Is there resonance enhancement of the cross section in very low energy collision‐induced vibrational relaxation?

1984 ◽  
Vol 81 (12) ◽  
pp. 5737-5742 ◽  
Author(s):  
W. Ronald Gentry
Keyword(s):  
Cross Section ◽  
Vibrational Relaxation ◽  
Low Energy ◽  
Energy Collision ◽  
Resonance Enhancement ◽  
The Cross

Vibrational relaxation induced by very low energy collisions in the S1(1B2u) state of naphthalene: a search for resonance enhancement of the cross section

1988 ◽  
Vol 92 (13) ◽  
pp. 3751-3760 ◽  
Author(s):  
Desmond J. Muller ◽  
Ruth I. McKay ◽  
Geoffrey B. Edwards ◽  
Warren D. Lawrance ◽  
Judith P. Hardy ◽  
...  
Keyword(s):  
Cross Section ◽  
Vibrational Relaxation ◽  
Low Energy ◽  
Resonance Enhancement ◽  
The Cross

Is there resonance enhancement of the cross section for vibrational relaxation induced by very low energy collisions? The I2–He system revisited

1988 ◽  
Vol 89 (11) ◽  
pp. 6777-6784 ◽  
Author(s):  
Andrew B. Rock ◽  
Carol M. Van Zoeren ◽  
Scott H. Kable ◽  
Geoffrey B. Edwards ◽  
Alan E. W. Knight
Keyword(s):  
Cross Section ◽  
Vibrational Relaxation ◽  
Low Energy ◽  
Resonance Enhancement ◽  
The Cross

Formation of dtμ in muon-catalysed fusion: a resonant rearrangement process

1996 ◽  
Vol 74 (7-8) ◽  
pp. 401-406 ◽  
Author(s):  
E. A. G. Armour
Keyword(s):  
Cross Section ◽  
Formation Rate ◽  
Low Energy ◽  
Energy Collision ◽  
Scattering Process ◽  
New Approach ◽  
Coupled Equations ◽  
Rearrangement Process ◽  
The Cross

A key process in the muon-catalysed fusion cycle is a low-energy collision of a tμ atom with a DA molecule, where A is H, D, or T, which leads at appropriate incident energies, to the formation of a resonant complex containing dtμ. In this paper, methods of calculating the resonant formation rate of dtμ are discussed. A description is given of a new approach that makes use of coupled equations for the rearrangement scattering process and elements of Feshbach's theory of resonances to obtain an expression for the cross section for resonant dtμ formation. The insights gained from this approach are discussed.

Experiments on the reaction T( d , n ) 4 He I. The 90° cross-section

1951 ◽  
Vol 204 (1079) ◽  
pp. 488-499 ◽  
Keyword(s):  
Cross Section ◽  
Heavy Water ◽  
Incident Beam ◽  
Absolute Magnitude ◽  
Alpha Particles ◽  
Low Energy ◽  
Energy Relation ◽  
Conventional Theory ◽  
Simultaneous Observation ◽  
The Cross

The 90° cross-section of the reaction 3 1 H( d , n ) 4 2 He has been investigated over the energy range 100 to 200 keV (energy of bombarding triton) using the 200 keV accelerating set of the establishment. Two methods have been used. As a preliminary experiment the yield of alpha-particles from a thick heavy-ice target was measured per unit charge of incident beam, as a function of deuteron energy, and the variation of cross-section deduced from the gradient of this excitation curve and the range energy relation for tritons in heavy water. Secondly, a comparison was made between the yield of alpha-particles from the D-T reaction and the yield of protons from the D-D reaction when a beam containing both deuterons and tritons was passed through a heavy-water vapour target. (The energy loss in this target was calculated as only a few hundred electron volts.) To do this a simultaneous observation was made of the protons and alpha-particles using the same counter. The values obtained for the cross-section have been compared with the resonance formulae given by Bretscher & French (1949) and by Tascbek, Everhart, Gittings, Hemmendinger & Jarvis (1948) and have been found to be in disagreement with formulae of this type. From considerations of the absolute magnitude of the cross-section it has been deduced that no conventional theory postulating reaction at a distance equal to the sum of the nuclear radii (cf. Konopinski & Teller 1948) will be able to explain this reaction. The evidence for a low-energy resonance (Allan & Poole 1949) is thought to be inconclusive.

Reaction cross section for incorporation of ND3 into NH4+(NH3)n−1 (n=3–9) at very low energy collision

2000 ◽  
Vol 113 (18) ◽  
pp. 8026-8035 ◽  
Author(s):  
Takaaki Orii ◽  
Yoshiki Okada ◽  
Kazuo Takeuchi ◽  
Masahiko Ichihashi ◽  
Tamotsu Kondow
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Low Energy ◽  
Energy Collision

scholarly journals Very Low Energy Collision Induced Vibrational Relaxation: An Overview

1983 ◽  
Vol 2 (3-4) ◽  
pp. 137-166 ◽  
Author(s):  
Stuart A. Rice ◽  
Charles Cerjan
Keyword(s):  
Vibrational Relaxation ◽  
Polyatomic Molecules ◽  
Low Energy ◽  
Quantum Mechanical ◽  
Theoretical Studies ◽  
The Novel ◽  
Energy Collision ◽  
Quantum Mechanical Treatment ◽  
Experimental And Theoretical Studies ◽  
Full Quantum

Recent experimental and theoretical studies of very low energy collision induced vibrational relaxation in diatomic and polyatomic molecules are surveyed. Emphasis is placed on the novel features of the very low energy process; these require a full quantum mechanical treatment of the collision to account for the observations.

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