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    "label": "Report, OSI - 1/49, Central Intelligence Agency, An Estimate of Swedish Capabilities in Science",
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    "title": "Report, OSI - 1/49, Central Intelligence Agency, An Estimate of Swedish Capabilities in Science",
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        "President's Secretary's Files (Truman Administration)",
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    "seq": 39,
    "pageIndex": 0,
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    "ocrText": "SECRET\nplication of tracer elements to other branches of physics, to biology, and to engineering.\nIn many aspects the work of the Swedish group parallels that of the M.I.T. group\nworking on similar problems. Many of the problems attacked and solved are similar\nto those under active study in the US and elsewhere.\nA recent note by Hole on the statistical analysis of counter data is worthy of\nrecord because it contributes to the estimation of decay periods, one of the most im-\nportant constants of radioactive nuclei. A small amount of attention is given to\ncounters and counter circuits. Some work is being done with the Nobel Institute's old\ncyclotron. Recently a paper was published by H. Slatis (Slatis is a Finn) on the activa-\ntion of dysprosium by slow neutrons. The neutrons were obtained by the (d, Be)\nreaction. The activity of the dysprosium was studied by means of the absorption beta\nspectrum and the internal-conversion effects.\nFor a discussion of mass spectrometers see page 34.\nc.\nOther Areas of Research\nLise Meitner is known to be active at the Institute of Physics in research on\nfission processes. She is also concerned with deuteron-induced activity in copper. She\nreceived a grant of 6,600 kronor ($1,500.00) for research at the University of Stockholm\nfor the first half of 1947, and is also working with M. Siegbahn and von Hevesy at the\nCaroline Institute.\nH. Ubisch has recently described the design and operation of a neutron monitor\nof high sensitivity for use with a cyclotron. The monitor is a boron-lined paraffin-\nshielded ionization chamber and a d-c amplifier of conventional type.\nA small amount of nuclear research is being started at the Physics Institute\nof the University of Uppsala. A small Van de Graaff machine, of 800-1000 kv capacity,\nis being readied. Experiments planned around a source of neutrons from the (d,d)\nreaction will be started. This is probably preliminary to active work with the new\ncyclotron of Svedberg's, which is located only a few score yards away.\nAt KTH, Stockholm, again in Alfven's Group, considerable effort is being put\ninto the study of cosmic rays. K. G. Malmfors has constructed a number of large\ncounters to investigate the diurnal variation of cosmic-ray intensity. He is looking\nfor the cause of the variation and has found that it is not produced solely in the\natmosphere; that is, it does not arise solely from a variation in absorption or in the\nheight of the meson-creating layer. It does not depend on the daily variation of the\nearth's nor the sun's magnetic field. The counters used are large (60 cm in length\nand 15 cm in diameter), though conventional. In order to obtain requisite statistical\nreliability a five-year program is planned.\nAt the Chalmers Institute a new laboratory is planned for nuclear physics and\nnuclear chemistry. No details of the program are available. Similarly, at the Research\nInstitute of National Defense a section is devoted to military aspects of nuclear physics\n(probably power applications), but again no details are known.\nThe newly developed technique of Powell in using the photographic plate to\nstudy nuclear processes has been applied by R. Westoo to the study of the Th disintegra-\ntion series.\n(1) Theoretical Nuclear Physics\nIn the field of theoretical nuclear physics, Sweden possesses only a few,\nbut brilliant men. From the recent publications it is learned that O. Klien, of the\nDivision of Mechanics and Mathematics, KTH, is very active in the study of meson\nfields and nuclear interactions from the point of view of relativistic quantum mechanics.\nA theory of nuclear interaction is formulated in analogy with the field theory of electric and\ninteraction, mesons taking the place of photons. Field equations are found\nSECRET\n32"
}