Results 251 to 260 of about 75,517 (292)

Topaz-on neutron irradiation

The International Journal of Applied Radiation and Isotopes, 1981
Abstract Topaz single crystals, on neutron irradiation, change their colour to pale pink, pink and reddish pink, as the duration of irradiation increases. The hardness of the irradiated crystal increases with the increase in the total dosage. The increase in hardness caused due to irradiation is reduced to a considerable extent by heat treatment ...
openaire   +1 more source

Paramagnetic defects in neutron-irradiated GaP

Journal of Applied Physics, 1992
Aiming at a better understanding of intrinsic defects in III-V compounds, we reinvestigate fast-neutron-irradiated GaP. The surprising result is the observation of a similar spectrum, formerly ascribed to Asi-related defects in GaAs. Annealing experiments suggest this spectrum involves an impurity, probably boron.
Benchiguer, T., Goltzene, A., Mari, B., Schwab, C.   +3 more
openaire   +2 more sources

Neutron flux distribution in the irradiation channels of Am–Be neutron source irradiation facility

Annals of Nuclear Energy, 2011
Abstract Monte Carlo (MCNP-5) simulations of the neutron fluxes were performed to determine the radial and axial neutron fluxes of the two irradiation sites of the 20 Ci 241 Am–Be neutron irradiation facility at NNRI. The geometry of the 241 Am–Be source as well as the irradiator design, constituted one cylindrical neutron source at the center of a
M. Asamoah, B.J.B. Nyarko, J.J. Fletcher, R.B.M. Sogbadji, S. Yamoah, S.E. Agbemava, E. Mensimah   +6 more
openaire   +1 more source

Amorphization of solids irradiated by fast neutrons

Physica B: Condensed Matter, 2000
The diffraction patterns of amorphous solids produced by both a conventional technique and fast neutron irradiation were systematized. The diffraction patterns of the substances of these classes differ essentially. It was first ever shown that neutron radiation modified solids belong to the group of amrophous substances of a distortion type.
VD Parkhomenko, SF Dubinin, SG Teploukhov, BN Goshchitskii   +3 more
openaire   +1 more source

Neutron-Irradiated Enamel in Dissolution Studies

Journal of Dental Research, 1966
SYNOPSIS IN INTERLINGUA ADAMANTE IRRADIATE CON NEUTRONES IN STUDIOS DE DISSOLUTION.—Le rationes pro le non-uniformitate del reductiones producite per bombardmentso neutronic in le solubilitate acidic de intacte superficies de adamante esseva investigate in varie preparatos adamantin sub le conditiones de varie sequentias de solubitate con le uso de ...
T W, Cutress, W B, Healy, H, Allison
openaire   +2 more sources

The dosimetry of bone irradiated by fast neutrons

Physics in Medicine and Biology, 1986
The previous work on the dosimetry of bone is briefly reviewed. A dosimetric theory for the response of detectors irradiated by fast neutrons is applied to the problem of bone dosimetry. In the theory the detector or cavity shape is characterised by distributions of chord lengths along which the neutron-produced charged particles travel and deposit ...
A, Montelius, T E, Burlin
openaire   +2 more sources

Neutron Irradiation of Human Melanoma Cells

Pigment Cell Research, 1989
The biological characteristics and in vitro radiosensitivity of melanoma cells to thermal neutrons were investigated as a guide to the effectiveness of boron neutron capture therapy. Plateau phase cultures of three human malignant melanoma‐established cell lines were examined for cell density at confluence, doubling time, cell cycle parameters ...
K, Brown, M H, Mountford, B J, Allen, Y, Mishima, M, Ichihashi, P, Parsons   +5 more
openaire   +2 more sources

Irradiation embrittlement of neutron-irradiated ferritic steel

Journal of Nuclear Materials, 1985
Abstract In this study three kinds of Fe-Cr ferritic steels were examined by the instrumented Charpy test and tensile test before and after JMTR irradiation ( 2.2×10 23 f.n./m 2 ). In the unirradiated samples, 100%-martensite 5Cr-2Mo steel showed the highest adsorbed energy and the highest toughness at low temperatures, follewed by ...
H. Kayano, M. Narui, S. Ohta, S. Morozumi   +3 more
openaire   +1 more source

Post-irradiation annealing of neutron irradiated CuCrZr

Journal of Nuclear Materials, 2002
The effect of post-irradiation annealing at 300 °C for 50 h on the microstructure and mechanical properties of CuCrZr irradiated to 0.2 and 0.3 dpa at 100 °C has been evaluated. The post-irradiation annealing removes the yield point phenomenon, lowers the strength and improves the ductility and work hardening of the material.
Edwards, DJ, Singh, BN, Xu, Q, Toft, P
openaire   +1 more source

Positron lifetimes for neutron-irradiated C $_{60}$

Applied Physics A: Materials Science & Processing, 1995
The neutron-irradiation effects on C60 fullerite powder were studied by positron lifetime spectroscopy. Below 0.5 ns, a single lifetime of 382±1 ps was found for the unirradiated annealed sample and two components were resolved after neutron irradiation with a dose of 2×1016 n/cm2. Possible origins of these components are briefly discussed.
F. Bečvář, I. Novotný, I. Procházka, D. Rafaja, J. Kern   +4 more
openaire   +1 more source