11 of 11 people found the following review helpful:
5.0 out of 5 stars
The Beginning of Nuclear Physics, February 4, 2005
People had always thought that solid matter was, well, solid. It was only when scientists had an understanding of what atoms were that they began to realize that there were huge spaces between atoms. Later they got to understand that an atom itself consisted mostly of empty space, a big outer shell where electrons whizzed around, containing only a tiny nucleus. The image of the big shell and the tiny nucleus was given by comparison, a comparison that gives the title to _The Fly in the Cathedral: How a Group of Cambridge Scientists Won the International Race to Split the Atom_ (Farrar, Straus and Giroux) by Brian Cathcart. Actually, the atom had been split long before, if the atom, which had been considered indivisible, is split by chipping electrons off that outer cathedral-like shell. But "splitting the atom" has long had the real meaning of splitting the nucleus, and this is the intriguing story of the stolid, energetic and gentlemanly scientists at the Cavendish Laboratory in Cambridge who in 1932 brought forth the birth of nuclear physics.
The commanding presence in the book, just as he was as he oversaw the lab, is Sir Earnest Rutherford, a "barreling, thundering, penetrating presence in the world of physics, a great rowdy boy full of ideas and energy." He was thrilled by the ardor of the chase in scientific exploration, and he was an ingenious experimenter, although he was often clumsy with apparatus. In 1927, Rutherford as its president addressed the Royal Society, proposing a new way forward for solving the problem of the composition of the nucleus. If it were possible to accelerate particles artificially, he said, by huge voltages of electricity, they could be slammed against the nucleus and the scattered wreckage analyzed. This sounds completely sensible now, but there was no equipment that could produce such accelerations. The two heroes of this book, John Cockcroft and Ernest Walton, worked in Rutherford's lab, and were easily persuaded to join the chase. Cockcroft was so quiet that his children eventually made the rule that "Daddy could not leave the dinner table until he had uttered two whole sentences." He was superb at designing and making experimental equipment that no one else had thought of before, but was not the experimenter that Rutherford would have liked. Walton was. Another quiet man, he was the son of a minister and a devout Methodist who shunned any activity that might be called frivolous. He came up with the idea of accelerating particles electrically on his own, and when he proposed such work to his boss, Rutherford was of course delighted. In 1932, after almost four years of patient, frustrating, exhausting, and inspiring work, protons bombarded a strip of lithium, and the lithium nucleus cracked open into two helium nuclei.
Part of the charm of this book is that it describes work done in a scientific atmosphere that was like none found today. Rutherford, even though a hard taskmaster, insisted that at six at night, everyone had to go home. He would not have his researchers overextend themselves, and at that time, all circuits were switched off, no matter what experiment was in progress. He did, however, allow this strict curfew to be waived once Walton and Cockcroft had made their initial findings, so that they could confirm them and rush into print ahead of the other experimenters in other nations that were trying to break down the nucleus as well. The two experimenters did not exactly become household names, like, say, Watson and Crick, but there was some (often misdirected) praise from the press, and they got plenty of recognition from their peers. Albert Einstein visited the lab and was thrilled with what he saw; incidentally, the experiment was the first laboratory verification of his famous equation E = mc^2. It took almost twenty years, but Walton and Cockcroft were awarded Nobel prizes, which also failed to make them famous. Modest, quiet, gray scientists, they probably were happy to have it that way.
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7 of 8 people found the following review helpful:
5.0 out of 5 stars
Exciting account of atomic sudies and early quantum theory, January 11, 2005
I thoroughly enjoyed this book. Maybe it is just me, I relish Scientific American and I as an engineer and I have always been interested in technology and its history. This book made me feel like I was working with Walton and Cockcroft under Rutherford at the famous Cavendish labs in England as they toiled to build a proton accelerator to smash the nucleus before other labs could beat them with cyclotrons and Van de Graf generators. It was an exciting race. It explains how to build a rectifier for 700kv out of huge hand made vacuum tubes. All the big names in early quantum mechanics make an appearance. The politics, the challenges, etc. I highly recommend it.
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4 of 4 people found the following review helpful:
5.0 out of 5 stars
Splitting the Atom, July 10, 2005
In my school days, I had come across the names of Rutherford, J.J.Thomson and Chadwick but not the two protagonists of this book - John Cockcroft and Ernest Walton. Cockcroft and Walton were the first physicists who successfully 'split' or disintegrated the nucleus.
What is interesting about this book is that it manages to provide us with a feel of the excitement and challenges experienced by physicists at the Cavendish Lab during the 1920s-1930s. Most general history of physics tend to focus on ideas and theories but not the nitty gritty aspects of building apparatus and conducting experiments. Instead of taking the former route, this book emphasizes on the importance of empirical physics and its interactions with theoretical physics. At the center of this story is how Cockcroft and Walton raced to build a particle accelerator that is used to bombard the nucleas.
But machines are not the central element of the book. The author devotes a great deal of space to building a human aspect of the story. Aside from Cockcroft and Walton, we are are fed with vignettes of Rutherford (who provided crucial leadership at Cavendish) as well as others like Chadwick, Gamow, and the Bohr brothers.
A particularly interesting aspect of the book is the competition between the different groups of scientists in different countries (UK, USA, France) working on the same problem. This is more intense given the winner-take-all nature of breakthrough discoveries in term of academic (and public) fame.
This book should be of great interest to readers who enjoy reading about the general history of physics. Lack of knowledge or memory of physics would not be an obstacle to the enjoyment of this very readable book. Highly recommended.
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