A new trap loading mechanism for hydrogenThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

In this paper, we report on our recent advances on a new trap loading mechanism for neutral atoms. The idea is based on our recently published results for chromium spectroscopy of atoms released from a solid neon matrix at cryogenic temperatures. The proposed trap loading mechanism consists of magnetically capturing the low-energy fraction of paramagnetic atoms being released from the matrix, while the host Ne atoms stick to the walls. Two different designs are described: one with a superconducting magnet producing a trap depth of 3 T and another with a superconducting dynamically switched magnet that generates a trap depth of about 1 T. Some preliminary results are presented.

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The BMV project: Search for photon oscillations into massive particlesThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

Canadian Journal of Physics ◽

10.1139/p08-141 ◽

2009 ◽

Vol 87 (7) ◽

pp. 735-741

Author(s):

C. Robilliard ◽

B. Pinto Da Souza ◽

F. Bielsa ◽

J. Mauchain ◽

M. Nardone ◽

...

Keyword(s):

Magnetic Field ◽

Transverse Magnetic Field ◽

Transverse Magnetic ◽

Atomic Systems ◽

International Conference ◽

Preliminary Results ◽

Research Activities ◽

Set Up ◽

École Polytechnique ◽

Project Search

In this contribution to PSAS08 we report on the research activities developed in our Toulouse group in the framework of the BMV project, concerning the search for photon oscillations into massive particles, such as axion-like particles, in the presence of a strong transverse magnetic field. We recall our main result obtained in collaboration with LULI at École Polytechnique (Palaiseau, France). We also present the very preliminary results obtained with the BMV experiment which is set up at LNCMI (Toulouse, France).

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Preliminary Results of Low Energy Sputter Yields of Boron Nitride due to Xenon Ion Bombardment (Preprint)

10.21236/ada484455 ◽

2008 ◽

Author(s):

James L. Topper ◽

Binyamin Rubin ◽

Cody C. Farnell ◽

Azer P. Yalin

Keyword(s):

Boron Nitride ◽

Ion Bombardment ◽

Low Energy ◽

Preliminary Results

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Vickers hardness properties of structural materials for superconducting magnet at cryogenic temperatures

Cryogenics ◽

10.1016/s0011-2275(01)00118-7 ◽

2001 ◽

Vol 41 (7) ◽

pp. 505-511 ◽

Cited By ~ 23

Author(s):

Y Yoshino ◽

A Iwabuchi ◽

R Onodera ◽

A Chiba ◽

K Katagiri ◽

...

Keyword(s):

Vickers Hardness ◽

Superconducting Magnet ◽

Structural Materials ◽

Cryogenic Temperatures

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Observations of the galactic center with the GSFC Low-Energy Gamma-Ray Spectrometer: Preliminary results

10.1063/1.33502 ◽

1982 ◽

Author(s):

W. S. Paciesas ◽

T. L. Cline ◽

B. J. Teegarden ◽

J. Tueller ◽

P. Durouchoux ◽

...

Keyword(s):

Gamma Ray ◽

Galactic Center ◽

Low Energy ◽

Preliminary Results ◽

Gamma Ray Spectrometer ◽

Energy Gamma

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Non-spherical proton shape and hydrogen hyperfine splittingThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

Canadian Journal of Physics ◽

10.1139/p09-059 ◽

2009 ◽

Vol 87 (7) ◽

pp. 773-783 ◽

Cited By ~ 8

Author(s):

A. J. Buchmann

Keyword(s):

Charge Distribution ◽

Hyperfine Splitting ◽

Spherical Charge ◽

Atomic Systems ◽

Absolute Value ◽

International Conference

We show that the non-spherical charge distribution of the proton manifests itself in hydrogen hyperfine splitting as an increase (in absolute value) of the proton Zemach radius and polarization contributions.

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Orbit–orbit interaction inn fN electron configurations

Canadian Journal of Physics ◽

10.1139/p69-238 ◽

1969 ◽

Vol 47 (17) ◽

pp. 1885-1888 ◽

Cited By ~ 6

Author(s):

K. M. S. Saxena ◽

G. Malli

Keyword(s):

Orbit Interaction ◽

Matrix Elements ◽

Atomic Systems ◽

Hartree Fock ◽

The Matrix

The expressions of the matrix elements of the orbit–orbit interaction for various fN electron configurations are computed and tabulated for general usage. These expressions are used to evaluate the Hartree–Fock values of the orbit–orbit interaction in all the states for a large number of fN electron atomic systems.

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Progress in precise laser spectroscopy of antiprotonic helium atomsThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

Canadian Journal of Physics ◽

10.1139/p10-059 ◽

2011 ◽

Vol 89 (1) ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Masaki Hori

Keyword(s):

Laser Spectroscopy ◽

Optical Transition ◽

Antiprotonic Helium ◽

Atomic Systems ◽

International Conference

The ASACUSA collaboration at CERN has previously measured the optical transition frequencies of antiprotonic helium to a precision of <1 part in 108 by laser spectroscopy. We describe some recent theoretical and experimental developmental work carried out by our collaboration to further improve the experimental precision.

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THE HAGEDORN TRANSITION AND THE MATRIX MODEL FOR STRINGS

Modern Physics Letters A ◽

10.1142/s0217732398002205 ◽

1998 ◽

Vol 13 (26) ◽

pp. 2085-2094 ◽

Cited By ~ 13

Author(s):

B. SATHIAPALAN

Keyword(s):

Matrix Model ◽

Light Cone ◽

Degrees Of Freedom ◽

Low Energy ◽

Matrix Formalism ◽

Yang Mills ◽

Large N ◽

The Matrix ◽

The Continuum ◽

String Worldsheet

We use the matrix formalism to investigate what happens to strings above the Hagedorn temperature. We show that is not a limiting temperature but a temperature at which the continuum string picture breaks down. We study a collection of N D-0-branes arranged to form a string having N units of light-cone momentum. We find that at high temperatures the favored phase is one where the string worldsheet has disappeared and the low-energy degrees of freedom consists of N2 massless particles ("gluons"). The nature of the transition is very similar to the deconfinement transition in large-N Yang–Mills theories.

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Structural Changes in Confined Lysozyme

Journal of Biomechanical Engineering ◽

10.1115/1.3171565 ◽

2009 ◽

Vol 131 (7) ◽

Cited By ~ 6

Author(s):

Eduardo Reátegui ◽

Alptekin Aksan

Keyword(s):

Fourier Transform ◽

Infrared Spectroscopy ◽

Structural Changes ◽

Heat Denaturation ◽

Cryogenic Temperatures ◽

Key Factors ◽

Denaturation Temperature ◽

Novel Technologies ◽

Factors Influencing ◽

The Matrix

Proteins and enzymes can be encapsulated in nanoporous gels to develop novel technologies for biosensing, biocatalysis, and biosynthesis. When encapsulated, certain macromolecules retain high levels of activity and functionality and are more resistant to denaturation when exposed to extremes of pH and temperature. We have utilized intrinsic fluorescence and Fourier transform infrared spectroscopy to determine the structural transitions of encapsulated lysozyme in the range of −120°C<T<100°C. At cryogenic temperatures encapsulated lysozyme did not show cold denaturation, instead became more structured. However, at high temperatures, the onset of heat denaturation of confined lysozyme was reduced by 15°C when compared with lysozyme in solution. Altered dynamics of the solvent and pore size distribution of the nanopores in the matrix appear to be key factors influencing the decrease in the denaturation temperature.

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