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NSR database version of April 11, 2024.

Search: Author = M.R.Pearson

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2020NI05      Phys.Rev. C 102, 054327 (2020)

H.Nishibata, K.Tajiri, T.Shimoda, A.Odahara, S.Morimoto, S.Kanaya, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of the neutron-rich nucleus 30Mg

RADIOACTIVITY 30Na(β-), (β-n), (β-2n)[nuclear-spin-polarized radioactive beam of 28-keV 30Na from U(p, X), E=500 MeV at TRIUMF cyclotron]; measured Eγ, Iγ, γγ and βγ-coin, γγ(θ), β(θ) from spin-polarized 30Na source, isomer half-life by centroid shift of βγ(t) spectrum using eight sets of detector telescopes consisting of a coaxial high-purity Ge detector (HPGe) and thin plastic scintillator at ISAC-TRIUMF facility. 30Mg; deduced levels, J, π, bands, M1 scissors mode, multipolarities, asymmetry parameters for β transitions, β feedings, logft. 30Na; deduce J, π of the ground state, %β-n or Pn and %β-2n or P2n. Comparison with CHFB + LQRPA, AMD + GCM, and large-scale shell model with the EEdf1 interaction, and with previous experimental data.

COMPILATION 30Mg; compiled levels, J, π from literature, and evaluation in the ENSDF database.

doi: 10.1103/PhysRevC.102.054327
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2019NI04      Phys.Rev. C 99, 024322 (2019)

H.Nishibata, S.Kanaya, T.Shimoda, A.Odahara, S.Morimoto, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of 31Mg: Shape coexistence revealed by β-ψ spectroscopy with spin-polarized 31Na

RADIOACTIVITY 31Na(β-), (β-n)[from 238U(p, X), E=500 MeV, followed by high-resolution mass separation and spin-polarization of 31Na beam at ISAC-I-TRIUMF facility]; measured β spectra, polarization asymmetry of β particles emitted by the decay of 31Na, Eβ, Iβ, Eγ, Iγ, βγ(θ), γ(polarization), βγ- and γγ-coin, half-life of the 50-keV level in 31Mg by βγ(t) using thin plastic scintillators for β- detection and Ge detectors for γ detection at TRIUMF. 31Mg; deduced levels, J, π, %β-n and %β-2n, deformed rotational bands with Kπ=1/2+ and 1/2-. 31Mg(β-)[from 31Na β- decay]; observed γ rays. Comparison with previous experimental data, and with theoretical calculations. Systematics of energies of the lowest 1/2+, 3/2+, 3/2-, and 7/2- levels in 31Mg, 33Si, 35S, 37Ar, 39Ca.

NUCLEAR STRUCTURE 31Mg; calculated levels, J, π using antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM), and shell model with the EEdf1 interaction, microscopically derived from chiral effective field theory. Comparison with experimental data.

COMPILATION 31Mg; compiled and discussed experimental and evaluated data for levels, J, π from 1984 to 2013.

doi: 10.1103/PhysRevC.99.024322
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2019RE07      Phys.Rev. C 99, 065502 (2019)

B.M.Rebeiro, S.Triambak, P.Z.Mabika, P.Finlay, C.S.Sumithrarachchi, G.Hackman, G.C.Ball, P.E.Garrett, C.E.Svensson, D.S.Cross, R.Dunlop, A.B.Garnsworthy, R.Kshetri, J.N.Orce, M.R.Pearson, E.R.Tardiff, H.Al Falou, R.A.E.Austin, R.Churchman, M.K.Djongolov, R.D'Entremont, C.Kierans, L.Milovanovic, S.O'Hagan, S.Reeve, S.K.L.Sjue, S.J.Williams, S.S.Ntshangase

Precise branching ratio measurements in 19Ne β decay and fundamental tests of the weak interaction

RADIOACTIVITY 19Ne(β+)[from C, Si(p, X), E=500 MeV at TRIUMF facility]; measured Eγ, Iγ, electron spectra, βγ-coin using the 8π γ-ray spectrometer and SCEPTAR detector array at TRIUMF-ISAC facility. 19F; deduced levels, β+-branching ratios, precise β branch for superallowed ground-state to ground-state branch, Ft values, Vud element of the CKM quark-mixing matrix. Comparison with previous experimental results. Discussed implications for testing weak interaction symmetries.

doi: 10.1103/PhysRevC.99.065502
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2017MI19      Phys.Rev. C 96, 054314 (2017)

