Blackett

P. M. S. Blackett (Manchester) development of the Wilson cloud chamber method and discoveries therewith in the field of nuclear physics and cosmic radiation. 

MD. W. Blackett, Some Blotto Games, Naval Research Logistics Quarterly, 1, No. 1 (1954). 

The efforts of other Solvay Interox personnel including, S.E. Blackett, S.C. Oakes, D. Pyke and S. L. Wilson, in developing this technology are gratefully acknowledged. 

For a review that lists many rate constants for abstraction of hydrogen at various positions of many molecules, see Hendry, D.G. Mill, T. Piszkiewicz, L. Howard, J.A. Eigenmann, H.K. J. Phys. Chem. Ref. Data, 1974, 3, 937 Roberts, B.P. Steel, A.J. Tetrahedron Lett., 1993, 34, 5167. See Tanko, J.M. Blackett, J.F. J. Chem. Soc., Perkin Trans. 2,1996, 1775 for the absolute rate constants for abstraction of chlorine by alkyl radicals. 

Baker R, Blackett BN, Cookson RC, Cross RC, Madden DP (1972) J Chem Soc Chem Commun, p 343... 

RS Sohal, RG Allen. In Molecular Biology of Aging. AD Woodhead, AD Blackett, A Hollsender (eds), Plenum Publishing, 1983, pp 75-104. 

Blackett discovered that the process was not one of disintegration, but one of integration only two tracks were seen after the interaction occurred, meaning that the alpha particle was absorbed as the proton was ejected. The resulting nucleus was a heavy isotope of oxygen. 

Rutherford s attitude toward chemistry was stereotyped by his jokes and barbs occasionally directed at his chemical colleagues. The later Manchester physicist P. M. S. Blackett recounted the famous crack, "All science is either physics or stamp collecting, "63 and it was said that Rutherford chafed at receiving the 1908 Nobel Prize in chemistry, rather than in Physics. In a lecture in which he described his theory of the nuclear atom, he joked that the "nucleus is a round, hard objectjust like Professor Perkins head."64 However, Rutherford expressed great respect for his chemist collaborator Frederick Soddy and for other chemists, as well. 

Condensed Matter Theory The Blackett Laboratory Imperial College London SW7 2BZ. UK... 

Adolf Hitler, Mein Kampf, trans. J. Murphy (London Hurst and Blackett, 1939), pp. 541-2. 

In the discussion that followed a number of participants took the floor Lise Meitner, Werner Heisenberg, Enrico Fermi, Maurice de Broglie, Wolfgang Bothe, and Patrick Blackett. 

In his intervention Blackett treated the discovery of the positron in cosmic rays by C. D. Anderson in 193246 and its confirmation by Blackett and Occhialini,47 who had introduced, for the first time, the technique of triggering a vertical cloud chamber by means of the coincidence between two Geiger counters, one placed above, the other below the chamber. Blackett also discussed a number of papers by Meitner and Philipp, Curie-Joliot, Blackett, Chadwick and Occhialini, and Anderson and Nedder-meyer,48 all appearing almost at the same time, on the production of positrons in various elements irradiated with the -/-rays of 2.62 MeV energy of The. These were the first observations of electron-positron pair production. He also pointed out that the observed production of positrons has a cross section larger than the nuclear dimensions, and therefore, most probably, does not originate from a nuclear process. 

Then Blackett examined the nature of showers observed in cosmic rays starting from Bruno Rossi s experiment with three nonaligned counters in coincidence and Rossi s curve showing the dependence of the number... 

A few reports on different topics were also presented to the same conference. Blackett discussed The Magnetic Field of Massive Rotating... 

The positron was subsequently discovered by Anderson (1933) in a cloud chamber study of cosmic radiation, and this was soon confirmed by Blackett and Occhialini (1933), who also observed the phenomenon of pair production. There followed some activity devoted to understanding the various annihilation modes available to a positron in the presence of electrons radiationless, single-gamma-ray and the dominant two-gamma-ray processes were considered (see section 1.2). The theory of pair production was also developed at this time (see e.g. Heitler, 1954). 

As the speed of the impacting electrons is still further increased no new processes are observed by the positive ray or clean-up methods. Some experimenters have observed additional ionization setting in at about thirty volts. Of more importance, however, are the results of Franck and Blackett, who showed that the emission of Balmer lines was a primary result of impact of thirty volt or higher speed electrons. In other words, they showed dissociation may occur with excitation of one (or perhaps both) atoms. 

W. M. C. Foulkes (189) The Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom... 

P. M. S. Blackett has taken photographs of about a million alpha-ray tracks in nitrogen and other gases. Among these million photographs he found about a dozen which show a proton knocked out of an atom by an alpha-ray. Tracings from some of these remarkable photographs are shown in Fig. 5. The proton makes a much thinner track than the alpha-ray. 

---