منابع مشابه
Energy Spectrum of Fast Neutrons Produced by 130 MeV Protons in Water
In proton radiation therapy nuclear reactions of highenergy protons hitting beam line components (e.g. collimators or other beam shaping devices) lead to the production of secondary neutrons which may result in significant neutron dose equivalent values (typically of the order of mSv per treatment Gy), depending on the treatment techniques [1]. For scanning devices the neutron dose contribution...
متن کاملTrabecular bone changes induced by fast neutrons versus gamma rays in mice
Background: The trabecular bone changes in the tibia of C3H/HeN mice were measured 12 weeks after whole body irradiation with various doses of fast neutrons (0-2.4 Gy) or 137Cs-generated gamma-rays (0-6 Gy). Materials and Methods: Serum calcium, phosphorus, estradiol concentration and alkaline phosphatase activity were measured. Tibiae were anal...
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Results are presented from the exposure of a CMS performance prototype MSGC to a fast neutron beam having an average energy of 20 MeV and an intensity of 7 106 neutrons/mm2/s. A fluence equivalent to 3 years of LHC operation has been accumulated without damages to the detector. The stability of the MSGC operation in a heavily ionising particle flux is reported and the estimation of their produc...
متن کاملNuclear Reaction Studies with Exotic Boron Beams
Spectroscopic investigation, on exotic nuclei, performed in two different experiments with secondary radioactive boron beams are discussed. Spectroscopic factors for the B+n bound-states are obtained by measuring momentum distribution of the B residual nucleus from knockout reaction of the B beam at intermediate energy. The momentum distributions are measured in coincidence with the emited γ-ra...
متن کاملExotic Ion-beams, Targets and Sources
Exotic beams of short-lived radioisotopes are produced in nuclear reactions such as thermal neutron induced fission, target or projectile fragmentation and fusion reactions. For a given radioactive ion beam (RIB), different production modes are in competition. For each of them the cross section, the intensity of the projectile beam and the target thickness define an upper production rate. The f...
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ژورنال
عنوان ژورنال: Physical Review Special Topics - Accelerators and Beams
سال: 1998
ISSN: 1098-4402
DOI: 10.1103/physrevstab.1.013501