunnel Junctions RADIOACTIVITY 7Be(EC); measured decay products, phonons; deduced recoil spectra, L/K ratio.
doi: 10.1103/PhysRevLett.125.032701
2020LE06 J.Phys.(London) G47, 045113 (2020) E.Leistenschneider, R.Klawitter, A.Lennarz, M.Alanssari, J.C.Bale, B.R.Barquest, U.Chowdhury, A.Finlay, A.T.Gallant, B.Kootte, D.Lascar, K.G.Leach, A.J.Mayer, D.Short, C.Andreoiu, G.Gwinner, M.E.Wieser, J.Dilling, A.A.Kwiatkowski Diversifying beam species through decay and recapture ion trapping: a demonstrative experiment at TITAN-EBIT RADIOACTIVITY 30Mg, 30Al(β-) [from U(p, X), E=480 MeV]; measured decay products, Eγ, Iγ; deduced γ-ray energies, population and charge-state evolutions and in-trap decay at TITAN-EBIT, identification of daughter species. TRIUMF's ISOL facility, the isotope separator and accelerator (ISAC). ATOMIC MASSES 30Mg, 30Al; measured ToF-ICR resonance frequencies; deduced atomic mass excesses. Comparison with available data.
doi: 10.1088/1361-6471/ab6ee1
2020LE11 Phys.Lett. B 807, 135539 (2020) A.Lennarz, M.Williams, A.M.Laird, U.Battino, A.A.Chen, D.Connolly, B.Davids, N.Esker, R.Garg, M.Gay, U.Greife, U.Hager, D.Hutcheon, J.Jose, M.Lovely, S.Lyons, A.Psaltis, J.E.Riley, A.Tattersall, C.Ruiz First inverse kinematics measurement of key resonances in the 22Ne(p, γ)23Na reaction at stellar temperatures NUCLEAR REACTIONS 1H(22Ne, γ)23Na, E not given; measured reaction products; deduced resonance strengths, reaction rates.
doi: 10.1016/j.physletb.2020.135539
2020WI08 Phys.Rev. C 102, 035801 (2020) M.Williams, A.Lennarz, A.M.Laird, U.Battino, J.Jose, D.Connolly, C.Ruiz, A.Chen, B.Davids, N.Esker, B.R.Fulton, R.Garg, M.Gay, U.Greife, U.Hager, D.Hutcheon, M.Lovely, S.Lyons, A.Psaltis, J.E.Riley, A.Tattersall First inverse kinematics study of the 22Ne(p, γ)23Na reaction and its role in AGB star and classical nova nucleosynthesis NUCLEAR REACTIONS 1H(22Ne, γ)23Na, E=161-1274 keV/nucleon from ISAC-I-TRIUMF facility, followed by mass separation of 22Ne fragments; measured Eγ, Iγ, heavy-ion evaporation products, (recoils)γ-coin, time-of-flight spectra using DRAGON array and microchannel plate (MCP) detectors. 23Na; deduced levels, proton resonances, resonance strengths, direct capture cross sections and astrophysical S factors, thermonuclear reaction rates from 0.010 to 10.0 GK. Predicted ejecta mass fractions for 20,21,22Ne, 22,23Na, 24,25,26Mg, 26,27Al. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.102.035801
2017BR14 Phys.Rev. C 96, 034316 (2017) M.Brodeur, A.A.Kwiatkowski, O.M.Drozdowski, C.Andreoiu, D.Burdette, A.Chaudhuri, U.Chowdhury, A.T.Gallant, A.Grossheim, G.Gwinner, H.Heggen, J.D.Holt, R.Klawitter, J.Lassen, K.G.Leach, A.Lennarz, C.Nicoloff, S.Raeder, B.E.Schultz, S.R.Stroberg, A.Teigelhofer, R.Thompson, M.Wieser, J.Dilling Precision mass measurements of magnesium isotopes and implications for the validity of the isobaric mass multiplet equation ATOMIC MASSES 27,28,29Mg; measured cyclotron frequencies, mass excesses using TITAN Penning trap at ISAC-TRIUMF facility; deduced S(p). Comparison with AME-2016 evaluated data, and with ab initio calculations from the valence-space in-medium similarity renormalization group. 27,28,29Mg produced in SiC(p, X), E=480 MeV reaction, followed by laser resonance ionization in a radio-frequency ion guide (IG-LIS).29Mg, 29Cl, 30Mg, 30Ar; analyzed isobaric mass multiplet equation (IMME) in the form of a cubic term. 28S, 29Cl; need to confirm mass excess of 28S and S(n) of 29Cl.