A.J.Miller, K.Minamisono, D.M.Rossi, R.Beerwerth, B.A.Brown, S.Fritzsche, D.Garand, A.Klose, Y.Liu, B.Maass, P.F.Mantica, P.Muller, W.Nortershauser, M.R.Pearson, C.Sumithrarachchi

First determination of ground state electromagnetic moments of 53Fe

NUCLEAR MOMENTS 53Fe; measured hyperfine spectrum using bunched-beam collinear laser spectroscopy at the BECOLA facility at NSCL-MSU; deduced magnetic dipole moment, and electric quadrupole moment. Radioactive ion beam of 53Fe produced in 9Be(58Ni, X), E=160 MeV/nucleon, followed by fragment separation using A1900 separator. 53Co; deduced magnetic dipole moment from mirror magnetic moment systematics. Calculated electric field gradient using multiconfiguration Dirac-Fock (MCDF) method to deduce quadrupole moment. Comparison with shell-model calculations using the GXPF1A effective interaction in a full fp shell model space.

doi: 10.1103/PhysRevC.96.054314
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2017NI02      Phys.Lett. B 767, 81 (2017)

H.Nishibata, T.Shimoda, A.Odahara, S.Morimoto, S.Kanaya, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura

Shape coexistence in the N = 19 neutron-rich nucleus 31Mg explored by β-γ spectroscopy of spin-polarized 31Na

RADIOACTIVITY 31Na(β-) [from U(p, X)31Na, E=500 MeV]; measured decay products, Eγ, Iγ; deduced level energies, J, π, branching ratios, rotational bands. Comparison with antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM) calculations.

doi: 10.1016/j.physletb.2017.01.049
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2016CA02      Prog.Part.Nucl.Phys. 86, 127 (2016)

P.Campbell, I.D.Moore, M.R.Pearson

Laser spectroscopy for nuclear structure physics

doi: 10.1016/j.ppnp.2015.09.003
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2016MI27      Phys.Rev.Lett. 117, 252501 (2016)

K.Minamisono, D.M.Rossi, R.Beerwerth, S.Fritzsche, D.Garand, A.Klose, Y.Liu, B.Maass, P.F.Mantica, A.J.Miller, P.Muller, W.Nazarewicz, W.Nortershauser, E.Olsen, M.R.Pearson, P.-G.Reinhard, E.E.Saperstein, C.Sumithrarachchi, S.V.Tolokonnikov

Charge Radii of Neutron Deficient 52, 53Fe Produced by Projectile Fragmentation

NUCLEAR MOMENTS 52,53,56Fe; measured hyperfine spectra; deduced differential mean-square charge radii. Bunched-beam collinear laser spectroscopy, comparison with the nuclear density functional theory with Fayans and Skyrme energy density functionals calculations.

doi: 10.1103/PhysRevLett.117.252501
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2015MA30      Phys.Rev. C 91, 045504 (2015)

S.Malbrunot-Ettenauer, T.Brunner, U.Chowdhury, A.T.Gallant, V.V.Simon, M.Brodeur, A.Chaudhuri, E.Mane, M.C.Simon, C.Andreoiu, G.Audi, J.R.C.Lopez-Urrutia, P.Delheij, G.Gwinner, A.Lapierre, D.Lunney, M.R.Pearson, R.Ringle, J.Ullrich, J.Dilling

Penning trap mass measurements utilizing highly charged ions as a path to benchmark isospin-symmetry breaking corrections in 74Rb

ATOMIC MASSES 74Ga, 74,75,76,85,87Rb; measured cyclotron frequency ratios of Rb isotopes in q=8-12 charge states relative to that of 85Rb using TITAN at TRIUMF-ISAC facility; deduced mass excesses and compared to previous experimental data.

RADIOACTIVITY 74Rb(EC); deduced Q value and logft using mass excess from current and previous studies. Systematics of superallowed β decays of 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb. Discussed test of the isospin-symmetry correction term δC.

NUCLEAR REACTIONS Nb(p, X)74Rb/75Rb/76Rb/78Rb/74Ga, E=500 MeV; measured yields, TOF ion-cyclotron resonances for highly-charged Rb isotopes, TOF of ions with reference to highly-charged 85Rb isotope using TITAN at TRIUMF-ISAC facility.

doi: 10.1103/PhysRevC.91.045504
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2015PR03      Eur.Phys.J. A 51, 23 (2015)

T.J.Procter, J.A.Behr, J.Billowes, F.Buchinger, B.Cheal, J.E.Crawford, J.Dilling, A.B.Garnsworthy, A.Leary, C.D.P.Levy, E.Mane, M.R.Pearson, O.Shelbaya, M.Stolz, W.Al Tamimi, A.Voss

Direct observation of an isomeric state in 98Rb and nuclear properties of exotic rubidium isotopes measured by laser spectroscopy

NUCLEAR REACTIONS U(p, x)Rb, E=500 MeV; measured Rb isotopes using TITAN mass trap or optical spectrum using laser spectroscopy. 98Rb deduced isomeric state, hyperfine coefficients, isotope shifts. 75,76,78Rb deduced magnetic dipole moment, electric quadrupole moment, deformation, charge radii, isotopic shifts, g-factors.

