Special Issue "Positron Scattering and Annihilation with Atoms and Molecules including Emerging New Resonances and their Applications in other Systems"
A special issue of Atoms (ISSN 2218-2004).
Deadline for manuscript submissions: closed (31 January 2016)
Prof. Dr. Chi Yu Hu
Dr. Anand K. Bhatia
Heliophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
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Interests: scattering and annihilation of positrons and electrons; Feshbach resonances; Photoionization of atoms; muonic physics; Rydberg states; excitation of ions by electron and proton impact their applications to astrophysics; Photoionization; atomic structure calculations; Lamb shift
The low energy positron collisions and annihilation on atoms and molecules has had a long and very successful research record in both theoretical and experimental fronts. At energy above the positronium formation threshold, the progress was limited due to the inability to distinguish the direct positron annihilation from that due to positronium formation. This problem is solved beginning with the three-body scattering systems using the multi-channel Faddeev-Merkuriev equation (MFE). The complete solution of a six-open channel (S-partial wave) positron collision with hydrogen atom system provided detail information of the structures of resonances. Two types of resonances exist in this region. One type is identified as the well known Feshbach resonances. The second type has been identified to have a much different formation mechanism. It is named the Gailitis resonances. A series of Gailitis resonances occur when the incoming charged particle and the target atom with electric moments become correlated at certain distances via the internal Stark-effect. The life-time of these resonances can be very long when the center of mass collision energy is small. Such long-lived long range correlation can produce interesting physical effects. An earlier six-open channel, S-partial waves calculation showed enhanced anti-hydrogen formation cross section from the incoming channel anti-proton + positronium atom around the energy region of the Gailitis resonances. Recent theoretical calculation indicated the Gailitis resonance is able to provide an alternative route to muon catalyzed fusion. Low energy nuclear fusion can be explained when the condition for the formation of Gailitis resonance exists. The physical mechanism involved in the formation of Gailitis resonance is the universal Stark-effect. This Special Issue hopes to bring awareness of the Gailitis resonance to the larger physics communities. We invite authors to submit articles from all areas of physics.
Dr. Chiyu Hu
Dr. Anand K. Bhatia
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atoms is an international peer-reviewed open access quarterly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 350 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: The Faddeev-Merkuriev differential equations(MFE) and multichannel 3-body scattering systems
Authors: Chi Yu Hu and David Caballero
Affiliation: Department of Physics and Astronomy, California State University, Long Beach California, U.S.A.
Abstract: Numerical implementation of the MFE is presented in some details. The Faddeev Channel wave functions display unique properties of each and every open Channels respectively. In particular, near resonant energies, the structures of the resonances are beautifully displayed, from which, the life-time of the resonances can be determined simply using the uncertainty principle. The phase shift matrix, or the K-matrix provides unique information for each and every resonance. These information enable the identification of the physical formation mechanism of the Gailitis resonances. A few of theses resonances, previously known as the mysterious shape resonances, have occurred in a number of different collision systems. The Gailitis resonances are actually produced by a quantized Stark-effect within the various collision systems. Since Stark-effect is an universal phenomenon, the Gailitis resonances are expected to occur in much broader classes of collision systems. We will present the results of a precision calculation using the MFE method in sufficient details for interested students who wish to explore the mysteries of nature with a powerful theoretical tool.
Keywords: multichannel- quantum scattering theory, Stark-effect, resonance
Title: Second order Stark-effect induced Gailitis resonances in e + Ps(l=0) and p + 7Li
Authors: Chi Yu Hu , Z. Papp and David Caballero
Affiliation: Department of Physics and Astronomy, Long Beach, California, U.S.A
Abstract: We present detailed comparison between the first order Stark-effect induced Gailitis resonance in e+ + H(n=2) and the second order Stark-effect induced resonance in e + Ps(l=0). Common characteristics, as well as the differences, of these resonances will be identified. Assessment of the presence of Gailitis resonance in p + 7Li and the subsequent nuclear fusion between the proton and the nucleus of 7Li will be discussed.
Keywords: multichannel quantum scattering theory,Stark-effect, Gailitis resonance