doi: 10.1103/PhysRevC.96.034316
2017GA20 Phys.Rev. C 96, 024325 (2017) A.T.Gallant, M.Alanssari, J.C.Bale, C.Andreoiu, B.R.Barquest, U.Chowdhury, J.Even, A.Finlay, D.Frekers, G.Gwinner, R.Klawitter, B.Kootte, A.A.Kwiatkowski, D.Lascar, K.G.Leach, E.Leistenschneider, A.Lennarz, A.J.Mayer, D.Short, R.Thompson, M.Wieser, D.Lunney, J.Dilling Mass determination near N=20 for Al and Na isotopes ATOMIC MASSES 31,32Na, 29,34,35Al; measured cyclotron frequencies and mass excesses by time-of-flight ion-cyclotron-resonance (TOF-ICR) technique using the TITAN Penning trap mass spectrometer at ISAC-TRIUMF; deduced S(2n). Radioactive isotopes produced via the isotope separator on-line (ISOL) technique by a 480-MeV proton beam impinging on a UCx target, followed by the separation of sodium isotopes by surface ionization, and aluminum isotopes by the TRIUMF Resonant Ionization Laser Ion Source (TRILIS). Comparison with previous experimental values and mass evaluations. Systematics of S(2n) values for N=18-25 Na, Mg, and Al isotopic chains.
doi: 10.1103/PhysRevC.96.024325
2017RE10 Phys.Rev. C 96, 052501 (2017) M.P.Reiter, K.G.Leach, O.M.Drozdowski, S.R.Stroberg, J.D.Holt, C.Andreoiu, C.Babcock, B.Barquest, M.Brodeur, A.Finlay, M.Foster, A.T.Gallant, G.Gwinner, R.Klawitter, B.Kootte, A.A.Kwiatkowski, Y.Lan, D.Lascar, E.Leistenschneider, A.Lennarz, S.Paul, R.Steinbrugge, R.I.Thompson, M.Wieser, J.Dilling High-precision QEC-value measurement of the superallowed β+ emitter 22Mg and an ab initio evaluation of the A=22 isobaric triplet ATOMIC MASSES 22Mg; measured time-of-flight quadrupole-excitation and Ramsey-excitation resonance spectra using Ion Trap for Atomic and Nuclear Science (TITAN) at TRIUMF; deduced average frequency ratios for the mass measurements. 22Mg, 22Na; deduced mass excesses and Q value for ϵ decay of 22Mg decay to 22Na. Comparison with AME-2016 and Hardy-Towner evaluations. 22Mg, 22Ne, 22Na; deduced new coefficients of the IMME by using state-of-the-art ab initio shell-model calculations of the IAS energies. Relevance to isospin-symmetry-breaking (ISB) correction in superallowed β decays.
doi: 10.1103/PhysRevC.96.052501
2017WI14 Phys.Rev.Lett. 119, 242701 (2017) R.Wilkinson, G.Lotay, A.Lennarz, C.Ruiz, G.Christian, C.Akers, W.N.Catford, A.A.Chen, D.Connolly, B.Davids, D.A.Hutcheon, D.Jedrejcic, A.M.Laird, L.Martin, E.McNeice, J.Riley, M.Williams Direct Measurement of the Key Ec.m. = 456 keV Resonance in the Astrophysical 19Ne(p, γ)20Na Reaction and Its Relevance for Explosive Binary Systems NUCLEAR REACTIONS H(19Ne, γ), E=9.24 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ. 19Ne, 20Na; deduced resonance parameters, reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.119.242701
2016KL04 Phys.Rev. C 93, 045807 (2016) R.Klawitter, A.Bader, M.Brodeur, U.Chowdhury, A.Chaudhuri, J.Fallis, A.T.Gallant, A.Grossheim, A.A.Kwiatkowski, D.Lascar, K.G.Leach, A.Lennarz, T.D.Macdonald, J.Pearkes, S.Seeraji, M.C.Simon, V.V.Simon, B.E.Schultz, J.Dilling Mass measurements of neutron-rich Rb and Sr isotopes ATOMIC MASSES 98,99,100Rb, 98,99,100,101Sr; measured cyclotron frequency using the time-of-flight ion-cyclotron-resonance technique (TOF-ICR) using TITAN Penning-trap mass spectrometer at ISAC-TRIUMF; deduced mass excesses. Comparison with previous measurements and AME-2012 evaluation. Rb and Sr ions produced in U(p, F), E=480 MeV reaction and separated by a dipole magnet.