ATOMIC PHYSICS U(p, x)Rb, E=500 MeV; measured E(optical γ); deduced isotopic shifts, charge radii. Compared with published muonic and optical data.

doi: 10.1140/epja/i2015-15023-2
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2015VO05      Phys.Rev. C 91, 044307 (2015)

A.Voss, F.Buchinger, B.Cheal, J.E.Crawford, J.Dilling, M.Kortelainen, A.A.Kwiatkowski, A.Leary, C.D.P.Levy, F.Mooshammer, M.L.Ojeda, M.R.Pearson, T.J.Procter, W.Al Tamimi

Nuclear moments and charge radii of neutron-deficient francium isotopes and isomers

NUCLEAR MOMENTS 204,204m,205,206,206m,208Fr; measured optical fluorescence and hyperfine structure spectra using Collinear laser fluorescence spectroscopy technique at TRIUMF-ISAC facility; deduced spins, isotope shifts, hyperfine coupling constants, magnetic moments, charge radii, spectroscopic electric quadrupole moments, two isomeric states in 206Fr. Comparison with previous experimental results, and with theoretical calculations within the energy density functional (EDF) framework using Skyrme parametrization UNEDF0 and HFBTHO computer code for A=204-213 Fr isotopes. Activities of Fr produced in U(p, X), E=500 MeV reaction.

doi: 10.1103/PhysRevC.91.044307
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2015ZH20      Phys.Rev.Lett. 115, 042501 (2015)

J.Zhang, M.Tandecki, R.Collister, S.Aubin, J.A.Behr, E.Gomez, G.Gwinner, L.A.Orozco, M.R.Pearson, G.D.Sprouse for the FrPNC collaboration

Hyperfine Anomalies in Fr: Boundaries of the Spherical Single Particle Model

NUCLEAR MOMENTS 206,207,209,213,221Fr; measured fluorescence light, sideband frequency; deduced hyperfine splitting of the 7P1/2 state. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.115.042501
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2014BE02      Hyperfine Interactions 225, 115 (2014)

J.A.Behr, A.Gorelov, K.P.Jackson, M.R.Pearson, M.Anholm, T.Kong, R.S.Behling, B.Fenker, D.Melconian, D.Ashery, G.Gwinner

TRINAT: measuring β-decay correlations with laser-trapped atoms

doi: 10.1007/s10751-013-0887-5
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2014CO18      Phys.Rev. A 90, 052502 (2014), Erratum Phys.Rev. A 92, 019902 (2015)

R.Collister, G.Gwinner, M.Tandecki, J.A.Behr, M.R.Pearson, J.Zhang, L.A.Orozco, S.Aubin, E.Gomez, for the FrPNC Collaboration

Isotope shifts in francium isotopes 206-213Fr and 221Fr

ATOMIC PHYSICS 206,207,208,209,210,211,212,213,221Fr; measured radio-frequency sidebands; deduced isotope shifts. Comparison with available data, theoretical calculations.

doi: 10.1103/PhysRevA.90.052502
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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
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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
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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
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2014VO01      J.Phys.(London) G41, 015104 (2014)

A.Voss, M.R.Pearson, F.Buchinger, J.E.Crawford, R.F.Kiefl, C.D.P.Levy, W.A.MacFarlane, E.Mane, G.D.Morris, O.T.J.Shelbaya, Q.Song, D.Wang

High precision measurement of the 11Li and 9Li quadrupole moment ratio using zero-field β-NQR

NUCLEAR MOMENTS 9,11Li; measured RF frequency; deduced electric quadrupole moments ratio. Nuclear quadrupole resonance technique, TRIUMF-ISAC.

doi: 10.1088/0954-3899/41/1/015104
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2013VO10      Phys.Rev.Lett. 111, 122501 (2013)

A.Voss, M.R.Pearson, J.Billowes, F.Buchinger, B.Cheal, J.E.Crawford, A.A.Kwiatkowski, C.D.P.Levy, O.Shelbaya

First Use of High-Frequency Intensity Modulation of Narrow-Linewidth Laser Light and Its Application in Determination of 206, 205, 204Fr Ground-State Properties

