The production of
            V
            -particles in low-energy interactions

The events described earlier showing the production of slow heavy mesons in photographic emulsions were interactions in which many shower particles were also produced. I should like to draw attention to three photographs which have been obtained in a cloud-chamber experiment carried out at the Jungfraujoch by a group from Manchester. These show the production of F-particles in interactions of very low multiplicity. In two of these events (Astbury, Chippindale, Millar, Newth, Page, Rytz & Sahiar 1952) slow-charged F-particles are produced in secondary interactions in a lead plate in the cloud chamber. The only other visible products of these interactions are one and two shower particles respectively. The third event is a star in the gas of the cloud chamber from which a neutral V -particle emerges. The total energy of the star is estimated as less than 1010 eV. This event is fully described by Astbury, Buchanan, James, Millar, Newth, Page, Rytz & Sahiar (1953).

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Realizing Stable High‐Performance and Low‐Energy‐Loss Ternary Photovoltaics through Judicious Selection of the Third Component

Solar RRL ◽

10.1002/solr.202100450 ◽

2021 ◽

pp. 2100450

Author(s):

Bing-Huang Jiang ◽

Yi-Peng Wang ◽

Yu-Wei Su ◽

Jia-Fu Chang ◽

Chu-Chen Chueh ◽

...

Keyword(s):

Energy Loss ◽

High Performance ◽

Low Energy ◽

The Third ◽

Selection Of

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Cloud-Chamber Observation on Low Energy PortionRaEBeta-Spectrum

Physical Review ◽

10.1103/physrev.74.699.3 ◽

1948 ◽

Vol 74 (6) ◽

pp. 699-700 ◽

Cited By ~ 3

Author(s):

Arthur Waltner ◽

F. T. Rogers

Keyword(s):

Cloud Chamber ◽

Low Energy

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Photoproduction of Gravitational Radiation in Static Electromagnetic Fields. Radiative Corrections

Canadian Journal of Physics ◽

10.1139/p75-279 ◽

1975 ◽

Vol 53 (20) ◽

pp. 2315-2320 ◽

Cited By ~ 3

Author(s):

G. Papini ◽

S. -R. Valluri

Keyword(s):

Cross Section ◽

Gravitational Radiation ◽

Low Energy ◽

Radiative Corrections ◽

Third Order ◽

The Third ◽

Relativistic Approximation ◽

Effective Lagrangian ◽

Charge Renormalization ◽

Made In

The radiative corrections of second and third order for the process of photoproduction of gravitons in Coulomb and magnetic dipole fields have been calculated.All divergences have been removed either by charge renormalization or regularization. No approximations have been made in the calculation of the second order cross section. In the third order calculation only the extreme relativistic approximation is given. The forms of the effective Lagrangian, corresponding to the low energy approximations have been determined.

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REFINEMENT OF THE ${\rm{Si}}(111) \mbox{-} (\surd{3} \times \surd{3}){\rm{R30}}^\circ - {\rm{Ag}}$ STRUCTURE BY LOW-ENERGY ELECTRON DIFFRACTION

Surface Review and Letters ◽

10.1142/s0218625x95000406 ◽

1995 ◽

Vol 02 (04) ◽

pp. 451-457 ◽

Cited By ~ 10

Author(s):

H. OVER ◽

S.Y. TONG ◽

J. QUINN ◽

F. JONA

Keyword(s):

Experimental Data ◽

Electron Diffraction ◽

Bond Length ◽

Debye Temperature ◽

Low Energy ◽

Energy Electron ◽

Data Set ◽

Low Energy Electron Diffraction ◽

The Third ◽

Low Energy Electron

We have reinvestigated the bond geometry of the [Formula: see text] surface by means of low-energy electron diffraction using a much larger experimental data set than that previously used. The [Formula: see text] surface consists of a [Formula: see text] lattice of Ag atoms which replaces the topmost Si atoms, and forces the remaining Si atoms to form trimers. The Ag-Ag bond length turned out to be 3.47±0.12 Å. The Ag atoms are laterally displaced from the bulk positions of the Si atoms which they have replaced by 0.53 Å resulting in a Ag-Si bond length of 2.36±0.17 Å. The missing top Si layer and the formation of Si trimers lead to strong distortions in deeper Si layers, most notably a buckling in the third and fourth Si layer with a magnitude of about 0.35 Å and 0.2 Å, respectively. Applying the concept of ‘split positions’, the low Debye temperature of Ag has been interpreted as being caused by strong in-plane (either static or dynamic) movements of the Ag atoms perpendicular to the Ag-Si bonding.