doi: 10.1103/PhysRevC.93.045807
2015CH58 Phys.Rev. C 92, 045803 (2015) U.Chowdhury, K.G.Leach, C.Andreoiu, A.Bader, M.Brodeur, A.Chaudhuri, A.T.Gallant, A.Grossheim, G.Gwinner, R.Klawitter, A.A.Kwiatkowski, A.Lennarz, T.D.Macdonald, J.Pearkes, B.E.Schultz, J.Dilling First direct mass measurement of the neutron-deficient nucleus 24Al ATOMIC MASSES 24Al; measured time-of-flight quadrupole excitation resonance spectrum for 24Al ions, mass excess using TITAN Penning-Trap mass spectrometer and Ion-Guide Laser Ion Source (IG-LIS) at TRIUMF; deduced S(p). Comparison with other data and with AME-2012. NUCLEAR REACTIONS 23Mg(p, γ)24Al; measured reaction resonance energy of astrophysical interest. Comparison with data from DRAGON at TRIUMF.
doi: 10.1103/PhysRevC.92.045803
2015FR02 Phys.Rev. C 91, 034608 (2015); Erratum Phys.Rev. C 100, 049901 (2019) D.Frekers, T.Adachi, H.Akimune, M.Alanssari, B.A.Brown, B.T.Cleveland, H.Ejiri, H.Fujita, Y.Fujita, M.Fujiwara, V.N.Gavrin, M.N.Harakeh, K.Hatanaka, M.Holl, C.Iwamoto, A.Lennarz, A.Okamoto, H.Okamura, T.Suzuki, A.Tamii Precision evaluation of the 71Ga (νe, e-) solar neutrino capture rate from the (3He, t) charge-exchange reaction NUCLEAR REACTIONS 71Ga(3He, t)71Ge, E=420 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrometer at RCNP-Osaka facility. 71Ge; deduced levels, J, π, IAS, Gamow-Teller B(GT) transition strengths from analysis based on theoretical form factors and one-body transition densities from the shell-model code NUSHELLX with the GXPF1a interaction in full fp-model space. DWBA analysis of σ(θ) data. 71Ga(ν, e-); deduced solar neutrino capture rates as function of excitation energy in 71Ge from B(GT) values.
doi: 10.1103/PhysRevC.91.034608
2015KW01 Phys.Rev. C 92, 061301 (2015) A.A.Kwiatkowski, C.Andreoiu, J.C.Bale, A.Chaudhuri, U.Chowdhury, S.Malbrunot-Ettenauer, A.T.Gallant, A.Grossheim, G.Gwinner, A.Lennarz, T.D.Macdonald, T.J.M.Rauch, B.E.Schultz, S.Seeraji, M.C.Simon, V.V.Simon, D.Lunney, A.Poves, J.Dilling Observation of a crossover of S2n in the island of inversion from precision mass spectrometry ATOMIC MASSES 27,29,30,31,32,33,34Al; measured TOF-ICR resonance, mass excess using Ion Trap for Atomic and Nuclear science (TITAN) Penning-trap facility at TRIUMF. Comparison with AME-2012, and previous experimental values. Systematics of S(2n) values for 28,29,30,31,32,33,34,35,36,37Mg, 29,30,31,32,33,34,35,36,37,38Al, comparison of experimental and theoretical values; deduced crossover at N=21 in the island of inversion. Large-scale shell-model calculations.
