Target structure induced suppression of the ionization cross section for very low energy antiproton-hydrogen collisions.
Phys Rev Lett
; 105(21): 213201, 2010 Nov 19.
Article
in En
| MEDLINE
| ID: mdl-21231302
ABSTRACT
Low energy antiprotons have been used previously to give benchmark data for theories of atomic collisions. Here we present measurements of the cross section for single, nondissociative ionization of molecular hydrogen for impact of antiprotons with kinetic energies in the range 2-11 keV, i.e., in the velocity interval of 0.3-0.65 a.u. We find a cross section which is proportional to the projectile velocity, which is quite unlike the behavior of corresponding atomic cross sections, and which has never previously been observed experimentally.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2010
Type:
Article
Affiliation country:
Denmark