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NSR database version of May 19, 2024.

Search: Author = C.Babcock

Found 15 matches.

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2020RE04      Phys.Rev. C 101, 025803 (2020)

M.P.Reiter, S.Ayet San Andres, S.Nikas, J.Lippuner, C.Andreoiu, C.Babcock, B.R.Barquest, J.Bollig, T.Brunner, T.Dickel, J.Dilling, I.Dillmann, E.Dunling, G.Gwinner, L.Graham, C.Hornung, R.Klawitter, B.Kootte, A.A.Kwiatkowski, Y.Lan, D.Lascar, K.G.Leach, E.Leistenschneider, G.Martinez-Pinedo, J.E.McKay, S.F.Paul, W.R.Plass, L.Roberts, H.Schatz, C.Scheidenberger, A.Sieverding, R.Steinbrugge, R.Thompson, M.E.Wieser, C.Will, D.Welch

Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations

ATOMIC MASSES 80,81,82,83,84,85Ga; measured time-of-flight spectra and mass excesses using the Ion Guide Laser Ion Source (IG-LIS) and Multiple-Reflection Time-of-Flight Mass-Spectrometer and isobar separator (MR-TOF-MS) at TRIUMF-TITAN facility; deduced solar r-process abundances for A=70-140. Comparison with AME-2016 values. Systematics of experimental and theoretical S(2n) values for Z=30-33, N=46-57 isotopes.

doi: 10.1103/PhysRevC.101.025803
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2019XI07      Phys.Lett. B 797, 134805 (2019)

L.Xie, X.F.Yang, C.Wraith, C.Babcock, J.Bieron, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, L.Filippin, K.T.Flanagan, R.F.Garcia Ruiz, W.Gins, G.Gaigalas, M.Godefroid, C.Gorges, L.K.Grob, H.Heylen, P.Jonsson, S.Kaufmann, M.Kowalska, J.Kramer, S.Malbrunot-Ettenauer, R.Neugart, G.Neyens, W.Nortershauser, T.Otsuka, J.Papuga, R.Sanchez, Y.Tsunoda, D.T.Yordanov

Nuclear charge radii of 62-80Zn and their dependence on cross-shell proton excitations

NUCLEAR MOMENTS 62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80Zn; measured frequencies; deduced isotope shifts, mean square charge radii.

doi: 10.1016/j.physletb.2019.134805
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2018BA08      Phys.Rev. C 97, 024312 (2018)

C.Babcock, R.Klawitter, E.Leistenschneider, D.Lascar, B.R.Barquest, A.Finlay, M.Foster, A.T.Gallant, P.Hunt, B.Kootte, Y.Lan, S.F.Paul, M.L.Phan, M.P.Reiter, B.Schultz, D.Short, C.Andreoiu, M.Brodeur, I.Dillmann, G.Gwinner, A.A.Kwiatkowski, K.G.Leach, J.Dilling

Mass measurements of neutron-rich indium isotopes toward the N=82 shell closure

ATOMIC MASSES 125,125m,126,126m,127,127m,128,128m,129,129m,130,130mIn; measured time-of-flight ion-cyclotron-resonance frequencies using TRIUMF's Ion Traps for Atomic and Nuclear science experiment (TITAN); deduced mass excesses, and energies of the isomeric states. Comparison with AME-2016 and ENSDF evaluated data. systematics of S(2n) values for N=74-82 Sb, Sn In and Cd nuclei, and those of pairing gaps for N=70-82 Sn and In nuclei.

NUCLEAR REACTIONS U(p, X)125In/125mIn/126In/126mIn/127In/127mIn/128In/128mIn/129In/129mIn/130In/130mIn, E=480 MeV; measured reaction products and time-of-flight spectra for ions at TRIUMF-ISAC facility using Ion Guide Laser Ion ISAC magnetic mass separator, radio frequency quadrupole cooler and buncher (RFQ), a helium-filled Paul trap, and electron beam ion trap (EBIT).

doi: 10.1103/PhysRevC.97.024312
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2018LE03      Phys.Rev.Lett. 120, 062503 (2018)