doi: 10.1103/PhysRevC.92.061301
2014GA20 Phys.Rev.Lett. 113, 082501 (2014) A.T.Gallant, M.Brodeur, C.Andreoiu, A.Bader, A.Chaudhuri, U.Chowdhury, A.Grossheim, R.Klawitter, A.A.Kwiatkowski, K.G.Leach, A.Lennarz, T.D.Macdonald, B.E.Schultz, J.Lassen, H.Heggen, S.Raeder, A.Teigelhofer, B.A.Brown, A.Magilligan, J.D.Holt, J.Menendez, J.Simonis, A.Schwenk, J.Dilling Breakdown of the Isobaric Multiplet Mass Equation for the A=20 and 21 Multiplets ATOMIC MASSES 20,21Mg; measured time-of-flight ion cyclotron resonance; deduced masses. Comparison with shell model calculations, AME2012 mass evaluation.
doi: 10.1103/PhysRevLett.113.082501
2014KW01 Hyperfine Interactions 225, 143 (2014) A.A.Kwiatkowski, C.Andreoiu, J.C.Bale, T.Brunner, A.Chaudhuri, U.Chowdhury, P.Delheij, S.Ettenauer, D.Frekers, A.T.Gallant, A.Grossheim, G.Gwinner, F.Jang, A.Lennarz, T.Ma, E.Mane, M.R.Pearson, B.E.Schultz, M.C.Simon, V.V.Simon, J.Dilling TITAN: An ion trap facility for on-line mass measurement experiments
doi: 10.1007/s10751-013-0892-8
2014KW04 Phys.Rev. C 89, 045502 (2014) A.A.Kwiatkowski, T.Brunner, J.D.Holt, A.Chaudhuri, U.Chowdhury, M.Eibach, J.Engel, A.T.Gallant, A.Grossheim, M.Horoi, A.Lennarz, T.D.Macdonald, M.R.Pearson, B.E.Schultz, M.C.Simon, R.A.Senkov, V.V.Simon, K.Zuber, J.Dilling New determination of double-β-decay properties on 48Ca High-precision Qββ-value measurement and improved nuclear matrix element calculations ATOMIC MASSES 48Ca, 48Ti; measured cyclotron-frequencies, resonances using TITAN system consisting of radio frequency quadrupole (RFQ) beam cooler and buncher, an electron beam ion trap (EBIT), and a Penning trap (MPET) at ISAC-TRIUMF facility; deduced Q value for double β decay of 48Ti. Comparison with previous measurements and atomic mass evaluations (AME-2003 and AME-2012). RADIOACTIVITY 48Ca(2β-); measured precise Q-value using TITAN system at ISAC-TRIUMF facility; calculated ββ nuclear matrix element by including effects of levels outside the valence space in a shell-model; discussed case for a new experiment on double-beta decay of 48Ca.
doi: 10.1103/PhysRevC.89.045502
2014LE02 Hyperfine Interactions 225, 157 (2014) A.Lennarz, T.Brunner, C.Andreoiu, A.Chaudhuri, U.Chowdhury, P.Delheij, J.Dilling, S.Ettenauer, D.Frekers, A.T.Gallant, A.Grossheim, F.Jang, A.A.Kwiatkowski, T.Ma, E.Mane, M.R.Pearson, B.E.Schultz, M.C.Simon, V.V.Simon Electron-capture branching ratio measurements of odd-odd intermediate nuclei in double-beta decay at the TITAN facility RADIOACTIVITY 116In(β-), (EC); measured decay products, Eγ, Iγ, X-rays; deduced isomers, energy levels, J, π. Comparison with available data.
doi: 10.1007/s10751-013-0893-7
2014LE20 Phys.Rev.Lett. 113, 082502 (2014) A.Lennarz, A.Grossheim, K.G.Leach, M.Alanssari, T.Brunner, A.Chaudhuri, U.Chowdhury, J.R.C.Lopez-Urrutia, A.T.Gallant, M.Holl, A.A.Kwiatkowski, J.Lassen, T.D.Macdonald, B.E.Schultz, S.Seeraji, M.C.Simon, C.Andreoiu, J.Dilling, D.Frekers In-Trap Spectroscopy of Charge-Bred Radioactive Ions RADIOACTIVITY 124In(β-), 124Cs(EC); measured decay products, Eγ, Iγ, X-rays; deduced isomer yields, T1/2, γ-ray energies, branching ratios. Electron-beam ion trap of the TITAN facility at TRIUMF.
