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AbstractAbstract
[en] Difficulties in performing the calculations of E2, M1 matrix elements and incoherences in existing literature are reported for the mixing of bands with several valence nuclei. Various prescriptions may lead to rather different results: an illustration is given for the 23Na nucleus
Original Title
Calculs de transitions E2, M1 et melange de bandes avec plusieurs nucleons de valence
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Journal Article
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Nuovo Cimento. A; v. 44(3); p. 427-432
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AbstractAbstract
No abstract available
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Journal Article
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Physical Review Letters; v. 32(12); p. 687-690
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AbstractAbstract
[en] We investigate the effects of a magnetic field with low to intermediate strength on several spectroscopic properties of the sodium atom. A model potential is used to describe the core of sodium, reducing the study of the system to an effective one-particle problem. All states with principal quantum numbers n = 3, 4, 5, 6 and 7 are studied and analysed. A grid of twenty values for the field strength in the complete regime B = 0-0.02 a.u. is employed. Ionisation energies, transition wavelengths and their dipole oscillator strengths are presented. (authors)
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Source
30 refs.
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Journal Article
Journal
European Physical Journal. D, Atomic, Molecular and Optical Physics; ISSN 1434-6060;
; v. 23(no.2); p. 189-199

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AbstractAbstract
[en] Published in summary form only
Source
Graz Univ. (Austria); 199 p; 1988; p. 118; 9. European experimental NMR conference; Bad Aussee (Austria); 16-20 May 1988
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Miscellaneous
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Conference
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AbstractAbstract
[en] Doubly quantized vortices were topologically imprinted in vertical bar F=1> Na23 condensates, and their time evolution was observed using a tomographic imaging technique. The decay into two singly quantized vortices was characterized and attributed to dynamical instability. The time scale of the splitting process was found to be longer at higher atom density
Source
(c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] We describe our experimental apparatus for quickly producing large Bose-Einstein condensates of 23Na atoms. We collect atoms in a dark magneto-optical trap from a zero-crossing Zeeman slower and then capture the atoms in an optically plugged magnetic quadrupole trap and apply rf evaporation to cool the atoms into the quantum degenerate regime. We slightly displace a circular plug beam from the magnetic trap center to break the ring symmetry and form a single global minimum in the combined trapping potential. Our system reliably generates a quasipure condensate with over 107 atoms every 17 s. We load the condensate into an elongated optical dipole trap.
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18 refs, 5 figs
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Journal Article
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Journal of the Korean Physical Society; ISSN 0374-4884;
; v. 59(2); p. 211-216

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AbstractAbstract
No abstract available
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14 refs.
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Journal Article
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Canadian Journal of Physics; v. 52(1); p. 49-60
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AbstractAbstract
[en] We have resolved closely spaced hyperfine levels in the 3P3/2 state of 23Na with a technique of coherent-control spectroscopy that uses co-propagating beams. The probe beam is locked to one hyperfine transition, while the control beam is scanned across a neighbouring transition. An acousto-optic modulator placed in the path of the control beam provides calibrated frequency offsets for measuring the hyperfine intervals. We thus obtain precise values for the hyperfine constants in the 3P3/2 state: A 18.530(3) MHz and B = 2.721(8) MHz, which improve previous values significantly
Primary Subject
Source
S0953-4075(06)22214-4; Available online at http://stacks.iop.org/0953-4075/39/3111/b6_14_017.pdf or at the Web site for the Journal of Physics. B, Atomic, Molecular and Optical Physics (ISSN 1361-6455) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Physics. B, Atomic, Molecular and Optical Physics; ISSN 0953-4075;
; CODEN JPAPEH; v. 39(14); p. 3111-3119

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AbstractAbstract
[en] 12C(12C,pγ)23Na proton-γ angular correlations were measured at E/subB/=38.82 MeV for the 9.042- and 9.805-MeV states in 23Na which decay to levels at 7.270, 6.235, and 5.534 MeV with branching ratios of 20%, 60%, and 20%, respectively, for the 9.042-MeV state, and 30%, 50%, and 20%, respectively, for the 9.805-MeV state. Angular correlations and lifetime data eliminate 17/2 assignments for either state
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Journal Article
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Physical Review Letters; v. 35(11); p. 710-713
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[en] 23Na nuclear magnetic resonance (NMR) measurements on poly (propylene oxide) (PPO) and siloxane based polymer electrolytes containing various sodium salts at a single nominal concentration are reported. In addition, differential scanning calorimetry (DSC) and electrical conductivity studies were carried out on the PPO materials. The NMR-determined mobile Na+ concentrations and DSC results provide evidence for ionic aggregation effects which, for some samples, result in salt precipitation at elevated temperatures. 23Na chemical shifts observed in solid state NMR due to mobile Na+-anion interactions influence ionic transport as well as the number of available carriers. (author). 19 refs.; 7 figs
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