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He sacrifices truth to modesty - and I sympathize with him in his temptation.

Otto Hahn: Achievement and Responsibility

Ronald E. Knowles , Toronto, Your discovery has caused a huge sensation in the whole scientific world, and every laboratory which has the necessary means is now working on the consequences of your discovery. Rudolf Ladenburg , Princeton, February 22nd, It must certainly be a great joy for you and Strassmann that you have made the whole world of physics excited. That is really wonderful! Otto Hahn's humane and scientific personality is an indivisible whole. A very lively intellectual intuition, a very sound ability, an exceptional and critical ability for observation, an unshakeable dependability and doggedness next to great inner modesty and natural kindness mark the man as they do his work.

Lise Meitner , Stockholm, A man of the world. He has been the most helpful of the professors and his sense of humour and common sense has saved the day on many occasions.

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He is definitely friendly disposed to England and America. Major Terence H. Rittner , Farmhall near Cambridge, summer No living man has so successfully spanned the world of discovery from radiothorium to fission, one of the greatest - if not the greatest - discovery of all times. Samuel C. Lind , Minneapolis, With his humour and his sound humanity Otto Hahn quickly gained ground at the Geneva Conference to which we other members of the German delegation became very indebted.

We even went to the official Soviet reception, at which we were also able to bask in Hahn's fame. This visit took place against resistance from the Foreign Office, for the Federal Republic of Germany had no diplomatic relations with Moscow. Karl Winnacker , Bonn, The discovery of nuclear fission by Otto Hahn and Fritz Strassmann opened up a new era in human history. It seems to me that what makes the science behind this discovery so remarkable is that it was achieved by purely chemical means. The significance accorded to the outcome from the scientific point of view becomes clear when one reads in the first publication of nuclear fission that Professor Hahn, who had over thirty years of practical and theoretical experience in the sphere of radioactivity and whose judgement unquestionably commanded the greatest weight among fellow scientists both in Germany and the whole world, announced the new discovery only hesitatingly.

The radiochemical methods he applied, which were partly developed by him, tested out hundreds of times in the course of thirty years, and found to be reliable, did not permit any doubt about the finding. Fritz Strassmann , Mainz, Hahn is an old wally who can not hold back his tears or sleep at night if he thinks of Hiroshima. Otto Hahn was also in Geneva. He was small and quiet, with a retiring manner. Little tufts of thin white hair framed his face, and there was often a bewildered expression in his blue eyes, as if he were still astonished at the great things that had come from his discovery of fission.

Laura Fermi , widow of Prof.

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Enrico Fermi , Chicago, I must emphasise, that this proof of fission with such a low presence of the identifying preparation was in actuality a masterpiece of radiochemistry, in which at that time hardly anybody else other than Otto Hahn and Strassmann would have been able to succeed. Lise Meitner , Cambridge, Can one, may one, hold the researcher responsible for the consequences of his work?

Everyone who knew Otto Hahn knew with what unsparing clarity he had put this question to himself. We admire him, who as a researcher in his work, just as much as a man in his thought and deed, was ever a model of uprightness and conscientiousness, and even more so by the questions and answers he raised and gave by virtue of his personal conduct. Max Steenbeck , Berlin, It has been given to very few men to make contributions to science and to humanity of the magnitude of those made by Otto Hahn.

He has made those contributions over a span of nearly two generations, beginning with a key role in the earliest days of radiochemistry in investigating and unraveling the complexities of the natural radioactivities and culminating with his tremendous discovery of the nuclear fission of uranium. I believe that it is fair to refer to Otto Hahn as the father of radiochemistry and of its more recent offspring, nuclear chemistry. For his special genius the world of science will be forever grateful. Glenn T. There are occurrences far removed from social and political events, let alone any sensation, and without relation to the course of history - and yet their taking place leads the world, deeply moved, to hold its breath for a moment, and people, far and wide, to halt for a moment of reflection amid the rush of the everyday: Otto Hahn, almost 90 years old, has left the world.

A good, a simple man has entered his name in both the history of the natural sciences and the history of humanity. As long as intellect and character, scholarship and humanity maintain their value, Otto Hahn will be of relevance to the coming generations. Walther Gerlach , Munich, Hahn remained modest and informal all his life.

Physiker Otto Hahn

His disarming frankness, unfailing kindness, good common sense and impish humour will be remembered by his many friends all over the world. Otto Robert Frisch , Cambridge, The number of those who had been able to be near Otto Hahn is small. His behaviour was completely natural to him, but for the next generations he will serve as a model, regardless of whether one admires in the attitude of Otto Hahn his humane and scientific sense of responsibility or his personal courage. Otto Hahn's achievements are known universally and will hold a special place in the history of science.

He is remembered too for his whole character, his generosity of spirit, his belief in the proper use of scientific discovery and for his humanity. The Royal Society , London, Co-author with Fritz Strassmann, German chemist Heilbron and Robert W. Hahn and F. Strassmann have discovered a new type of nuclear reaction, the splitting into two smaller nuclei of the nuclei of uranium and thorium under neutron bombardment.

Thus they demonstrated the production of nuclei of barium, lanthanum, strontium, yttrium, and, more recently, of xenon and caesium.

Otto Hahn: Achievement and Responsibility: By Klaus Hoffmann, J Michael Cole | eBay

It can be shown by simple considerations that this type of nuclear reaction may be described in an essentially classical way like the fission of a liquid drop, and that the fission products must fly apart with kinetic energies of the order of hundred million electron-volts each. See also: 8 Mar - short biography, births, deaths and events on date of Hahn's birth.

Booklist for Otto Hahn. In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful.