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Record 1 of 25870
Formation of Triplet Positron-helium Bound State by Stripping of Positronium Atoms in Collision with Ground State Helium
Author and Affiliation:
Drachman, Richard J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Formation of triplet positron-helium bound state by stripping of positronium atoms in collision with ground state helium JOSEPH DI RlENZI, College of Notre Dame of Maryland, RICHARD J. DRACHMAN, NASA/Goddard Space Flight Center - The system consisting of a positron and a helium atom in the triplet state e(+)He(S-3)(sup e) was conjectured long ago to be stable [1]. Its stability has recently been established rigorously [2], and the values of the energies of dissociation into the ground states of Ps and He(+) have also been reported [3] and [4]. We have evaluated the cross-section for this system formed by radiative attachment of a positron in triplet He state and found it to be small [5]. The mechanism of production suggested here should result in a larger cross-section (of atomic size) which we are determining using the Born approximation with simplified initial and final wave functions.
Publication Date: Jan 01, 2006
Document ID:
20070015992
(Acquired Apr 30, 2007)
Subject Category: ATOMIC AND MOLECULAR PHYSICS
Document Type: Conference Paper
Meeting Information: DAMOP06; 16-20 May 2006; Knoxville, TN; United States
Meeting Sponsor: American Physical Society; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: GROUND STATE; HELIUM ATOMS; POSITRONS; ATOMIC COLLISIONS; ATOMIC ENERGY LEVELS; BORN APPROXIMATION; STABILITY; WAVE FUNCTIONS; CROSS SECTIONS
Availability Source: Other Sources
Availability Notes: Abstract Only
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