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NSR database version of April 11, 2024.

Search: Author = B.Maass

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2022BA15      Phys.Lett. B 829, 137064 (2022)

S.W.Bai, A.Koszorus, B.S.Hu, X.F.Yang, J.Billowes, C.L.Binnersley, M.L.Bissell, K.Blaum, P.Campbell, B.Cheal, T.E.Cocolios, R.P.de Groote, C.S.Devlin, K.T.Flanagan, R.F.Garcia Ruiz, H.Heylen, J.D.Holt, A.Kanellakopoulos, J.Kramer, V.Lagaki, B.Maass, S.Malbrunot-Ettenauer, T.Miyagi, R.Neugart, G.Neyens, W.Nortershauser, L.V.Rodriguez, F.Sommer, A.R.Vernon, S.J.Wang, X.B.Wang, S.G.Wilkins, Z.Y.Xu, C.X.Yuan

Electromagnetic moments of scandium isotopes and N=28 isotones in the distinctive 0f_7/2 orbit

NUCLEAR MOMENTS ^{41,43,45,46,47,49}Sc; measured frequencies; deduced hfs constants, electromagnetic dipole and quadrupole moments. Comparison with theoretical calculations. Two collinear laser spectroscopy (CLS) setups, COLLAPS and CRIS at ISOLDE-CERN.

doi: 10.1016/j.physletb.2022.137064
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2022BU16      Phys.Rev.Lett. 128, 202502 (2022)

M.T.Burkey, G.Savard, A.T.Gallant, N.D.Scielzo, J.A.Clark, T.Y.Hirsh, L.Varriano, G.H.Sargsyan, K.D.Launey, M.Brodeur, D.P.Burdette, E.Heckmaier, K.Joerres, J.W.Klimes, K.Kolos, A.Laminack, K.G.Leach, A.F.Levand, B.Longfellow, B.Maass, S.T.Marley, G.E.Morgan, P.Mueller, R.Orford, S.W.Padgett, A.Perez Galvan, J.R.Pierce, D.Ray, R.Segel, K.Siegl, K.S.Sharma, B.S.Wang

Improved Limit on Tensor Currents in the Weak Interaction from ⁸Li β Decay

RADIOACTIVITY ⁸Li(β^-); measured decay products, Eβ, Iβ; deduced tensor currents in the low-energy regime by examining the β-ν correlation of trapped ⁸Li ions with the Beta-decay Paul Trap. Comparison with the standard model prediction.

doi: 10.1103/PhysRevLett.128.202502
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2020BR12      Phys. Rev. Res. 2, 022035 (2020)

B.A.Brown, K.Minamisono, J.Piekarewicz, H.Hergert, D.Garand, A.Klose, K.Konig, J.D.Lantis, Y.Liu, B.Maass, A.J.Miller, W.Nortershauser, S.V.Pineda, R.C.Powel, D.M.Rossi, F.Sommer, C.Sumithrarachchi, A.Teigelhofer, J.Watkins, R.Wirth

Implications of the ³⁶Ca-³⁶S and ³⁸Ca-³⁸Ar difference in mirror charge radii on the neutron matter equation of state

NUCLEAR STRUCTURE ³⁶Ca, ³⁶S, ³⁸Ca, ³⁸Ar; analyzed available data; deduced differences in charge radii between mirror nuclei, the slope of the symmetry energy L at the nuclear saturation density. Comparison with theoretical calculations of charge radii, differences and symmetry energy.

doi: 10.1103/PhysRevResearch.2.022035
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2020RO19      Phys.Rev. C 102, 051301(R) (2020)

L.V.Rodriguez, D.L.Balabanski, M.L.Bissell, K.Blaum, B.Cheal, G.De Gregorio, J.Ekman, R.F.Garcia Ruiz, A.Gargano, G.Georgiev, W.Gins, C.Gorges, H.Heylen, A.Kanellakopoulos, S.Kaufmann, V.Lagaki, S.Lechner, B.Maass, S.Malbrunot-Ettenauer, R.Neugart, G.Neyens, W.Nortershauser, S.Sailer, R.Sanchez, S.Schmidt, L.Wehner, C.Wraith, L.Xie, Z.Y.Xu, X.F.Yang, D.T.Yordanov

Doubly-magic character of ¹³²Sn studied via electromagnetic moments of ¹³³Sn

NUCLEAR MOMENTS ¹³³Sn; measured hyperfine structure spectra, magnetic dipole moment (μ) and electric quadrupole moment (Q) using high-resolution collinear laser spectroscopy at ISOLDE-CERN facility; deduced 1f_7/2 neutron orbital configuration for ¹³³Sn g.s., and doubly-magic character of ¹³²Sn. ¹³³Sn activity produced in fission of a uranium carbide target by neutrons from spallation reaction on tungsten by high-energy protons, followed by laser ionization and mass selection through a linear Paul trap. Systematics of magnetic dipole moments (μ) and electric quadrupole moments (Q) for N=83 isotones: ¹³³Sn, ¹³⁵Te, ¹³⁷Xe, ¹³⁹Ba, ¹⁴¹Ce, ¹⁴³Nd, ¹⁴⁵Sm, ¹⁴⁷Gd and ¹⁴⁹Dy. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.102.051301
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2020YO07      Commun. Phys. 3, 107 (2020)

