SU-FF-T-82: Angular Distribution of Photon Energy Spectra Emitted by Low-Energy Interstitial Brachytherapy Sources

ABSTRACTThe constructive interference between direct and indirect channels above the absorption threshold of a core level leads to a massive increase in the emission cross section leading to a phenomenon called “resonant photoemission”. Using novel magnetic linear dichroism in angular distribution photoelectron spectroscopy experiment we have tried to understand the nature of the resonant photoemission process in Gd metal. The presence of dichroism in Gd 4f photoemission intensity at a photon energy corresponding to resonant photoemission clearly demonstrates the photoemission-like nature of the resonant photoemission process.

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THE ANGULAR DISTRIBUTION OF PHOTOFISSION FRAGMENTS

Canadian Journal of Physics ◽

10.1139/p59-163 ◽

1959 ◽

Vol 37 (12) ◽

pp. 1418-1437 ◽

Cited By ~ 22

Author(s):

A. P. Baerg ◽

R. M. Bartholomew ◽

F. Brown ◽

L. Katz ◽

S. B. Kowalski

Keyword(s):

Angular Distribution ◽

Low Energy ◽

Photon Beam ◽

Angular Distributions ◽

Bremsstrahlung Energy ◽

Isotropic Distribution ◽

Degree Of Anisotropy ◽

Maximum Bremsstrahlung Energy

Angular distributions of photofission fragments relative to the photon beam have been measured as a function of maximum bremsstrahlung energy in the range 6–20 Mev. The nuclides U-233, U-235, Np-237, Pu-239, and Am-241 give an isotropic distribution at all energies studied. The nuclides Th-232, U-234, U-236, U-238, and Pu-240 give anisotropic distributions which can be described by an equation of the form W(θ) = 1 + α sin2 θ where θ is the angle between fragment and beam. The degree of anisotropy is large at low energy and falls rapidly as the energy is increased. At a given energy Th-232 has the greatest degree of anisotropy and Pu-240 the least.

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Estimation of Photon Energy Spectra of 60Co in Water Using CaF2:Mn and Fricke Dosemeters

Radiation Protection Dosimetry ◽

10.1093/oxfordjournals.rpd.a031735 ◽

1996 ◽

Vol 66 (1) ◽

pp. 283-288 ◽

Cited By ~ 2

Author(s):

S. Miljanic ◽

M. Ranogajec-Komor

Keyword(s):

Photon Energy ◽

Energy Spectra

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Angular distribution of the target asymmetry on polarized protons for the reaction γp↑ → π+n at a photon energy of 700 MeV

Physics Letters B ◽

10.1016/0370-2693(76)90479-2 ◽

1976 ◽

Vol 63 (1) ◽

pp. 107-110 ◽

Cited By ~ 14

Author(s):

K.H. Althoff ◽

R. Conrad ◽

M. Gies ◽

H. Herr ◽

V. Kadansky ◽

...

Keyword(s):

Angular Distribution ◽

Photon Energy ◽

Polarized Protons ◽

Target Asymmetry

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Photon energy spectra in the vicinity of nuclear reactors.

Japanese Journal of Health Physics ◽

10.5453/jhps.13.183 ◽

1978 ◽

Vol 13 (3) ◽

pp. 183-191 ◽

Cited By ~ 1

Author(s):

Yoshiyuki NAKASHIMA ◽

Kousuke KATSURAYAMA ◽

Tadashi TSUJIMOTO ◽

Susumu MINATO

Keyword(s):

Photon Energy ◽

Nuclear Reactors ◽

Energy Spectra

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p-Wave Strength in the Low-energy 7Li(p,?0)8Be Cross Section

Australian Journal of Physics ◽

10.1071/ph950813 ◽

1995 ◽

Vol 48 (5) ◽

pp. 813 ◽

Cited By ~ 9

Author(s):

FC Barker

Keyword(s):

Angular Distribution ◽

Shell Model ◽

Cross Section ◽

Low Energy ◽

P Wave ◽

Model Calculations ◽

Energy Data

Recent fits to low-energy 7Li(p, "Yo)8Be angular distribution and analysing power data suggested a large p-wave strength. It is shown that acceptable fits to the data can be obtained by attributing the p-wave Ml contributions to the tails of the 17 �64 and 18 �15 MeV 1+ levels of 8Be, with p-wave strengths much less than those obtained previously, but only if some of the spectroscopic amplitudes have signs opposite to those suggested by shell model calculations and/or a fit to higher-energy data.

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