NUCLEAR MOMENTS 204,205,206Fr; measured hyperfine structure; deduced nuclear ground-state J, mean-square charge radii, nuclear magnetic moments. Comparison with available data, AME2012.

doi: 10.1103/PhysRevLett.111.122501
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2012GA15      Phys.Rev. C 85, 044311 (2012)

A.T.Gallant, M.Brodeur, T.Brunner, U.Chowdhury, S.Ettenauer, V.V.Simon, E.Mane, M.C.Simon, C.Andreoiu, P.Delheij, G.Gwinner, M.R.Pearson, R.Ringle, J.Dilling

Highly charged ions in Penning traps: A new tool for resolving low-lying isomeric states

ATOMIC MASSES 78,78mRb; measured time-of-flight spectra, frequency ratios relative to 85Rb using TRIUMF-TITAN facility; deduced mass excess of ground state and isomer in 78Rb. Comparison with AME-2003 and ENSDF.

doi: 10.1103/PhysRevC.85.044311
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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
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2012GO29      J.Phys.:Conf.Ser. 387, 012004 (2012)

E.Gomez, S.Aubin, R.Collister, J.A.Behr, G.Gwinner, L.A.Orozco, M.R.Pearson, M.Tandecki, D.Sheng, J.Zhang

The FrPNC Experiment, weak interaction studies in Francium at TRIUMF

doi: 10.1088/1742-6596/387/1/012004
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2012SI10      Phys.Rev. C 85, 064308 (2012)

V.V.Simon, T.Brunner, U.Chowdhury, B.Eberhardt, S.Ettenauer, A.T.Gallant, E.Mane, M.C.Simon, P.Delheij, M.R.Pearson, G.Audi, G.Gwinner, D.Lunney, H.Schatz, J.Dilling

Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A ≈ 100

ATOMIC MASSES 94,97,98Rb, 94,97,98,99Sr; measured time-of-flight and cyclotron frequencies using (TOF-ICR) method with the Penning-trap mass spectrometer TITAN at TRIUMF-ISAC facility; deduced mass excesses. Frequencies ratios measured with reference to 85Rb. Z=36-44, N=55-65; systematics of S(2n) values. Calculated r process abundances as a function of mass number. Discussed astrophysical implications. Comparisons with previous measurements and AME-2003 evaluation.

doi: 10.1103/PhysRevC.85.064308
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2012TR06      Phys.Rev.Lett. 109, 042301 (2012)

S.Triambak, P.Finlay, C.S.Sumithrarachchi, G.Hackman, G.C.Ball, P.E.Garrett, C.E.Svensson, D.S.Cross, A.B.Garnsworthy, R.Kshetri, J.N.Orce, M.R.Pearson, E.R.Tardiff, H.Al Falou, R.A.E.Austin, R.Churchman, M.K.Djongolov, R.D'Entremont, C.Kierans, L.Milovanovic, S.O'Hagan, S.Reeve, S.K.L.Sjue, S.J.Williams

High-Precision Measurement of the 19Ne Half-Life and Implications for Right-Handed Weak Currents

RADIOACTIVITY 19Ne(EC); measured reaction products, Eγ, Iγ; deduced T1/2, right-hand interaction. Comparison with available data.

doi: 10.1103/PhysRevLett.109.042301
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2011ET01      Phys.Rev.Lett. 107, 272501 (2011)

S.Ettenauer, M.C.Simon, A.T.Gallant, T.Brunner, U.Chowdhury, V.V.Simon, M.Brodeur, A.Chaudhuri, E.Mane, C.Andreoiu, G.Audi, J.R.C.Lopez-Urrutia, P.Delheij, G.Gwinner, A.Lapierre, D.Lunney, M.R.Pearson, R.Ringle, J.Ullrich, J.Dilling

First Use of High Charge States for Mass Measurements of Short-Lived Nuclides in a Penning Trap

ATOMIC MASSES 74,75,76Rb, 74Ga; measured TOF ion-cyclotron resonances; deduced masses. Penning trap measurements, comparison with mass evaluation.

doi: 10.1103/PhysRevLett.107.272501
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2011MA66      Phys.Rev.Lett. 107, 212502 (2011)

E.Mane, A.Voss, J.A.Behr, J.Billowes, T.Brunner, F.Buchinger, J.E.Crawford, J.Dilling, S.Ettenauer, C.D.P.Levy, O.Shelbaya, M.R.Pearson

First Experimental Determination of the Charge Radius of 74Rb and Its Application in Tests of the Unitarity of the Cabibbo-Kobayashi-Maskawa Matrix

