Pion capture and hydrogen bonds in deuterated methanol

The probability of pion capture by hydrogen was measured for CH{sub 3}OH, CD{sub 3}OH, and CH{sub 3}OD as a function of temperature from {minus}150 to +250 {degree}C. The nuclear capture of a pion by a proton was identified using the pion charge-exchange reaction. The coincident photons from the {pi...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1991-08, Vol.44 (3), p.1725-1732
Hauptverfasser:	HORVATH, D, MEASDAY, D. F, ANIOL, K. A, ENTEZAMI, F, HASINOFF, M, NOBLE, A. J, STANISLAUS, S, VIRTUE, C. J, CLOUGH, A. S, SMITH, J. R. H, SALOMON, M
Format:	Artikel
Sprache:	eng
Schlagworte:	640303 - Atomic, Molecular & Chemical Physics- Positronium, Muonium, & Muonic & Mesic Atoms & Molecules ALCOHOLS Atomic and molecular collision processes and interactions ATOMIC AND MOLECULAR PHYSICS CAPTURE CHARGE EXCHANGE Charge transfer CHARGED-PARTICLE REACTIONS CHEMICAL REACTIONS DEUTERATION Exact sciences and technology HADRON REACTIONS HIGH TEMPERATURE HYDROXY COMPOUNDS MEASURING METHODS MESON REACTIONS METHANOL NUCLEAR REACTIONS ORGANIC COMPOUNDS Physics PION REACTIONS PROBABILITY
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Zusammenfassung:	The probability of pion capture by hydrogen was measured for CH{sub 3}OH, CD{sub 3}OH, and CH{sub 3}OD as a function of temperature from {minus}150 to +250 {degree}C. The nuclear capture of a pion by a proton was identified using the pion charge-exchange reaction. The coincident photons from the {pi}{sup 0} decay were detected by TRIUMF's large NaI spectrometers. We have found a relative difference of 1.79{plus minus}0.11 in the pion capture probability in solid and supercritical CD{sub 3}OH that is interpreted in terms of the hydrogen-bond-breaking model.
ISSN:	1050-2947 1094-1622
DOI:	10.1103/PhysRevA.44.1725