Neutron bombardment of single wall carbon nanohorn (SWCNH): DSC determination of the stored Wigner-Szilard energy

DOI
10.1007/s10967-013-2893-0
Cataldo, F.; Iglesias-Groth, S.; Hafez, Y.,; Angelini, G.
Referencia bibliográfica

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, Volume: 299, Issue: 3, Pages 1955-1963

Fecha de publicación:
3
2014
Número de autores
4
Número de autores del IAC
1
Número de citas referidas
0
Descripción
Single wall carbon nanohorn (SWCNH) were neutron-bombarded to a dose of 3.28 x 10(16) n/cm(2). The Wigner or stored energy was determined by a differential scanning calorimeter and was found 5.49 J/g, 50 times higher than the Wigner energy measured on graphite flakes treated at the same neutron dose. The activation energy for the thermal annealing of the accumulated radiation damage in SWCNH was determined in the range 6.3-6.6 eV against a typical activation energy for the annealing of the radiation-damaged graphite which is in the range of 1.4-1.5 eV. Furthermore the stored energy in neutron-damaged SWCNH is released at 400-430 degrees C while the main peak in the neutron-damaged graphite occurs at 200-220 degrees C. The radiation damaged SWCNH were examined with FT-IR spectroscopy showing the formation of acetylenic and aliphatic moieties suggesting the aromatic C=C breakdown caused by the neutron bombardment.
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Anisotropía del Fondo Cósmico de Microondas
El objetivo general de este proyecto es determinar y estudiar las variaciones espaciales y espectrales en la temperatura del Fondo Cósmico de Microondas y en su Polarización en un amplio rango de escalas angulares que van desde pocos minutos de arco hasta varios grados. Las fluctuaciones primordiales en la densidad de materia, que dieron origen a
Rafael
Rebolo López
En ejecución
Tipo
Con árbitro
Cosmología y Astropartículas (CYA)

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