α-Particle induced radical production in anthracene beyond the Bragg peak

H. T. Hu, S. Arnold, M. Pope

Research output: Contribution to journalArticle

Abstract

Triplet excitons are used as a sensitive probe for the spatial distribution of paramagnetic defects (exciton sounding). Following α-particle (12-30 MeV) bombardment of an anthracene crystal, a remarkably long tail (supertail) of paramagnetic defects (free radicals) was found, extending into the crystal for a distance of about six times that of the Bragg peak. Evidence is presented that of all possible mechanisms for this supertail, only recoil protons can account quantitatively for the observed spatial distribution. A model calculation indicates that the proton-induced radical yield is about five times that for α particles. The limitations of this model are discussed.

Original languageEnglish (US)
Pages (from-to)231-239
Number of pages9
JournalRadiation Research
Volume74
Issue number2
StatePublished - 1978

Fingerprint

anthracene
protons
crystals
Protons
spatial distribution
excitons
recoil protons
defects
sounding
free radicals
Free Radicals
bombardment
tail
probes
anthracenes
LDS 751

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Biophysics
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

α-Particle induced radical production in anthracene beyond the Bragg peak. / Hu, H. T.; Arnold, S.; Pope, M.

In: Radiation Research, Vol. 74, No. 2, 1978, p. 231-239.

Research output: Contribution to journalArticle

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