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Spontaneous Tunnel Transitions Induced by Redistribution of Trapped Electrons over Impurity Centers

Zeitschrift für Naturforschung A ◽

10.1515/zna-1983-0902 ◽

1983 ◽

Vol 38 (9) ◽

pp. 959-962

Author(s):

A. A. Berezin

Keyword(s):

Excited State ◽

Charge State ◽

Ground State ◽

Low Energy ◽

Energy Photon ◽

Impurity Site ◽

The Third ◽

Tunnel Transition ◽

Extra Electron ◽

Impurity Centers

Abstract A system of polyvalent impurity centers in a semiconductor (i.e. Au-centers in Si) is con-sidered. The ground state of the impurity pair Au-(a) + Au° (b), where an extra electron is localized on the site a, may be turned into an excited state due to a change of the charge state of a third nearby impurity site. This happens because of different shifts of the Au--level at sites a and b due to their different distances from the third center. As a result, the original pair is able to reach a new ground state Au° (a) + Au- (b) through a slow spontaneous tunnel transition. The probability of this transition, when it is accompanied by an emission of a low energy photon, is calculated explicitly.

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Observations on the Decay of Heavy Mesons in Photographic Emulsions

Resonance ◽

10.1007/s12045-019-0897-y ◽

2019 ◽

Vol 24 (11) ◽

pp. 1317-1345

Author(s):

Naba K. Mondal ◽

M. G. K. Menon ◽

C. O’Ceallaigh

Keyword(s):

Heavy Mesons ◽

Photographic Emulsions

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IDENTIFICATION OF OVARIAN FOLLICLES AT ESTRUS AND DEVELOPMENT OF THEIR ENSUING CORPORA LUTEA IN SINGLE AND MULTIPLE OVULATING EWES ON TWO FEEDING REGIMES

Canadian Journal of Animal Science ◽

10.4141/cjas77-083 ◽

1977 ◽

Vol 57 (4) ◽

pp. 647-652 ◽

Cited By ~ 5

Author(s):

J. J. DUFOUR ◽

P. MATTON

Keyword(s):

High Energy ◽

Ovarian Follicles ◽

Low Energy ◽

Ovulation Rate ◽

Corpora Lutea ◽

The Third ◽

India Ink ◽

Feeding Regimes

Twelve hours after standing estrus was first detected, 30 ewes had their four largest follicles identified and marked with India ink. Seven days later, ovulation rates and origin of the corpora lutea (CL) from previously marked follicles were determined. Feeding a high energy ration from day 10 to estrus did not change the ovulation rate as compared to feeding a low energy ration. Its only effect was to increase the diameter of the third and fourth largest follicles. The diameter of the largest follicle was identical in single and multiple ovulators. However, in multiple ovulators, the diameter of the second largest follicle was larger than in single ovulators. The largest follicle identified at estrus developed into a CL that was 15% heavier in single than in multiple ovulators. In multiple ovulators, the second largest follicle developed into a CL of weight similar to that from the largest follicle.

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EMISSION OF NUCLEI IN COSMIC RAY STARS

Canadian Journal of Research ◽

10.1139/cjr50a-051 ◽

1950 ◽

Vol 28a (6) ◽

pp. 616-627 ◽

Cited By ~ 2

Author(s):

E. Pickup ◽

L. Voyvodic

Keyword(s):

Excited State ◽

Energy Spectrum ◽

Radioactive Decay ◽

Cosmic Ray ◽

Cloud Chamber ◽

Photographic Emulsions ◽

Chamber Technique ◽

Good Agreement ◽

Α Particles

One of the more interesting features of cosmic ray stars is that [Formula: see text] nuclei are ejected occasionally in the nuclear disintegrations. Such nuclei are characterized by the fact that, at the end of their range, they suffer radioactive decay (τ = 0.9 sec.) into [Formula: see text], which immediately splits up into two oppositely directed α-particles, giving what is usually referred to as a hammer track. In this investigation numerous examples have been observed of the emission of such nuclei in stars in photographic emulsions, the stars having from 2 to 60 prongs. In particular, it has been shown that the energy spectrum of the α-particles forming the hammer tracks is in good agreement with that observed by other workers, and also with experiments made, using the cloud chamber technique, indicating that the [Formula: see text] in this disintegration is formed in the excited state. When an electron sensitive emulsion is used it is shown that the hammer track is accompanied by the [Formula: see text] disintegration electron. The energy spectrum of the [Formula: see text] nuclei is plotted, and the mechanism of the formation is discussed for both large and small stars.

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