NUCLEAR MOMENTS 74,75,76,78Rb; measured hyperfine coupling constants; deduced nuclear spins, log ft uncertainty.

doi: 10.1103/PhysRevLett.107.212502
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2011VO08      J.Phys.(London) G38, 075102 (2011)

A.Voss, M.R.Pearson, J.Billowes, F.Buchinger, K.H.Chow, J.E.Crawford, M.D.Hossein, R.F.Kiefl, C.D.P.Levy, W.A.MacFarlane, E.Mane, G.D.Morris, T.J.Parolin, H.Saadaoui, Z.Salman, M.Smadella, Q.Song, D.Wang

Nuclear electric quadrupole moment of 9Li using zero-field β-detected NQR

NUCLEAR MOMENTS 8,9Li; measured β-NQR spectra; deduced electric quadrupole moments.

doi: 10.1088/0954-3899/38/7/075102
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2011VO17      J.Phys.:Conf.Ser. 312, 092063 (2011)

A.Voss, M.R.Pearson, J.Billowes, F.Buchinger, K.H.Chow, J.E.Crawford, M.D.Hossein, R.F.Kiefl, C.D.P.Levy, W.A.MacFarlane, E.Mane, G.D.Morris, T.J.Parolin, H.Saadaoui, Z.Salman, M.Smadella, Q.Song, D.Wang

The development of pure β-NQR techniques for measurements of nuclear ground state quadrupole moments in lithium isotopes

NUCLEAR MOMENTS 8,9,11Li; measured polarized ion beams implanted into crystal with E=28 keV, resonance frequency; deduced (ratio of) quadrupole moments using zero-field β-NQR (β-detected nuclear quadrupole resonance).

doi: 10.1088/1742-6596/312/9/092063
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2010ET01      Phys.Rev. C 81, 024314 (2010)

S.Ettenauer, M.Brodeur, T.Brunner, A.T.Gallant, A.Lapierre, R.Ringle, M.R.Pearson, P.Delheij, J.Lassen, D.Lunney, J.Dilling

Precision ground state mass of 12Be and an isobaric multiplet mass equation (IMME) extrapolation for 2+ and 02++ states in the T=2, A=12 multiplet

ATOMIC MASSES 12Be; measured mass excess using Penning trap mass spectrometer TITAN at TRIUMF. Comparison with previous measurements and evaluations. Analyzed IMME for the lowest lying isospin T=2 multiplet in the A=12 system.

doi: 10.1103/PhysRevC.81.024314
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2009PI01      Phys.Rev. C 79, 015501 (2009)

J.R.A.Pitcairn, D.Roberge, A.Gorelov, D.Ashery, O.Aviv, J.A.Behr, P.G.Bricault, M.Dombsky, J.D.Holt, K.P.Jackson, B.Lee, M.R.Pearson, A.Gaudin, B.Dej, C.Hohr, G.Gwinner, D.Melconian

Tensor interaction constraints from β-decay recoil spin asymmetry of trapped atoms

RADIOACTIVITY 80Rb(β+); measured daughter nucleus recoil angular distributions, recoil asymmetry; deduced tensor interaction constraints. Spin-polarized nucleus. Comparison with standard model predictions.

doi: 10.1103/PhysRevC.79.015501
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2008LE12      Phys.Rev.Lett. 100, 192504 (2008)

K.G.Leach, C.E.Svensson, G.C.Ball, J.R.Leslie, R.A.E.Austin, D.Bandyopadhyay, C.Barton, E.Bassiachvilli, S.Ettenauer, P.Finlay, P.E.Garrett, G.F.Grinyer, G.Hackman, D.Melconian, A.C.Morton, S.Mythili, O.Newman, C.J.Pearson, M.R.Pearson, A.A.Phillips, H.Savajols, M.A.Schumaker, J.Wong

Internal γ Decay and the Superallowed Branching Ration for the β+ Emitter 38Km

RADIOACTIVITY 38mK(β+), 38mCl(β+);measured positron spectra, Eγ, Iγ, βγ-coin, T1/2; deduced Ft for superallowed decay, comparison with other superallowed decays.

doi: 10.1103/PhysRevLett.100.192504
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2008RY03      Phys.Rev.Lett. 101, 012501 (2008)

V.L.Ryjkov, M.Brodeur, T.Brunner, M.Smith, R.Ringle, A.Lapierre, F.Ames, P.Bricault, M.Dombsky, P.Delheij, D.Lunney, M.R.Pearson, J.Dilling

Direct Mass Measurement of the Four-Neutron Halo Nuclide 8He

ATOMIC MASSES 8He; measured mass using a penning trap.

