scholarly journals Towards a first observation of magneto-electric directional anisotropy and linear birefringence in gasesThis 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.

2011 ◽  
Vol 89 (1) ◽  
pp. 159-164 ◽  
Author(s):  
C. Robilliard ◽  
G. Bailly
Keyword(s):  
Recent Progress ◽  
Ring Cavity ◽  
Measurement Procedure ◽  
Linear Birefringence ◽  
Atomic Systems ◽  
International Conference ◽  
Set Up ◽  
Electric Effects ◽  
High Finesse ◽  
Frequency Metrology

In this contribution to PSAS 2010, we report on recent progress on an experiment aimed at measuring small optical directional anisotropies by frequency metrology in a high-finesse ring cavity. We focus on our first experimental goal, the measurement of magneto-electric effects in gases. After a review of the expected effects in our set-up, we present the apparatus and the measurement procedure, showing that we already have the necessary sensitivity to start novel experiments.

Antiprotonic helium and kaonic helium – A tale of two exotic helium atomsThis 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.

2009 ◽  
Vol 87 (7) ◽  
pp. 835-842 ◽  
Author(s):  
R. S. Hayano
Keyword(s):  
Laser Spectroscopy ◽  
Recent Progress ◽  
Historical Background ◽  
Antiprotonic Helium ◽  
Past Study ◽  
Future Prospects ◽  
Atomic Systems ◽  
X Ray ◽  
Helium Atoms ◽  
International Conference

Recent progress on the precision laser spectroscopy of antiprotonic helium atoms, as well as on the X-ray spectroscopy of kaonic helium atoms, are presented. These two may appear to be unrelated topics (except that both involve exotic helium atoms), but in fact a past study of kaonic helium system led to the serendipitous discovery of antiprotonic helium. Some historical background connecting these two exotic helium atoms, as well as future prospects, are discussed.

Advances towards a new measurement of the 1S–2S transition of positroniumThis 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.

2011 ◽  
Vol 89 (1) ◽  
pp. 29-35 ◽  
Author(s):  
P. Crivelli ◽  
C. L. Cesar ◽  
U. Gendotti
Keyword(s):  
Experimental Technique ◽  
Laser System ◽  
Bound State ◽  
Atomic Systems ◽  
International Conference ◽  
Technological Advances ◽  
Set Up ◽  
Current Accuracy

In this paper, a new experiment is presented to measure the 1S–2S transition of positronium, the bound state of an electron and a positron. The goal is to improve the current accuracy by a factor of 5 to reach a precision of the order of 0.6 ppb, to check recent QED calculations. This accuracy is challenging, but it seems well within reach in view of the technological advances that have occurred during the last two decades. We will present the details of the experimental set-up, the advances in the production of positronium, the developments of the laser system, and as well our new experimental technique for the detection of Ps in the 2S state.

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.

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).

The Hague Codification Conference

1930 ◽  
Vol 24 (4) ◽  
pp. 674-693 ◽  
Author(s):  
Hunter Miller
Keyword(s):  
International Law ◽  
League Of Nations ◽  
International Conference ◽  
The Hague ◽  
Set Up

The Conference for the Codification of International Law which met at The Hague from March 13 to April 12, 1930, was the first international conference specifically called for that purpose.In 1924 the League of Nations set up a Committee of Experts for the progressive codification of international law. The task of that committee was to select and propose for the first conference on codification a certain number of subjects within the field of international law. Three subjects, namely, Nationality, Territorial Waters and The Responsibility of States for Damage Caused in Their Territory to the Person or Property of Foreigners, were finally agreed on as the subjects to be considered by the first conference.

scholarly journals 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.

2009 ◽  
Vol 87 (7) ◽  
pp. 773-783 ◽  
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.

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.

2011 ◽  
Vol 89 (1) ◽  
pp. 1-5 ◽  
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.

Recent Progress in The CdTe γ-Rays Detector Simulation

1993 ◽  
Vol 302 ◽  
Author(s):  
C. Manfredotti ◽  
F. Fizzotti ◽  
C. Ongaro ◽  
E. Vittone ◽  
U. Nastasi
Keyword(s):  
Recent Progress ◽  
Spectral Response ◽  
Monte Carlo Program ◽  
Experimental Conditions ◽  
Detailed Understanding ◽  
Practical Applications ◽  
Electronic Parameters ◽  
Γ Rays ◽  
Set Up ◽  
Detector Simulation

ABSTRACTRecently, we reported a simulation of spectroscopic performances of CdTe detectors by a Monte Carlo program ‘ISIDE’. The program was demonstrated to be extremely useful both for an exact simulation of the spectral response of CdTe to γy-rays and for a detailed understanding of the effect of physical and electronic parameters on the experimental performances. In the present work, the attention is focused on the various aspects of CdTe response to 57Co γ-rays, in an energy interval which is extremely interesting for practical applications of CdTe spectroscopy. Spectra are presented for different experimental conditions, particularly as far as electronics set up is concerned, in correlation with the relevant rise time distributions and with spatial distribution of interaction points in the detector. It is proved that in order to account for the rise times distributions as compared with the experimental ones, one must assume the presence of a dead region on the front of the detector. Moreover, a clear indication of what is needed in order to reach the best energy resolution in realistic conditions is given.

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