Physical characterization of neutron beams produced by protons and deuterons of various energies bombarding beryllium and lithium targets of several thicknesses

H. I. Amols, John F Dicello, M. Awschalom, L. Coulson, S. W. Johnsen, R. B. Theus

Research output: Contribution to journalArticle

Abstract

Protons of 35 and 65 MeV and deuterons of 35 MeV were used to bombard beryllium and lithium targets of various thicknesses. Four types of experiments were conducted in order to characterize the neutron fields. They were (1) central axis depth dose measurements in a water phantom, (2) dose buildup at small depths in tissue equivalent plastic, (3) microdosimetric measurements and LET distributions, and (4) neutron yields and energy spectra at an angle of 0 deg. The results generally show that (a) the central axis depth doses for the 35 and 65 MeV particles roughly approximate those of 60Co and 4 MeV bremsstrahlung photons, respectively, (b) the neutron dose buildups are more rapid than those of the above mentioned photon sources, (c) the microdosimetric spectra show differences which are consistent with the measured neutron energy spectra, and (d) p–Li compared to p–Be neutron spectra have larger high energy particle flux for similar target and beam configurations.

Original languageEnglish (US)
Pages (from-to)486-493
Number of pages8
JournalMedical Physics
Volume4
Issue number6
DOIs
StatePublished - 1977
Externally publishedYes

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Beryllium
Deuterium
Neutrons
Lithium
Protons
Photons
Linear Energy Transfer
Plastics
Water

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

Cite this

Physical characterization of neutron beams produced by protons and deuterons of various energies bombarding beryllium and lithium targets of several thicknesses. / Amols, H. I.; Dicello, John F; Awschalom, M.; Coulson, L.; Johnsen, S. W.; Theus, R. B.

In: Medical Physics, Vol. 4, No. 6, 1977, p. 486-493.

Research output: Contribution to journalArticle

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abstract = "Protons of 35 and 65 MeV and deuterons of 35 MeV were used to bombard beryllium and lithium targets of various thicknesses. Four types of experiments were conducted in order to characterize the neutron fields. They were (1) central axis depth dose measurements in a water phantom, (2) dose buildup at small depths in tissue equivalent plastic, (3) microdosimetric measurements and LET distributions, and (4) neutron yields and energy spectra at an angle of 0 deg. The results generally show that (a) the central axis depth doses for the 35 and 65 MeV particles roughly approximate those of 60Co and 4 MeV bremsstrahlung photons, respectively, (b) the neutron dose buildups are more rapid than those of the above mentioned photon sources, (c) the microdosimetric spectra show differences which are consistent with the measured neutron energy spectra, and (d) p–Li compared to p–Be neutron spectra have larger high energy particle flux for similar target and beam configurations.",
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AU - Dicello, John F

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AU - Coulson, L.

AU - Johnsen, S. W.

AU - Theus, R. B.

PY - 1977

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