doi: 10.1103/PhysRevLett.101.012501
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2008TA11      Phys.Rev. C 77, 052501 (2008)

E.R.Tardiff, J.A.Behr, T.E.Chupp, K.Gulyuz, R.S.Lefferts, W.Lorenzon, S.R.Nuss-Warren, M.R.Pearson, N.Pietralla, G.Rainovski, J.F.Sell, G.D.Sprouse

Polarization and relaxation rates of radon

RADIOACTIVITY 209Fr(EC) [from 197Au(16O, 4n), E=91 MeV]; measured Eγ, Iγ, spin exchange polarization, quadrupole-dominated wall relaxationrate, dependence of γ-ray anisotropies on temperature.

doi: 10.1103/PhysRevC.77.052501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2007ME19      Phys.Lett. B 649, 370 (2007)

D.Melconian, J.A.Behr, D.Ashery, O.Aviv, P.G.Bricault, M.Dombsky, S.Fostner, A.Gorelov, S.Gu, V.Hanemaayer, K.P.Jackson, M.R.Pearson, I.Vollrath

Measurement of the neutrino asymmetry in the β decay of laser-cooled, polarized 37K

doi: 10.1016/j.physletb.2007.04.047
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2007TA17      Nucl.Instrum.Methods Phys.Res. A579, 472 (2007)

E.R.Tardiff, T.E.Chupp, W.Lorenzon, S.R.Nuss-Warren, J.A.Behr, M.R.Pearson, K.Gulyuz, R.S.Lefferts, N.Pietralla, G.Rainovski, J.F.Sell, G.D.Sprouse

Polarization and relaxation of 209Rn

RADIOACTIVITY 209Rn(EC); measured Eγ, Iγ, polarization and relaxation.

doi: 10.1016/j.nima.2007.04.105
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2007ZG01      Acta Phys.Pol. B38, 1179 (2007)

E.F.Zganjar, T.Achtzehn, D.Albers, C.Andreoiu, A.N.Andreyev, R.A.E.Austin, G.C.Ball, J.A.Behr, G.C.Biosvert, P.Bricault, S.Bishop, R.S.Chakrawarthy, R.Churchman, D.Cross, E.Cunningham, J.M.D'Auria, M.Dombsky, P.Finlay, P.E.Garrett, G.F.Grinyer, G.Hackman, V.Hanemaayer, J.C.Hardy, D.F.Hodgson, B.Hyland, V.Iacob, P.Klages, K.A.Koopmans, W.D.Kulp, J.Lassen, J.P.Lavoie, J.R.Leslie, T.Linder, J.A.Macdonald, H.-B.Mak, D.Melconian, A.C.Morton, W.E.Ormand, C.J.Osborne, C.J.Pearson, M.R.Pearson, A.A.Phillips, A.Piechaczek, J.Ressler, F.Sarazin, G.Savard, M.A.Schumaker, H.C.Scraggs, C.E.Svensson, J.J.Valiente-Dobon, I.S.Towner, J.C.Waddington, P.M.Walker, K.Wendt, J.L.Wood

Superallowed Beta Decay Studies at TRIUMF - Nuclear Structure and Fundamental Symmetries


2006HY02      Phys.Rev.Lett. 97, 102501 (2006)

B.Hyland, C.E.Svensson, G.C.Ball, J.R.Leslie, T.Achtzehn, D.Albers, C.Andreoiu, P.Bricault, R.Churchman, D.Cross, M.Dombsky, P.Finlay, P.E.Garrett, C.Geppert, G.F.Grinyer, G.Hackman, V.Hanemaayer, J.Lassen, J.P.Lavoie, D.Melconian, A.C.Morton, C.J.Pearson, M.R.Pearson, A.A.Phillips, M.A.Schumaker, M.B.Smith, I.S.Towner, J.J.Valiente-Dobon, K.Wendt, E.F.Zganjar

Precision Branching Ratio Measurement for the Superallowed β+ Emitter 62Ga and Isospin-Symmetry-Breaking Corrections in A ≥ 62 Nuclei

RADIOACTIVITY 62Ga(β+) [from Zr(p, X)]; measured Eγ, Iγ, βγ-coin; deduced superallowed Fermi branching ratio, ft. 62Zn deduced levels, J, π. Comparison with model predictions.

doi: 10.1103/PhysRevLett.97.102501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2006PH01      Phys.Rev. C 74, 027302 (2006)

