The Detection of Light and Heavy Mesotrons Outside the Tank of the 184-inch Cyclotron PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
It is of general interest to make the mesons artificially produced in the 184-inch cyclotron available for general experiments outside the tank. Thus far only photographic techniques have been used in conjunction with the Berkeley meson work. By bringing the beam outside the tank it is hoped that cloud chamber, and possibly counter methods, may be used in meson studies. In addition, the measurement of the lifetime of the [pi] meson appears possible if long meson trajectories are obtained. The method discussed here accomplishes the removal of the mesons from the cyclotron tank by allowing the mesons produced in a thin target struck by the 380 Mev alpha particle beam to enter a region of very weak magnetic field which permits them to leave the tank along a path of weak curvature. The technical problem involved here is, therefore, to produce a magnetic shield which reduces the field of the cyclotron from about 14,000 gauss to about 1,000 gauss, and to place this shield within a very short distance of the circulating beam without disturbing the dynamics of the beam itself.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
It is of general interest to make the mesons artificially produced in the 184-inch cyclotron available for general experiments outside the tank. Thus far only photographic techniques have been used in conjunction with the Berkeley meson work. By bringing the beam outside the tank it is hoped that cloud chamber, and possibly counter methods, may be used in meson studies. In addition, the measurement of the lifetime of the [pi] meson appears possible if long meson trajectories are obtained. The method discussed here accomplishes the removal of the mesons from the cyclotron tank by allowing the mesons produced in a thin target struck by the 380 Mev alpha particle beam to enter a region of very weak magnetic field which permits them to leave the tank along a path of weak curvature. The technical problem involved here is, therefore, to produce a magnetic shield which reduces the field of the cyclotron from about 14,000 gauss to about 1,000 gauss, and to place this shield within a very short distance of the circulating beam without disturbing the dynamics of the beam itself.
Author: John Burfening Publisher: ISBN: Category : Cyclotrons Languages : en Pages : 14
Book Description
Positive mesons produced by 380 Mev alpha-particles in the 184-inch Berkeley cyclotron have been detected by means of photographic plates. The experimental arrangement is similar to that used for detecting negative mesons except that the plates are placed in a position to receive positive instead of negative particles from the target. Heavy positive mesons are observed to decay into secondary mesons in the manner described by Lattes, Occhialini and Powell. Relative numbers of positive aid negative me sons coming from a target are found by placing plates symmetrically on opposite sides of the target. Preliminary results indicate that for a 1/16 inch carbon target there are about one fourth as many heavy positive mesons as heavy negative ones for meson energies of 2-3 Mev in the laboratory system.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The mass of the mesons produced by the 184-inch Berkeley cyclotron has been determined by measuring the bending in the magnetic field and the range in emulsion. The radius of curvature of the trajectory is found by measuring the distance from the target to the point at which the mesons enters the emulsion and the angle which the track makes with the edge of the plate. From the first 50 meson tracks measured they find a mass of 313 ± 16 electron masses. It is highly probable that these mesons are the heavy mesons described by Lattes, Occhialini, and Powell. The mass determination which we have made was done with apparatus intended only for survey work, and some of the error is associated with lack of precision of location of the photographic plates. There was an aluminum foil of thickness 0.001 inches in front of the plates. It is thought that much better accuracy will be possible with better apparatus and a thinner foil.
Author: Publisher: ISBN: Category : Languages : en Pages : 11
Book Description
Positive mesons produced by 380 Mev alpha-particles in the 184-inch Berkeley cyclotron have been detected by means of photographic plates. The experimental arrangement is similar to that used for detecting negative mesons except that the plates are placed in a position to receive positive instead of negative particles from the target. Heavy positive mesons are observed to decay into secondary mesons in the manner described by Lattes, Occhialini and Powell. Relative numbers of positive aid negative me sons coming from a target are found by placing plates symmetrically on opposite sides of the target. Preliminary results indicate that for a 1/16 inch carbon target there are about one fourth as many heavy positive mesons as heavy negative ones for meson energies of 2-3 Mev in the laboratory system.
Author: Henry De Wolf Smyth Publisher: Legare Street Press ISBN: 9781015421622 Category : History Languages : en Pages : 0
Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Thormod Henriksen Publisher: CRC Press ISBN: 0203166353 Category : Science Languages : en Pages : 241
Book Description
Radiation and the effects of radioactivity have been known for more than 100 years. International research spanning this period has yielded a great deal of information about radiation and its biological effects and this activity has resulted in the discovery of many applications in medicine and industry including cancer therapy, medical diagnostics
Author: Bernard Jaffe Publisher: Courier Corporation ISBN: 0486141845 Category : Science Languages : en Pages : 388
Book Description
Classic popular account of the great chemists Trevisan, Paracelsus, Avogadro, Mendeléeff, the Curies, Thomson, Lavoisier, and others, up to A-bomb research and recent work with subatomic particles. 20 illustrations.
Author: Ranjan Roy Daniel Publisher: ISBN: Category : Biography & Autobiography Languages : en Pages : 340
Book Description
This tribute to M.G.K. Menon, presently a member of the Indian Planning Commission, includes contributions from some of his many friends, admirers, and colleagues. For over three decades, Menon has been an major influence on Indian science as a physicist, administrator, and policy maker, and this collection reflects the outstanding tradition of Indian science with which he is so closely identified.
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Author: John Burfening
Author: Stanford University
Author: Eugene Gardner
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Author: Henry De Wolf Smyth
Author: Thormod Henriksen
Author: Bernard Jaffe
Author: Ranjan Roy Daniel