J R Danielson
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Explore the profile of J R Danielson including associated specialties, affiliations and a list of published articles.
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31
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37
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Recent Articles
11.
Danielson J, Jones A, Natisin M, Surko C
Phys Rev Lett
. 2012 Sep;
109(11):113201.
PMID: 23005624
Positron binding to molecules is compared to the analogous electron-molecule bound states. For both, the bound lepton density is diffuse and remains outside the valence shell. Positron binding energies are...
12.
Jones A, Danielson J, Natisin M, Surko C, Gribakin G
Phys Rev Lett
. 2012 Apr;
108(9):093201.
PMID: 22463631
Positron annihilation on many molecules occurs via positron capture into vibrational Feshbach resonances, with annihilation rates often further enhanced by energy transfer to vibrational excitations weakly coupled to the positron...
13.
Weber T, Danielson J, Surko C
Rev Sci Instrum
. 2011 Feb;
82(1):016104.
PMID: 21280867
A procedure is described to extract beams from specially tailored electron plasmas in a Penning-Malmberg trap in a 4.8 T field. Transport to 1 mT is followed by extraction from...
14.
Danielson J, Gosselin J, Surko C
Phys Rev Lett
. 2010 Sep;
104(23):233201.
PMID: 20867236
Measurements of positron-molecule binding energies are made for molecules with large permanent dipole moments (>2.7 D), by studying vibrational-Feshbach-mediated annihilation resonances as a function of incident positron energy. The binding...
15.
Danielson J, Lee Y, Prineas J, Steiner J, Kira M, Koch S
Phys Rev Lett
. 2008 Feb;
99(23):237401.
PMID: 18233409
An experiment-theory comparison is presented to demonstrate terahertz-induced extreme-nonlinear transients in a GaAs/AlGaAs quantum-well system. The terahertz-pump and optical-probe experiments show pronounced spectral modulations of the light- and heavy-hole excitonic...
16.
Danielson J, Surko C, ONeil T
Phys Rev Lett
. 2007 Oct;
99(13):135005.
PMID: 17930602
Rotating electric fields are used to compress electron plasmas confined in a Penning-Malmberg trap. Bifurcation and hysteresis are observed between low-density and high-density steady states as a function of the...
17.
Danielson J, Surko C
Phys Rev Lett
. 2005 Feb;
94(3):035001.
PMID: 15698274
Electron plasmas in a Penning-Malmberg trap are compressed radially using a rotating electric field (the "rotating-wall technique"). For large electric fields, plasmas can be compressed over a broad range of...
18.
Danielson J, Anderegg F, Driscoll C
Phys Rev Lett
. 2004 Jul;
92(24):245003.
PMID: 15245092
Linear Landau damping and nonlinear wave-particle trapping oscillations are observed with standing plasma waves in a trapped pure electron plasma. For low wave amplitudes, the measured linear damping rate agrees...
19.
Anderegg F, Shiga N, Danielson J, Dubin D, Driscoll C, Gould R
Phys Rev Lett
. 2003 Apr;
90(11):115001.
PMID: 12688935
Thermally excited plasma modes are observed in near-thermal-equilibrium pure electron plasmas over a temperature range of 0.05<kT<5 eV. The measured thermal emission spectra together with a plasma-antenna coupling calibration uniquely...
20.
Danielson J, Capelli-Schellpfeffer M, Lee R
Hand Clin
. 2000 May;
16(2):225-34, viii.
PMID: 10791169
Electrical injuries to the upper extremity are far ranging in extent and vary in magnitude. Proper management requires an appreciation for the pathophysiology, clinical manifestations, and therapeutic options. Persistent neurologic...