Variation of the binary encounter peak energy as a function of projectile atomic number

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:200408

Sanders, J M ^[1]

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1. Oak Ridge National Lab., TN (United States)

The energy of the binary encounter peak, in spectra of electrons emitted at 0{degrees} with respect to the projectile beam direction, has been studied to investigate its dependence on the atomic number of the projectile ion. The projectiles all had the same squared velocity of 0.6 MeV/u, and all had the same charge q=7. The Z of the projectiles ranged from 8 to 35, and the target was H{sub 2}. The Energy E{sub BEP} of the binary encounter peak and also the energy t of the cusp formed by electron loss or electron capture to the projectile continuum (ELC or ECC) were obtained from fits to the spectra. Considerable care was required in fitting the cusp in order to properly ascertain the cusp energy. The energy shift {Delta}E, defined as the difference between 4t and E{sub BEP}, was obtained for each projectile. It is found that the energy shift decreases as the projectile Z increases. This trend is the opposite of that seen for projectile charge where the shift increases as q increases. Such a trend is not well described by the simple elastic scattering model of binary encounter electron production.

• OSTI ID: 200408
• Report Number(s): CONF-941129--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BINARY ENCOUNTER METHOD
ELECTRON EMISSION
HYDROGEN
ION-ATOM COLLISIONS