Results 221 to 230 of about 6,408 (256)
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Radioactive decay by the emission of heavy nuclear fragments
Physica Scripta, 2007Radioactive decay of nuclei by the emission of heavy ions of C, N, O, F, Ne, Na, Mg, Al, Si and P isotopes (known as exotic decay or cluster radioactivity) is re-investigated within the framework of a semiempirical, one-parameter model based on a quantum mechanical, tunneling mechanism through a potential barrier, where both centrifugal and overlapping
O A P Tavares +2 more
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Health Physics, 2016
A planned laboratory space and exhaust system modification to the Pacific Northwest National Laboratory Material Science and Technology Building indicated that a new evaluation of the mixing at the air sampling system location would be required for compliance to ANSI/HPS N13.1-2011.
J Matthew, Barnett +3 more
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A planned laboratory space and exhaust system modification to the Pacific Northwest National Laboratory Material Science and Technology Building indicated that a new evaluation of the mixing at the air sampling system location would be required for compliance to ANSI/HPS N13.1-2011.
J Matthew, Barnett +3 more
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Spontaneous Emission of Neutrons from Radioactive Isotopes
Nature, 1934IN confirming the pioneer work of Fermi1 on radio-activity induced by neutron bombardment, Curie, Joliot and Preiswerk2 have shown that the radio active isotopes produced when phosphorus and magnesium are bombarded by neutrons emit: (1) negative electrons, (2) high energy –radiation ( 5 × 106 e.v.), (3) positrons (which they tenta tively ascribe to ...
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γ-ray Emission and the Law of Radioactive Transformation
Nature, 1927SOME time ago I described a method (Phil. Mag., vi. 47, 23; 1924) of determining the period of transformation of RaC′, which consisted essentially in comparing the transformation constant γ with the velocity v of the recoil-atoms from RaC. The apparatus is shown in Fig.
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Detection of pion‐induced radioactivity by autoradiography and positron emission tomography (PET)
Medical Physics, 1989An autoradiographic technique incorporating a new imaging system was used to detect pion‐induced radioactivity in Plexiglass and the results were compared with aluminium activation and PET imaging. The activity distribution in the region of the pion‐stopping peak was similar in all three cases.
H, Shirato +7 more
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Cluster emission in the radioactive decay of 223Ac
2010The branching ratio of 223Ac decay by spontaneous 14C emission was measured and a search for 15N clusters was performed. After exposure of a hemispherical array of solid-state nuclear track detectors, 347 14C events were identified and no 15N events. B(14C) = λ(14C)/λ(α) = (3.2 ± 1.0) x 10-11 is consistent with a favoured ground state to ground state ...
A. Guglielmetti +11 more
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Influence of radioactive emissions on the environmental situation of the western region
Vestnik KazNRTU, 2021А.М. Bissengaliyeva +2 more
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