A.A.Phillips, C.Andreoiu, G.C.Ball, D.Bandyopadhyay, J.A.Behr, T.E.Chupp, P.Finlay, P.E.Garrett, G.F.Grinyer, G.Hackman, M.E.Hayden, B.Hyland, S.R.Nuss-Warren, M.R.Pearson, M.A.Schumaker, M.B.Smith, C.E.Svensson, E.R.Tardiff, J.J.Valiente-Dobon, T.Warner

Half-life of 120Xe

RADIOACTIVITY 120Cs, 120Xe, 120I(β+), (EC); measured Eγ, Iγ, T1/2.

doi: 10.1103/PhysRevC.74.027302
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2006SA52      Hyperfine Interactions 171, 181 (2006)

R.Sanchez, W.Nortershauser, A.Dax, G.Ewald, S.Gotte, R.Kirchner, H.-J.Kluge, T.Kuhl, A.Wojtaszek, B.A.Bushaw, G.W.F.Drake, Z.-C.Yan, C.Zimmermann, D.Albers, J.Behr, P.Bricault, J.Dilling, M.Dombsky, J.Lassen, C.D.P.Levy, M.R.Pearson, E.J.Prime, V.Ryjkov

Nuclear charge radius of 11Li

NUCLEAR MOMENTS 11Li; measured optical isotope shift; deduced charge radius. Laser spectroscopy.

doi: 10.1007/s10751-007-9507-6
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2005GO11      Phys.Rev.Lett. 94, 142501 (2005)

A.Gorelov, D.Melconian, W.P.Alford, D.Ashery, G.Ball, J.A.Behr, P.G.Bricault, J.M.D'Auria, J.Deutsch, J.Dilling, M.Dombsky, P.Dube, J.Fingler, U.Giesen, F.Gluck, S.Gu, O.Hausser, K.P.Jackson, B.K.Jennings, M.R.Pearson, T.J.Stocki, T.B.Swanson, M.Trinczek

Scalar Interaction Limits from the β-ν Correlation of Trapped Radioactive Atoms

RADIOACTIVITY 38mK(β+); measured Eβ, recoil spectrum, (recoil)β-coin; deduced β-ν correlation parameter. Magneto-optical trap.

doi: 10.1103/PhysRevLett.94.142501
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2003ME08      Nucl.Instrum.Methods Phys.Res. B204, 540 (2003)

D.Melconian, D.Ashery, G.Ball, J.A.Behr, P.Bricault, B.A.Brown, M.Dombsky, K.P.Jackson, S.Fostner, A.Gorelov, M.N.Groves, S.Gu, M.R.Pearson, I.S.Towner, M.Trinczek, I.Vollrath

Measuring isospin mixing in 36Ar using a polarized, neutral atom trap

RADIOACTIVITY 37K(EC); measured β-asymmetry from polarized source. Optical pumping, application to planned experiment discussed.

doi: 10.1016/S0168-583X(02)02129-8
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2002SP02      Eur.Phys.J. A 13, 239 (2002)

G.D.Sprouse, S.Aubin, E.Gomez, J.S.Grossman, L.A.Orozco, M.R.Pearson, M.True

Atomic Probes of Electromagnetic and Weak Interactions with Trapped Radioactive Atoms

NUCLEAR MOMENTS 208,209,210,211,212Fr; analyzed hfs, radii. Trapped radioactive atoms.

doi: 10.1007/s10050-002-8749-6
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2002SP04      Nucl.Phys. A701, 597c (2002)

G.D.Sprouse, R.P.Fliller III, J.S.Grossman, L.A.Orozco, M.R.Pearson

Traps for Neutral Radioactive Atoms

NUCLEAR MOMENTS 208,209,210,211,212Fr; measured hfs. Laser trap.

doi: 10.1016/S0375-9474(01)01652-9
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2000GR20      Phys.Scr. T86, 16 (2000)

J.S.Grossman, L.A.Orozco, M.R.Pearson, G.D.Sprouse

Spectroscopy of Francium Isotopes

NUCLEAR MOMENTS 208,209,210,211,212Fr; measured hfs; deduced nuclear magnetization. Trapped ions.

doi: 10.1238/Physica.Topical.086a00016
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2000GR25      Phys.Rev. A62, 052507 (2000)

J.M.Grossman, R.P.Fliller III, T.E.Mehlstaubler, L.A.Orozco, M.R.Pearson, G.D.Sprouse, W.Z.Zhao

Energies and Hyperfine Splittings of the 7D Levels of Atomic Francium

NUCLEAR MOMENTS 210Fr; measured hfs. Optical double-resonance spectroscopy.

doi: 10.1103/PhysRevA.62.052507
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2000LI52      Hyperfine Interactions 129, 109 (2000)

