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DESORPTION YIELDS USING keV POLYATOMIC PROJECTILES
Blain M., Della-Negra S., Joret H., Le Beyec Y., Schweikert E.
in Journal de Physique Colloques - International Workshop on MeV and KeV Ions and Cluster Interactions with Surfaces and Materials 2, Orsay : France (1988) - http://hal.archives-ouvertes.fr/jpa-00229423
Physique/Articles anciens
Physique/Physique Nucléaire Expérimentale
DESORPTION YIELDS USING keV POLYATOMIC PROJECTILES
M. Blain, S. Della-Negra1, H. Joret1, Y. Le Beyec1, E. Schweikert
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
http://ipnweb.in2p3.fr
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
France
We have studied the negative secondary ion emission from solid organic targets bombarded by molecular ions and cluster ions. As an example we present here the results obtained with the compound phenylalanine. We have used organic projectiles of mass 73 [Si (CH3)+], 147[Si(CH3)3 OSi(CH3)2+], 300 [molecular ion of coronene C24H12]+, 598 [coronene dimer 2(M-H)]+, and atomic and polyatomic ions of mass 133 [Cs]+, 393 [Cs2I]+, 653 [Cs3I2]+. These primary ions have been produced in the bombardment of targets of coronene and CsI by fission fragment from a 252Cf source. They were accelerated and focussed on the sample target. Sophisticated time of flight measurements of the primary and secondary ions have been performed with a special data acquisition system. All the time of flight mass spectra were recorded at one. The secondary molecular ion yield of the phenilalanine (M-H)- = 164 has been studied as a function of the energy of impact and of the mass of the projectile. A large enhancement of the yield with the mass and the energy is observed.
Anglais
1989

Journal de Physique Colloques
Journal de Physique Colloques
non spécifiée
Communications avec actes
1989
50
C2
C2-147-C2-153

International Workshop on MeV and KeV Ions and Cluster Interactions with Surfaces and Materials 2
1988
Orsay
France

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