D.T.Yordanov, L.V.Rodriguez, D.L.Balabanski, J.Bieron, M.L.Bissell, K.Blaum, B.Cheal, J.Ekman, G.Gaigalas, R.F.G.Ruiz, G.Georgiev, W.Gins, M.R.Godefroid, C.Gorges, Z.Harman, H.Heylen, P.Jonsson, A.Kanellakopoulos, S.Kaufmann, C.H.Keitel, V.Lagaki, S.Lechner, B.Maass, S.Malbrunot-Ettenauer, W.Nazarewicz, R.Neugart, G.Neyens, W.Nortershauser, N.S.Oreshkina, A.Papoulia, P.Pyykko, P.-G.Reinhard, S.Sailer, R.Sanchez, S.Schiffmann, S.Schmidt, L.Wehner, C.Wraith, L.Xie, Z.Xu, X.Yang

Structural trends in atomic nuclei from laser spectroscopy of tin

NUCLEAR MOMENTS ^{109,115,117,119,121,123,125,127,129,131}Sn; measured frequency scales relative to the fine-structure splittings in the transitions; deduced mean square charge-radii changes, high-precision magnetic moments, quadrupole moments.

doi: 10.1038/s42005-020-0348-9
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2019GO12      Phys.Rev.Lett. 122, 192502 (2019)

C.Gorges, L.V.Rodriguez, D.L.Balabanski, M.L.Bissell, K.Blaum, B.Cheal, R.F.Garcia Ruiz, G.Georgiev, W.Gins, H.Heylen, A.Kanellakopoulos, S.Kaufmann, M.Kowalska, V.Lagaki, S.Lechner, B.Maass, S.Malbrunot-Ettenauer, W.Nazarewicz, R.Neugart, G.Neyens, W.Nortershauser, P.-G.Reinhard, S.Sailer, R.Sanchez, S.Schmidt, L.Wehner, C.Wraith, L.Xie, Z.Y.Xu, X.F.Yang, D.T.Yordanov

Laser Spectroscopy of Neutron-Rich Tin Isotopes: A Discontinuity in Charge Radii across the N=82 Shell Closure

NUCLEAR MOMENTS ^{108,110,112,114,116,118,120,122,124,126,128,130,132,134}Sn; measured frequencies; deduced isotope shifts, mean-square nuclear charge radii.

doi: 10.1103/PhysRevLett.122.192502
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2019KL06      Phys.Rev. C 99, 061301 (2019)

A.Klose, K.Minamisono, A.J.Miller, B.A.Brown, D.Garand, J.D.Holt, J.D.Lantis, Y.Liu, B.Maass, W.Nortershauser, S.V.Pineda, D.M.Rossi, A.Schwenk, F.Sommer, C.Sumithrarachchi, A.Teigelhofer, J.Watkins

Ground-state electromagnetic moments of ³⁷Ca

NUCLEAR MOMENTS ^37,39Ca; measured hyperfine structure spectra using the collinear laser spectroscopy technique at NSCL-BECOLA facility; deduced hyperfine coupling constants, and isoscalar- and isovector-magnetic moment of the ground states. ^37,39Ca produced in ⁹Be(⁴⁰Ca, X), E=140 MeV/nucleon reaction, and separation of fragments using A1900 fragment separator at NSCL-MSU. Comparison with shell model calculations using the universal sd model-space Hamiltonians (USDA/B). Systematics of experimental and theoretical magnetic moments of ground states of ^37,39Ca, ³⁷Cl and ³⁹K.

doi: 10.1103/PhysRevC.99.061301
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2019MA33      Phys.Rev.Lett. 122, 182501 (2019)

B.Maass, T.Huther, K.Konig, J.Kramer, J.Krause, A.Lovato, P.Muller, K.Pachucki, M.Puchalski, R.Roth, R.Sanchez, F.Sommer, R.B.Wiringa, W.Nortershauser

Nuclear Charge Radii of ^{10, 11}B

NUCLEAR MOMENTS ^10,11B; measured frequencies; deduced nuclear charge radii by combining high-accuracy ab initio mass-shift calculations and a high-accuracy measurement of the isotope shift.

doi: 10.1103/PhysRevLett.122.182501
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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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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 ^{53,55,57,59,61,63}Mn; 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 ^{51,53,54,55,56,57,58,59,60,61,62,63,64}Mn; 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 ^{53,55,57,59,61,63,65}Mn; 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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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, 53}Fe 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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2015UL01      J.Phys.(London) B48, 144022 (2015)

J.Ullmann, Z.Andelkovic, A.Dax, W.Geithner, C.Geppert, C.Gorges, M.Hammen, V.Hannen, S.Kaufmann, K.Konig, Y.Litvinov, M.Lochmann, B.Maass, J.Meisner, T.Murbock, R.Sanchez, M.Schmidt, S.Schmidt, M.Steck, T.Stohlker, R.C.Thompson, J.Vollbrecht, C.Weinheimer, W.Nortershauser

An improved value for the hyperfine splitting of hydrogen-like ²⁰⁹BI⁸²⁺

ATOMIC PHYSICS ²⁰⁹Bi; measured time structure of the fluorescence resonance signal; deduced the rest frame transition wavelength and transition energies. Comparison with theoretical calculations.

doi: 10.1088/0953-4075/48/14/144022
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