E.Leistenschneider, M.P.Reiter, S.Ayet San Andres, B.Kootte, J.D.Holt, P.Navratil, C.Babcock, C.Barbieri, B.R.Barquest, J.Bergmann, J.Bollig, T.Brunner, E.Dunling, A.Finlay, H.Geissel, L.Graham, F.Greiner, H.Hergert, C.Hornung, C.Jesch, R.Klawitter, Y.Lan, D.Lascar, K.G.Leach, W.Lippert, J.E.McKay, S.F.Paul, A.Schwenk, D.Short, J.Simonis, V.Soma, R.Steinbrugge, S.R.Stroberg, R.Thompson, M.E.Wieser, C.Will, M.Yavor, C.Andreoiu, T.Dickel, I.Dillmann, G.Gwinner, W.R.Plass, C.Scheidenberger, A.A.Kwiatkowski, J.Dilling

Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes

ATOMIC MASSES 51V, 51,52,53,54,55Ti, 52,53,54,55Cr; measured radio frequencies, TOF; deduced mass excesses. Comparison with the AME16 recommended values.

doi: 10.1103/PhysRevLett.120.062503
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2018RE11      Phys.Rev. C 98, 024310 (2018)

M.P.Reiter, S.Ayet San Andres, E.Dunling, B.Kootte, E.Leistenschneider, C.Andreoiu, C.Babcock, B.R.Barquest, J.Bollig, T.Brunner, I.Dillmann, A.Finlay, G.Gwinner, L.Graham, J.D.Holt, C.Hornung, C.Jesch, R.Klawitter, Y.Lan, D.Lascar, J.E.McKay, S.F.Paul, R.Steinbrugge, R.Thompson, J.L.Tracy, M.E.Wieser, C.Will, T.Dickel, W.R.Plass, C.Scheidenberger, A.A.Kwiatkowski, J.Dilling

Quenching of the N=32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

ATOMIC MASSES 52,53,54Cr, 51,52,53Ti, 51,52,53,54,55V; measured multiple-reflection time-of-flight mass-Spectrometer and isobar separator (MR-TOF-MS) spectra, time-of-flight ion-cyclotron-resonance (ToF-ICR) resonances, and mass excesses using TRIUMF Ion Trap for Atomic and Nuclear science (TITAN) penning trap; deduced shell gaps for N=26-35 vanadium and calcium isotopes. Comparison with values in AME-2016. Systematics of S(2n) and half-lives for Z=19-24, N=28-36 nuclides. Discussed the evolution of the N=32 neutron shell closure.

doi: 10.1103/PhysRevC.98.024310
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2018YA11      Phys.Rev. C 97, 044324 (2018)

X.F.Yang, Y.Tsunoda, C.Babcock, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, K.T.Flanagan, R.F.Garcia Ruiz, W.Gins, C.Gorges, L.K.Grob, H.Heylen, S.Kaufmann, M.Kowalska, J.Kramer, S.Malbrunot-Ettenauer, R.Neugart, G.Neyens, W.Nortershauser, T.Otsuka, J.Papuga, R.Sanchez, C.Wraith, L.Xie, D.T.Yordanov

Investigating the large deformation of the 5/2+ isomeric state in 73Zn: An indicator for triaxiality

NUCLEAR MOMENTS 73,73mZn; measured hyperfine structure spectra using collinear laser spectroscopy (COLLAPS) at CERN-ISOLDE; deduced spins of ground state and isomer, estimated half-life of the isomer, and found no evidence for a previously proposed 5.6-s isomer. 73,73mZn produced by impinging UCx target by 1.4 GeV protons, and ionized by the resonant ionization laser-ion source (RILIS). 69m,71m,73m,75,77,79Zn; calculated quadrupole moments of ground states and isomers using shell model with JUN45 and A3DA-m interactions, and compared with experimental results from experiments at ISOLDE-CERN. Discussed collectivity in 73Zn.

