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Titolo:
Excitation of the Q(1) (1)Sigma(+)(g) doubly excited state of H-2 by electron impact
Autore:
Edwards, AK; Zheng, Q;
Indirizzi:
Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Dept Phys & Astron, Athens, GA 30602 USA Indian River Community Coll, Dept Nat Sci, Ft Pierce, FL 34981 USA Indian River Community Coll Ft Pierce FL USA 34981 t Pierce, FL 34981 USA
Titolo Testata:
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
fascicolo: 8, volume: 34, anno: 2001,
pagine: 1539 - 1548
SICI:
0953-4075(20010428)34:8<1539:EOTQ(D>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESONANT DISSOCIATIVE PHOTOIONIZATION; ENERGY-LOSS SPECTROSCOPY; MOLECULAR-HYDROGEN; AUTOIONIZING STATES; SUPEREXCITED STATE; IONIZATION; DEUTERIUM; D-2; PHOTODISSOCIATION; ALIGNMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Edwards, AK Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Astron, Athens, GA 30602 USA
Citazione:
A.K. Edwards e Q. Zheng, "Excitation of the Q(1) (1)Sigma(+)(g) doubly excited state of H-2 by electron impact", J PHYS B, 34(8), 2001, pp. 1539-1548

Abstract

400 eV electrons were used to excite the autoionizing state Q(1)(1)Sigma ()(g) of H-2. The relative cross section was measured as a function of: (1)the angle between the internuclear axis and the momentum transfer vector of the collision; and (2) energy loss for a fixed orientation of the molecular axis in the laboratory frame. In the first set of measurements electronsscattered at 18 degrees with an energy loss of 29 eV were detected in coincidence with a 2 eV H+ ion resulting from dissociation following autoionization. The angular distribution of the 2 eV ions was recorded and fitted to calculated values. A maximum was found when the internuclear axis was aligned with the momentum transfer vector. Secondly, the relative yield of 2 eV H+ ions was measured as a function of energy loss in the electron-H-2 collisions. Energy loss ranged from 23 to 35 eV. The lowest lying Q(1)(1)Sigma ()(g), (1)Sigma (+)(u) and (1)Pi (g) were included in the calculated fit tothe data.

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Documento generato il 27/09/20 alle ore 20:20:16