doi: 10.1103/PhysRevLett.113.082502
2014MA21 Phys.Rev. C 89, 044318 (2014) T.D.Macdonald, B.E.Schultz, J.C.Bale, A.Chaudhuri, U.Chowdhury, D.Frekers, A.T.Gallant, A.Grossheim, A.A.Kwiatkowski, A.Lennarz, M.C.Simon, V.V.Simon, J.Dilling Precision Penning-trap measurement to investigate the role of the51Cr (e-, νe) 51V Q value in the gallium anomaly ATOMIC MASSES 51Cr, 51V; measured cyclotron-frequencies, TOF-ICR resonances using TITAN system consisting of radio frequency quadrupole (RFQ) beam cooler and buncher, an electron beam ion trap (EBIT), and a Penning trap (MPET) at ISAC-TRIUMF facility; deduced Q value for EC decay of 51Cr. Comparison with AME-2012 evaluation. Relevance to solar neutrino experiments SAGE and GALLEX. RADIOACTIVITY 51Cr(EC); measured precise Q(EC) value using TITAN system for precise mass measurements at ISAC-TRIUMF facility.
doi: 10.1103/PhysRevC.89.044318
2014SC09 Phys.Rev. C 90, 012501 (2014) B.E.Schultz, M.Brodeur, C.Andreoiu, A.Bader, A.Chaudhuri, U.Chowdhury, A.T.Gallant, A.Grossheim, R.Klawitter, A.A.Kwiatkowski, K.G.Leach, A.Lennarz, T.D.Macdonald, J.Lassen, H.Heggen, S.Raeder, A.Teigelhofer, J.Dilling Precision QEC-value measurement of 23Mg for testing the Cabibbo-Kobayashi-Maskawa matrix unitarity ATOMIC MASSES 23Mg; measured quadrupole and Ramsey resonances, frequency ratios of 23Mg+ to 23Na+ using TITAN Penning-trap mass spectrometer at ISAC-TRIUMF facility; deduced Q value for 23Mg decay. Comparison with AME-2012. RADIOACTIVITY 23Mg(EC)[from Si(p, X), E=480 MeV]; measured precise mass; deduced Q value, statistical rate function, ft value of mirror β transition. Comparison of Q value with AME-2012 evaluation. Test of the Cabibbo-Kobayashi-Maskawa matrix unitarity.
doi: 10.1103/PhysRevC.90.012501
2013BR16 Eur.Phys.J. A 49, 142 (2013) T.Brunner, A.Lapierre, C.Andreoiu, M.Brodeur, P.Delheij, S.Ettenauer, D.Frekers, A.T.Gallant, R.Gernhauser, A.Grossheim, R.Krucken, A.Lennarz, D.Lunney, D.Mucher, R.Ringle, M.C.Simon, V.V.Simon, S.K.L.Sjue, K.Zuber, J.Dilling Trapped-ion decay spectroscopy towards the determination of ground-state components of double-beta decay matrix elements RADIOACTIVITY 124,125,126Cs(EC), (β+), (IT); measured Eγ, Iγ, X-ray. Method test experiment for possible determination of 2β matrix elements.
doi: 10.1140/epja/i2013-13142-4
2013CH49 Phys.Rev. C 88, 054317 (2013) A.Chaudhuri, C.Andreoiu, T.Brunner, U.Chowdhury, S.Ettenauer, A.T.Gallant, G.Gwinner, A.A.Kwiatkowski, A.Lennarz, D.Lunney, T.D.Macdonald, B.E.Schultz, M.C.Simon, V.V.Simon, J.Dilling Evidence for the extinction of the N=20 neutron-shell closure for 32Mg from direct mass measurements ATOMIC MASSES 29,30,31Na, 30,31,32,33,34Mg; measured Time-of-flight (TOF) ion-cyclotron resonances using TITAN Penning trap at ISAC-TRIUMF with respect to 16O and 39K references. Comparison with previous experimental data and with AME evaluations. Systematics of S(2n) values for N=18-24 Na and Mg isotopes; and experimental and theoretical neutron shell gap N=20, Z=10-22 nuclei. Discussed magicity of N=20 shell closure.