NUCLEAR STRUCTURE 71,72,73,74,75Zn; calculated potential energy surfaces (PES) of high-spin states in 71,73,75Zn, and 0+, 2+, and 4+ states in 72,74Zn in (Q2, Q4) plane using Monte Carlo shell model (MCSM). 73Zn; calculated levels, J, π, T plots of levels in 73Zn, and compared with experimental data.

doi: 10.1103/PhysRevC.97.044324
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017LA16      Phys.Rev. C 96, 044323 (2017)

D.Lascar, R.Klawitter, C.Babcock, E.Leistenschneider, S.R.Stroberg, B.R.Barquest, A.Finlay, M.Foster, A.T.Gallant, P.Hunt, J.Kelly, B.Kootte, Y.Lan, S.F.Paul, M.L.Phan, M.P.Reiter, B.Schultz, D.Short, J.Simonis, C.Andreoiu, M.Brodeur, I.Dillmann, G.Gwinner, J.D.Holt, A.A.Kwiatkowski, K.G.Leach, J.Dilling

Precision mass measurements of 125-127Cd isotopes and isomers approaching the N=82 closed shell

ATOMIC MASSES 125,125m,126,127,127mCd, 133Cs; measured TOF ion cyclotron resonances, cyclotron frequencies using TITAN-ISOLTRAP-TRIUMF facility; deduced mass excesses. Comparison with AME-2012 evaluated data, and ab initio shell-model calculations using NUSHELLX code, and with IMSRG calculations. The Cd isotopes produced in U(p, F), E=500 MeV protons using uranium carbide target and Ion Guide Laser Ion Source (IG-LIS) at ISAC-TRIUMF facility.

doi: 10.1103/PhysRevC.96.044323
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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
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2017WR01      Phys.Lett. B 771, 385 (2017)

C.Wraith, X.F.Yang, L.Xie, C.Babcock, J.Bieron, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, L.Filippin, R.F.Garcia Ruiz, W.Gins, L.K.Grob, G.Gaigalas, M.Godefroid, C.Gorges, H.Heylen, M.Honma, P.Jonsson, S.Kaufmann, M.Kowalska, J.Kramer, S.Malbrunot-Ettenauer, R.Neugart, G.Neyens, W.Nortershauser, F.Nowacki, T.Otsuka, J.Papuga, R.Sanchez, Y.Tsunoda, D.T.Yordanov

Evolution of nuclear structure in neutron-rich odd-Zn isotopes and isomers

NUCLEAR MOMENTS 63,65,67,69,71,73,75,77,79Zn; measured optical spectra; deduced hyperfine spectra (hfs) including isomeric structures, J of ground and isomeric states, hfs constants, nuclear magnetic dipole and quadrupole moments, g-factors and wave functions. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2017.05.085
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2016BA44      Phys.Lett. B 760, 387 (2016)

C.Babcock, H.Heylen, M.L.Bissell, K.Blaum, P.Campbell, B.Cheal, D.Fedorov, R.F.Garcia Ruiz, W.Geithner, W.Gins, T.Day Goodacre, L.K.Grob, M.Kowalska, S.M.Lenzi, B.Maass, S.Malbrunot-Ettenauer, B.Marsh, R.Neugart, G.Neyens, W.Nortershauser, T.Otsuka, R.Rossel, S.Rothe, R.Sanchez, Y.Tsunoda, C.Wraith, L.Xie, X.F.Yang

Quadrupole moments of odd-A 53-63Mn: Onset of collectivity towards N = 40

NUCLEAR MOMENTS 53,55,57,59,61,63Mn; measured hyperfine spectra; deduced spectroscopic quadrupole moments. Comparison with large-scale shell model predictions using three effective interactions, GXPF1A, LNPS, modified A3DA.

doi: 10.1016/j.physletb.2016.07.016
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2016HE14      Phys.Rev. C 94, 054321 (2016)

H.Heylen, C.Babcock, R.Beerwerth, J.Billowes, M.L.Bissell, K.Blaum, J.Bonnard, P.Campbell, B.Cheal, T.Day Goodacre, D.Fedorov, S.Fritzsche, R.F.Garcia Ruiz, W.Geithner, Ch.Geppert, W.Gins, L.K.Grob, M.Kowalska, K.Kreim, S.M.Lenzi, I.D.Moore, B.Maass, S.Malbrunot-Ettenauer, B.Marsh, R.Neugart, G.Neyens, W.Nortershauser, T.Otsuka, J.Papuga, R.Rossel, S.Rothe, R.Sanchez, Y.Tsunoda, C.Wraith, L.Xie, X.F.Yang, D.T.Yordanov

Changes in nuclear structure along the Mn isotopic chain studied via charge radii

ATOMIC PHYSICS 51,53,54,55,56,57,58,59,60,61,62,63,64Mn; measured hyperfine spectra using collinear laser spectroscopy at ISOLDE-CERN; deduced charge radii. Isotopes produced in bombardment of uranium carbide target with 1.4-GeV proton beam. Mass and field shift factors calculated in multiconfiguration Dirac-Fock framework and combined with King plot analysis. Comparison with Duflo-Zuker formula.