M.Lindroos, J.Billowes, C.Broude, G.Goldring, H.Haas, M.Hass, L.Mueller, M.R.Pearson, L.Weissman

Magnetic moments of mirror nuclei with tilted-foil polarization

NUCLEAR MOMENTS 23Mg; measured β asymmetry and NMR resonance for the ground state using the tilted-foil (TF) polarization and β-NMR techniques at the ISOLDE facility.

doi: 10.1023/A:1012690623076
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2000PE30      J.Phys.(London) G26, 1829 (2000)

M.R.Pearson, P.Campbell, K.Leerungnavarat, J.Billowes, I.S.Grant, M.Keim, J.Kilgallon, I.D.Moore, R.Neugart, M.Neuroth, S.Wilbert, and the ISOLDE Collaboration

Nuclear Moments and Charge Radii of Bismuth Isotopes

NUCLEAR MOMENTS 205,206,207,208,209,210,212,213Bi; measure hfs, isotope shifts; deduced μ, quadrupole moment. Comparison with Hg, Tl, Pb and Po isotopes and with Shell model calculations.

doi: 10.1088/0954-3899/26/12/307
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1999GR15      Phys.Rev.Lett. 83, 935 (1999)

J.S.Grossman, L.A.Orozco, M.R.Pearson, J.E.Simsarian, G.D.Sprouse, W.Z.Zhao

Hyperfine Anomaly Measurements in Francium Isotopes and the Radial Distribution of Neutrons

NUCLEAR MOMENTS 208,209,210,211,212Fr; measured hfs; deduced hyperfine anomaly, role of neutron radial distributions.

doi: 10.1103/PhysRevLett.83.935
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1997CA39      J.Phys.(London) G23, 1141 (1997)

P.Campbell, J.Billowes, E.C.A.Cochrane, J.L.Cooke, T.G.Cooper, P.Dendooven, D.E.Evans, I.S.Grant, J.A.R.Griffith, A.Honkanen, M.Huhta, M.Oinonen, M.R.Pearson, H.Penttila, J.R.Persson, D.S.Richardson, G.Tungate, P.D.Wheeler, L.Zybert, J.Aysto

A Thirty Second Isomer in 171Hf

NUCLEAR REACTIONS 170Yb(α, 3n), E=50 MeV; measured Iγ(t). 171mHf deduced T1/2. Ion guide online isotope seperator.

RADIOACTIVITY 171mHf(IT) [from 170Yb(α, 3n), E=50 MeV]; measured Iγ(t); deduced T1/2. Ion guide online isotope seperator.

doi: 10.1088/0954-3899/23/9/014
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1997CO26      J.Phys.(London) G23, L97 (1997)

J.L.Cooke, J.Billowes, P.Campbell, E.C.A.Cochrane, T.G.Cooper, P.Dendooven, D.E.Evans, J.A.R.Griffith, I.S.Grant, A.Honkanen, M.Huhta, J.M.G.Levins, M.Oinonen, M.R.Pearson, H.Penttila, J.A.Persson, D.S.Richardson, G.Tungate, P.D.Wheeler, L.Zybert, J.Aysto

First Measurement of Radioisotopes by Collinear Laser Spectroscopy at an Ion-Guide Separator

NUCLEAR REACTIONS 238U(p, F), E=25 MeV; measured 112Rh yield vs electrode voltage, beam current. Molecular beam, ion-guide isotope separator, ion-photon coincidence.

RADIOACTIVITY 140,142,144Ba [from 238U(p, F), E=25 MeV]; measured optical isotope shifts. Ion-guide isotope separator, collinear laser spectroscopy, ion-photon coincidence.

doi: 10.1088/0954-3899/23/11/002
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1997LE19      J.Phys.(London) G23, 1145 (1997)

J.M.G.Levins, J.Billowes, P.Campbell, M.R.Pearson

The Quadrupole Moment of 26Al

NUCLEAR MOMENTS 26Al; measured isotope shifts, hfs; deduced quadrupole moment. Atomic beam laser spectroscopy. Shell model comparison.

doi: 10.1088/0954-3899/23/9/015
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1996CO04      J.Phys.(London) G22, 99 (1996)

T.G.Cooper, J.Billowes, P.Campbell, M.R.Pearson

The Nuclear Magnetic Moment of 26Al by Atomic Beam Laser Spectroscopy

RADIOACTIVITY 26Al(β+), (EC); measured hfs; deduced μ. Atomic beam laser spectroscopy. Model comparison.

doi: 10.1088/0954-3899/22/1/008
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