doi: 10.1103/PhysRevC.88.054317
2013FR13 Phys.Lett. B 722, 233 (2013) D.Frekers, M.C.Simon, C.Andreoiu, J.C.Bale, M.Brodeur, T.Brunner, A.Chaudhuri, U.Chowdhury, J.R.C.Lopez-Urrutia, P.Delheij, H.Ejiri, S.Ettenauer, A.T.Gallant, V.Gavrin, A.Grossheim, M.N.Harakeh, F.Jang, A.A.Kwiatkowski, J.Lassen, A.Lennarz, M.Luichtl, T.Ma, T.D.Macdonald, E.Mane, D.Robertson, B.E.Schultz, V.V.Simon, A.Teigelhofer, J.Dilling Penning-trap Q-value determination of the 71Ga(ν, e-)71Ge reaction using threshold charge breeding of on-line produced isotopes ATOMIC MASSES 71Ga, 71Ge; measured TOF, TOF-ICR, ion cyclotron resonance spectra; deduced Q-value and its uncertainty. TITAN Penning trap at ISAC/TRIUMF, comparison with AME data.
doi: 10.1016/j.physletb.2013.04.019
2012GA29 Phys.Rev.Lett. 109, 032506 (2012) A.T.Gallant, J.C.Bale, T.Brunner, U.Chowdhury, S.Ettenauer, A.Lennarz, D.Robertson, V.V.Simon, A.Chaudhuri, J.D.Holt, A.A.Kwiatkowski, E.Mane, J.Menendez, B.E.Schultz, M.C.Simon, C.Andreoiu, P.Delheij, M.R.Pearson, H.Savajols, A.Schwenk, J.Dilling New Precision Mass Measurements of Neutron-Rich Calcium and Potassium Isotopes and Three-Nucleon Forces ATOMIC MASSES 51,52Ca, 51K; measured TOF-ICR resonances, average frequency ratios; deduced masses. Comparison with available data. TRIUMF TITAN trap, comparison with available data, KB3G and GXPF1A effective interactions.
doi: 10.1103/PhysRevLett.109.032506
2012PU02 Phys.Rev. C 86, 044603 (2012) P.Puppe, A.Lennarz, T.Adachi, H.Akimune, H.Ejiri, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, E.-W.Grewe, K.Hatanaka, R.Hodak, C.Iwamoto, N.T.Khai, A.Okamoto, H.Okamura, P.P.Povinec, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, M.Yosoi High resolution (3He, t)experiment on the double-β decaying nuclei 128Te and 130Te NUCLEAR REACTIONS 128,130Te(3He, t), E=420 MeV; measured triton spectra, σ(θ) using Grand Raiden magnetic spectrometer at RCNP facility. 128,130I; deduced levels, J, π, IAS, B(GT). DWBA analysis. Discussed impact on ββ decay matrix elements for 128,130Te.
doi: 10.1103/PhysRevC.86.044603
2012TH06 Phys.Rev. C 86, 014304 (2012) J.H.Thies, D.Frekers, T.Adachi, M.Dozono, H.Ejiri, H.Fujita, Y.Fujita, M.Fujiwara, E.-W.Grewe, K.Hatanaka, P.Heinrichs, D.Ishikawa, N.T.Khai, A.Lennarz, H.Matsubara, H.Okamura, Y.Y.Oo, P.Puppe, T.Ruhe, K.Suda, A.Tamii, H.P.Yoshida, R.G.T.Zegers The (3He, t) reaction on 76Ge, and the double-β-decay matrix element NUCLEAR REACTIONS 76Ge(3He, t)76As, E=420 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrometer at RCNP facility. 76As; deduced levels, L-transfers, J, π, IAS, GT resonance (GTR) and the spin-dipole resonance (SDR), B(GT) values. DWBA analysis of Σ(θ) data. Comparison of B(GT)- distributions with B(GT)+ from 76Se(d, 2He)76As reaction. Discussed impact on double-beta decay matrix elements for 76Ge decay. RADIOACTIVITY 76Ge(2β-); analyzed double beta-decay matrix elements.
