منابع مشابه
Experimental comparison of thermal neutron absorption cross section in nano and micro particles
The neutron collision cross-section is important in neutron use for a specific job, such as neutron therapy or even in nuclear reactors. In calculating computational codes such as MCNP, only information from the neutron-to-mass collision information contained in the computational code library is used, in the case of nanoscale particles in contrast to the mass of materials and / or particulate m...
متن کاملRegolith Exposure of Lunar Meteorites Based on Neutron Capture Induced Shifts in Samarium Isotopic Composition
Introduction. Most lunar meteorites have unique cosmic-ray exposure (CRE) histories with long exposure times on the Moon, followed by very short transfer times from the Moon to Earth, typically 10-10 yr. Due to these short transfer times of lunar meteorites in space, the inventories of most cosmogenic radionuclides with half-lives of 10-10 yr contain contributions from exposure in the lunar reg...
متن کاملNeutron Activated Samarium-153 Microparticles for Transarterial Radioembolization of Liver Tumour with Post-Procedure Imaging Capabilities
INTRODUCTION Samarium-153 (153Sm) styrene divinylbenzene microparticles were developed as a surrogate for Yttrium-90 (90Y) microspheres in liver radioembolization therapy. Unlike the pure beta emitter 90Y, 153Sm possess both therapeutic beta and diagnostic gamma radiations, making it possible for post-procedure imaging following therapy. METHODS The microparticles were prepared using commerci...
متن کاملPhoton Absorption on a Neutron - Proton pair in
We have developed a phenomenological quasi-deuteron model to describe photodisintegration reactions of He and He at intermediate photon energies, and compared the results with experimental data obtained by TAGX group in which contributions from photon absorption by pn pair were selectively observed. The data can be reproduced reasonably well, however there still remain certain discrepancies bet...
متن کاملSalute to samarium.
Many years ago while studying for a degree in mineralogy, I was privileged to visit the Russian Ilmen Mountains, host to two minerals from which several rare-earth elements were discovered — monazite ((Ce, La, Nd, Th)PO4), and another mineral that was first described in 1839 by the German mineralogist Gustav Rose. He found uranium and tantalum in its composition and thus proposed the name urano...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1948
ISSN: 0031-899X
DOI: 10.1103/physrev.74.505