Conductance spectroscopy of a correlated superconductor in a magnetic field in the Pauli limit: Evidence for strong correlations

Protons of mean energy 650 MeV from the Birmingham proton synchrotron have been passed through a hydrogen-filled diffusion cloud chamber located in a pulsed magnetic field, and a total of 317 interactions observed. Of these, 205 were elastic collisions and the remaining 112 involved the production of π + -and π °-mesons in the ratio 4.3 to 1. The elastic/inelastic ratio and the π +/ π ° ratio agree with those obtained elsewhere; so also does the angular distribution of the elastically scattered protons, though the present experiment includes angles smaller than those covered in previous work. The elastic scattering is discussed in terms of the optical model of the nucleus and involves a radius of interaction of about 0.8 x 10 -13 cm. Of events of the type p + p → n + p + π + , 53 were analyzed in detail and strong correlations were found between the directions of the proton and the meson, and of the proton and the neutron. These correlations, and the π + / π 0 ratio, are consistent with an hypothesis due to Peaslee that at high energies such reactions proceed through an intermediate state of isotopic spin I = 3/2, involving the formation of an ‘excited nucleon’ which subsequently decays into a proton and a π + -meson. The Q -value distributions for pairs of secondary particles in the above reaction also support this hypothesis.

Download Full-text

Direct monitoring of erythrocytes aggregation under the effect of the low-intensity magnetic field by measuring light transmission at wavelength 800 nm

Polish Journal of Medical Physics and Engineering ◽

10.1515/pjmpe-2017-0015 ◽

2017 ◽

Vol 23 (4) ◽

pp. 89-92

Author(s):

Mohamed A. Elblbesy

Keyword(s):

Magnetic Field ◽

Static Magnetic Field ◽

Time Course ◽

Light Transmission ◽

Strong Correlations ◽

Simple Method ◽

Electrical And Magnetic Properties ◽

Living Organisms ◽

Intensity Magnetic Field ◽

The Magnetic Field

Abstract Interacting electromagnetic field with the living organisms and cells became of the great interest in the last decade. Erythrocytes are the most common types of the blood cells and have unique rheological, electrical, and magnetic properties. Aggregation is one of the important characteristics of the erythrocytes which has a great impact in some clinical cases. The present study introduces a simple method to monitor the effect of static magnetic field on erythrocytes aggregation using light transmission. Features were extracted from the time course curve of the light transmission through the whole blood under different intensities of the magnetic field. The findings of this research showed that static magnetic field could influence the size and the rate of erythrocytes aggregation. The strong correlations confirmed these results between the static magnetic field intensity and both the time of aggregation and sedimentation of erythrocytes. From this study, it can be concluded that static magnetic field can be used to modify the mechanisms of erythrocytes aggregation.

Download Full-text

ELECTRON-VORTEX INTERACTION IN A QUANTUM DOT

International Journal of Modern Physics B ◽

10.1142/s0217979204027177 ◽

2004 ◽

Vol 18 (27n29) ◽

pp. 3633-3636

Author(s):

M. B. TAVERNIER ◽

E. ANISIMOVAS ◽

F. M. PEETERS

Keyword(s):

Magnetic Field ◽

Wave Function ◽

Exact Diagonalization ◽

Wave Functions ◽

Perpendicular Magnetic Field ◽

Two Dimensional ◽

Vortex Interaction ◽

Strong Correlations ◽

Parabolic Potential ◽

Interacting Electrons

Small numbers N<5 of two-dimensional Coulomb-interacting electrons trapped in a parabolic potential placed in a perpendicular magnetic field are investigated. The reduced wave function of this system, which is obtained by fixing the positions of N-1 electrons, exhibits strong correlations between the electrons and the zeros. These zeros are often called vortices. An exact-diagonalization scheme is used to obtain the wave functions and the results are compared with results obtained from the recently proposed rotating electron molecule (REM) theory. We find that the vortices gather around the fixed electrons and repel each other, which is to a much lesser extend so for the REM results.

Download Full-text

Magnetic-field strengths from optical polarization data

Symposium - International Astronomical Union ◽

10.1017/s0074180900101263 ◽

1967 ◽

Vol 31 ◽

pp. 381-383

Author(s):

J. M. Greenberg

Keyword(s):

Magnetic Field ◽

Optical Polarization ◽

Polarization Data ◽

Term Model ◽

Source Of Information ◽

Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

Download Full-text

Observing the galactic magnetic field

Symposium - International Astronomical Union ◽

10.1017/s0074180900101251 ◽

1967 ◽

Vol 31 ◽

pp. 375-380

Author(s):

H. C. van de Hulst

Keyword(s):

Magnetic Field ◽

Fair Agreement ◽

Solar Neighbourhood ◽

Galactic Magnetic Field ◽

The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

Download Full-text

Structure in the radiation of the galactic disk

Symposium - International Astronomical Union ◽

10.1017/s0074180900101184 ◽

1967 ◽

Vol 31 ◽

pp. 355-356

Author(s):

R. D. Davies

Keyword(s):

Magnetic Field ◽

Galactic Disk ◽

Galactic Magnetic Field ◽

Measured Polarization

Observations at various frequencies between 136 and 1400 MHz indicate a considerable amount of structure in the galactic disk. This result appears consistent both with measured polarization percentages and with considerations of the strength of the galactic magnetic field.

Download Full-text

Interrelationships of factors of social development are more complex than Life History Theory predicts

Behavioral and Brain Sciences ◽

10.1017/s0140525x19000177 ◽

2019 ◽

Vol 42 ◽

Author(s):

Boris Kotchoubey

Keyword(s):

Life History ◽

Social Development ◽

Life History Theory ◽

Strong Correlations ◽

Behavioral Features

Abstract Life History Theory (LHT) predicts a monotonous relationship between affluence and the rate of innovations and strong correlations within a cluster of behavioral features. Although both predictions can be true in specific cases, they are incorrect in general. Therefore, the author's explanations may be right, but they do not prove LHT and cannot be generalized to other apparently similar processes.

Download Full-text

Calculated Coronal Magnetic Fields and Their Comparison with the Coronal Structures as Observed during Five Solar Eclipses

International Astronomical Union Colloquium ◽

10.1017/s0252921100026038 ◽

1994 ◽

Vol 144 ◽

pp. 559-564

Author(s):

P. Ambrož ◽

J. Sýkora

Keyword(s):

Magnetic Field ◽

Solar Cycle ◽

Magnetic Fields ◽

Solar Corona ◽

Coronal Magnetic Field ◽

Coronal Magnetic Fields ◽

Solar Eclipses ◽

Coronal Structures

AbstractWe were successful in observing the solar corona during five solar eclipses (1973-1991). For the eclipse days the coronal magnetic field was calculated by extrapolation from the photosphere. Comparison of the observed and calculated coronal structures is carried out and some peculiarities of this comparison, related to the different phases of the solar cycle, are presented.

Download Full-text