doi: 10.1103/PhysRevC.86.014304
2012TH08 Phys.Rev. C 86, 044309 (2012) J.H.Thies, T.Adachi, M.Dozono, H.Ejiri, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, E.-W.Grewe, K.Hatanaka, P.Heinrichs, D.Ishikawa, N.T.Khai, A.Lennarz, H.Matsubara, H.Okamura, Y.Y.Oo, P.Puppe, T.Ruhe, K.Suda, A.Tamii, H.P.Yoshida, R.G.T.Zegers High-resolution 100Mo(3He, t)100Tc charge-exchange experiment and the impact on double-β decays and neutrino charged-current reactions NUCLEAR REACTIONS 100Mo(3He, t), E=420 MeV; measured triton spectra, σ(θ) at RCNP facility. 100Tc; deduced levels, IAS, J, π, B(GT). Discussed impact on the matrix elements for 2νββ decay. DWBA analysis.
doi: 10.1103/PhysRevC.86.044309
2012TH12 Phys.Rev. C 86, 054323 (2012) J.H.Thies, P.Puppe, T.Adachi, M.Dozono, H.Ejiri, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, E.-W.Grewe, K.Hatanaka, P.Heinrichs, D.Ishikawa, N.T.Khai, A.Lennarz, H.Matsubara, H.Okamura, Y.Y.Oo, T.Ruhe, K.Suda, A.Tamii, H.P.Yoshida, R.G.T.Zegers High-resolution 96Zr(3He, t) experiment and the matrix element for double-β decay NUCLEAR REACTIONS 90,92,96Zr(3He, t), E=420 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrometer at RCNP facility. 90,92,96Nb; deduced levels, IAS, L-transfers, J, π, B(GT), nuclear matrix element for 2νββ decay of 96Zr. 91,94Zr(3He, t), E=420 MeV; measured triton spectrum; deduced IAS in 91,94Nb. Comparison with shell model calculations, and with previous study of 96Mo(d, 2He)96Nb reaction.
doi: 10.1103/PhysRevC.86.054323
2011FR15 Phys.Lett. B 706, 134 (2011) D.Frekers, H.Ejiri, H.Akimune, T.Adachi, B.Bilgier, B.A.Brown, B.T.Cleveland, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, V.N.Gavrin, E.-W.Grewe, C.J.Guess, M.N.Harakeh, K.Hatanaka, R.Hodak, M.Holl, C.Iwamoto, N.T.Khai, H.C.Kozer, A.Lennarz, A.Okamoto, H.Okamura, P.P.Povinec, P.Puppe, F.Simkovic, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, J.Van de Walle, R.G.T.Zegers The 71Ga(3He, t) reaction and the low-energy neutrino response NUCLEAR REACTIONS 71Ga(3He, t), E=420 MeV; measured reaction products; deduced isobaric-analogue resonance yields, σ(θ), Gamow-Teller strength values. SAGE and GALLEX calibration implications.
doi: 10.1016/j.physletb.2011.10.061
2011PU06 Phys.Rev. C 84, 051305 (2011) P.Puppe, D.Frekers, T.Adachi, H.Akimune, N.Aoi, B.Bilgier, H.Ejiri, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, M.N.Harakeh, K.Hatanaka, M.Holl, H.C.Kozer, J.Lee, A.Lennarz, H.Matsubara, K.Miki, S.E.A.Orrigo, T.Suzuki, A.Tamii, J.H.Thies High-resolution (3He, t) reaction on the double-β decaying nucleus 136Xe NUCLEAR REACTIONS 136Xe(3He, t), E=420 MeV; measured E(t), I(t), σ(θ) using Grand-Raiden spectrometer. 136Cs; deduced levels, J, π, l-values, Gamow-Teller (GT) transition strengths. DWBA analysis. Relevance to double beta decay matrix elements for 136Xe.
doi: 10.1103/PhysRevC.84.051305
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