J
J. A. Becker
Researcher at Lawrence Livermore National Laboratory
Publications - 232
Citations - 3219
J. A. Becker is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Neutron & Fission. The author has an hindex of 28, co-authored 231 publications receiving 3019 citations.
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Journal ArticleDOI
Energy splitting of the ground-state doublet in the nucleus 229Th.
B. R. Beck,J. A. Becker,Peter Beiersdorfer,Gregory V. Brown,Kenton J. Moody,J. B. Wilhelmy,F. S. Porter,Caroline A. Kilbourne,R. L. Kelley +8 more
TL;DR: The energy splitting of the 229Th ground-state doublet is measured to be 7.6+/-0.5 eV, significantly greater than earlier measurements.
Journal ArticleDOI
Pseudospin symmetry and quantized alignment in nuclei.
F. S. Stephens,M. A. Deleplanque,J. E. Draper,R. M. Diamond,A. O. Macchiavelli,C. W. Beausang,W. Korten,W. H. Kelly,F. Azaiez,J. A. Becker,E. A. Henry,S. W. Yates,M. J. Brinkman,A. Kuhnert,Jolie Cizewski +14 more
TL;DR: Nine superdeformed bands in several nuclei of the mass-190 region all have transitions of the same or equivalent energies to within an average of about 1 keV--almost identical.
Journal ArticleDOI
Excitation Energies and Spins of a Superdeformed Band in 194 Hg from One-Step Discrete Decays to the Yrast Line
T. L. Khoo,M. P. Carpenter,T. Lauritsen,Dieter Ackermann,I. Ahmad,D. J. Blumenthal,S. M. Fischer,R. V. F. Janssens,D. T. Nisius,E. F. Moore,A. Lopez-Martens,Thomas Døssing,R. Kruecken,S. J. Asztalos,J. A. Becker,L. A. Bernstein,R. M. Clark,M. A. Deleplanque,R. M. Diamond,P. Fallon,L. P. Farris,F. Hannachi,E. A. Henry,A. Korichi,I. Y. Lee,A. O. Macchiavelli,F. S. Stephens +26 more
TL;DR: The excitation energies and spins of all members of the lowest SD band are established for the first time, together with their likely parity.
Journal ArticleDOI
Spin alignment in superdeformed Hg nuclei.
F. S. Stephens,M. A. Deleplanque,J. E. Draper,R. M. Diamond,C. W. Beausang,W. Korten,W. H. Kelly,F. Azaiez,J. A. Becker,E. A. Henry,N. Roy,M. J. Brinkman,J. A. Cizewski,S. W. Yates,A. Kuhnert +14 more
TL;DR: One of the superdeformed rotational bands in {Sup 194}Hg has transition energies (rotational frequencies) that are equal within about 0.1% to those of the (only known) band in {sup 192}HG, suggesting an interpretation in terms of aligned pseudo (intrinsic) spin.
Journal ArticleDOI
New features of superdeformed bands in 194Hg.
Bo Cederwall,R. V. F. Janssens,M. J. Brinkman,I. Y. Lee,Iftikhar Ahmad,J. A. Becker,M. P. Carpenter,B. Crowell,M. A. Deleplanque,R. M. Diamond,J. E. Draper,C. Duyar,P. Fallon,L. P. Farris,E. A. Henry,R. G. Henry,J. R. Hughes,T. L. Khoo,T. Lauritsen,A. O. Macchiavelli,E. Rubel,F. S. Stephens,M. A. Stoyer,W. Satula,I. Wiedenhoever,Ramon Wyss +25 more
TL;DR: Two new features of superdeformed (SD) bands in the A almost-equal-to 190 region emerge from a study of Hg-194 with the Gammasphere detector array, suggesting the presence of terms with fourfold symmetry in the SD Hamiltonian.