NUCLEAR STRUCTURE 53,55,57,59,61,63,65Mn; calculated potential energy surfaces using Monte Carlo shell-model. Systematics of S(2n) values for Z=20-28, N=24-46 nuclei.

doi: 10.1103/PhysRevC.94.054321
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2016YA02      Phys.Rev.Lett. 116, 182502 (2016)

X.F.Yang, C.Wraith, L.Xie, C.Babcock, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, K.T.Flanagan, R.F.Garcia Ruiz, W.Gins, C.Gorges, L.K.Grob, H.Heylen, S.Kaufmann, M.Kowalska, J.Kraemer, S.Malbrunot-Ettenauer, R.Neugart, G.Neyens, W.Nortershauser, J.Papuga, R.Sanchez, D.T.Yordanov

Isomer Shift and Magnetic Moment of the Long-Lived 1/2+ Isomer in 7930Zn49: Signature of Shape Coexistence near 78Ni

NUCLEAR MOMENTS 67,79Zn [from U(p, X), E=1.4 GeV]; measured hyperfine spectra of the ground and isomeric states; deduced nuclear moments, g factors, root-mean-square charge radii. Comparison with available data.

doi: 10.1103/PhysRevLett.116.182502
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2015BA49      Phys.Lett. B 750, 176 (2015)

C.Babcock, H.Heylen, J.Billowes, M.L.Bissell, K.Blaum, P.Campbell, B.Cheal, R.F.Garcia Ruiz, C.Geppert, W.Gins, M.Kowalska, K.Kreim, S.M.Lenzi, I.D.Moore, R.Neugart, G.Neyens, W.Nortershauser, J.Papuga, D.T.Yordanov

Evidence for Increased neutron and proton excitations between 51-63Mn

NUCLEAR MOMENTS 51,52,53,54,55,56,57,58,59,60,61,62,63Mn; measured hyperfine structures; deduced J, magnetic dipole moments. Comparison with large-scale shell-model calculations using different model spaces and effective interactions.

doi: 10.1016/j.physletb.2015.09.012
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2015HE10      Acta Phys.Pol. B46, 699 (2015)

H.Heylen, C.Babcock, J.Billowes, M.L.Bissell, K.Blaum, P.Campbell, B.Cheal, R.F.Garcia Ruiz, Ch.Geppert, W.Gins, K.Kreim, I.D.Moore, R.Neugart, G.Neyens, W.Nortershauser, J.Papuga, D.T.Yordanov

Collinear Laser Spectroscopy on Neutron-rich Mn Isotopes Approaching N = 40

NUCLEAR REACTIONS U(p, X)51Mn/53Mn/54Mn/55Mn/56Mn/57Mn/58Mn/59Mn/60Mn/61Mn/62Mn/63Mn/64Mn, E=1.4 GeV; measured hyperfine spectra; deduced J, g-factors, quadrupole moments.

doi: 10.5506/APhysPolB.46.699
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2015HE28      Phys.Rev. C 92, 044311 (2015)

H.Heylen, C.Babcock, J.Billowes, M.L.Bissell, K.Blaum, P.Campbell, B.Cheal, R.F.Garcia Ruiz, Ch.Geppert, W.Gins, M.Kowalska, K.Kreim, S.M.Lenzi, I.D.Moore, R.Neugart, G.Neyens, W.Nortershauser, J.Papuga, D.T.Yordanov

Spins and magnetic moments of 58, 60, 62, 64Mn ground states and isomers

NUCLEAR MOMENTS 54,56,58,60,62,64Mn; measured hyperfine spectra using laser ion source (RILIS), high-resolution separator (HRS), cooler-buncher (ISCOOL), and collinear laser spectroscopy beam line (COLLAPS) at ISOLDE-CERN; deduced levels, J, hyperfine structure parameters, magnetic dipole, moments and electric quadrupole moments for ground states and isomers. Mn beams produced in U(p, X), E=1.4 GeV reaction. Comparison with large-scale shell-model calculations using GXPF1A and LNPS effective interactions.

doi: 10.1103/PhysRevC.92.044311
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