|
Jan Kazimierz Danysz
Jean Danysz (11 March 1884 – 4 November 1914) born Jan Kazimierz Danysz, was a French physicist of Polish extraction. He was an assistant of Maria Skłodowska-Curie and notable in the development of beta spectrometry. Danysz made considerable advances on the magnetic deflection techniques of Baeyer, Hahn and Meitner, placing the source (he used radium) in a capillary tube under a slit, with a photographic plate in the same horizontal plane. By this means the known number of lines (later understood to be conversion lines) superimposed on the beta energy spectrum of RaB + RaC went from 9 to 27 (later work by Robinson and Rutherford found 64; 16 from RaB and 48 from RaC). He finished his doctoral thesis in 1913, and by 1914 he was considered by Rutherford as a leading researcher into beta decay, but he did no further work. He enlisted in the French army in 1914 and was killed in action near Cormicy. Publications J. Danysz, Le Radium 9, 1 (1912); 10, 4 (1913) Danysz, J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Rutherford
Ernest Rutherford, 1st Baron Rutherford of Nelson, (30 August 1871 – 19 October 1937) was a New Zealand physicist who came to be known as the father of nuclear physics. ''Encyclopædia Britannica'' considers him to be the greatest experimentalist since Michael Faraday (1791–1867). Apart from his work in his homeland, he spent a substantial amount of his career abroad, in both Canada and the United Kingdom. In early work, Rutherford discovered the concept of radioactive half-life, the radioactive element radon, and differentiated and named alpha and beta radiation. This work was performed at McGill University in Montreal, Quebec, Canada. It is the basis for the Nobel Prize in Chemistry he was awarded in 1908 "for his investigations into the disintegration of the elements, and the chemistry of radioactive substances", for which he was the first Oceanian Nobel laureate, and the first to perform the awarded work in Canada. In 1904, he was elected as a member to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1914 Deaths
This year saw the beginning of what became known as World War I, after Archduke Franz Ferdinand of Austria, heir to the Austrian throne was assassinated by Serbian nationalist Gavrilo Princip. It also saw the first airline to provide scheduled regular commercial passenger services with heavier-than-air aircraft, with the St. Petersburg–Tampa Airboat Line. Events January * January 1 – The St. Petersburg–Tampa Airboat Line in the United States starts services between St. Petersburg and Tampa, Florida, becoming the first airline to provide scheduled regular commercial passenger services with heavier-than-air aircraft, with Tony Jannus (the first federally-licensed pilot) conveying passengers in a Benoist XIV flying boat. Abram C. Pheil, mayor of St. Petersburg, is the first airline passenger, and over 3,000 people witness the first departure. * January 11 – The Sakurajima volcano in Japan begins to erupt, becoming effusive after a very large earthquake on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1884 Births
Events January–March * January 4 – The Fabian Society is founded in London. * January 5 – Gilbert and Sullivan's '' Princess Ida'' premières at the Savoy Theatre, London. * January 18 – Dr. William Price attempts to cremate his dead baby son, Iesu Grist, in Wales. Later tried and acquitted on the grounds that cremation is not contrary to English law, he is thus able to carry out the ceremony (the first in the United Kingdom in modern times) on March 14, setting a legal precedent. * February 1 – ''A New English Dictionary on historical principles, part 1'' (edited by James A. H. Murray), the first fascicle of what will become ''The Oxford English Dictionary'', is published in England. * February 5 – Derby County Football Club is founded in England. * March 13 – The siege of Khartoum, Sudan, begins (ends on January 26, 1885). * March 28 – Prince Leopold, the youngest son and the eighth child of Queen Victoria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marian Danysz
Marian Danysz (March 17, 1909 – February 9, 1983) was a Polish physicist, Professor of Physics at Warsaw University. Son of Jan Kazimierz Danysz. In 1952, he co-discovered with Jerzy Pniewski a new kind of matter, an atomic nucleus, which alongside a proton A proton is a stable subatomic particle, symbol , H+, or 1H+ with a positive electric charge of +1 ''e'' elementary charge. Its mass is slightly less than that of a neutron and 1,836 times the mass of an electron (the proton–electron mass ... and neutron contains a third particle: the lambda hyperon (). Ten years later, they obtained a hypernucleus in excited state, and the following year a hypernucleus with two lambda hyperons. 20th-century Polish physicists 1909 births 1983 deaths Fellows of the American Physical Society French emigrants to Poland {{Poland-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Danysz (biologist)
Jean Danysz (1860 – 1928) was a Polish pathologist with a considerable career in France, having spent much of his adult life at the Pasteur Institute in Paris. In 1890 he isolated Salmonella typhimurium. In 1893, he was involved in research into the flour moth, "scourge of the flour mill", Ephestia kuehniella. In 1898, he was working on rinderpest. In 1903, he worked on a way to control the vole plague in France. He was, in 1903, the first person to use radium to treat malignant diseases. He was contacted in 1905 regarding Australia's rabbit plagues and responding to the New South Wales government's offer of £25,000 for a novel solution to the country's rabbit pest problem, he arrived in Australia the following year to advise on biological control measures. He brought a strain of Pasteurella bacteria which he had developed to selectively kill feral rabbits and conducted a series of trials on Broughton Island, New South Wales coast with his team. He left in May 1907 af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cormicy
Cormicy () is a commune in the Marne department in north-eastern France. On 1 January 2017, the former commune of Gernicourt Gernicourt () is a former commune in the Marne department in northern France. Previously part of the Aisne department, it was merged on 1 January 2017 into the commune Cormicy, in Marne. 31 December 2016 See also * Communes of the Marne departmentReferences Commune ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Decay
In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called ''positron emission''. Neither the beta particle nor its associated (anti-)neutrino exist within the nucleus prior to beta decay, but are created in the decay process. By this process, unstable atoms obtain a more stable ratio of protons to neutrons. The probability of a nuclide decaying due to beta and other forms of decay is determined by its nuclear binding energy. The binding energies of all existing nuclides form what is called the nuclear band or valley of stability. For either electron or positron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium Series
In nuclear science, the decay chain refers to a series of radioactive decays of different radioactive decay products as a sequential series of transformations. It is also known as a "radioactive cascade". Most radioisotopes do not decay directly to a stable state, but rather undergo a series of decays until eventually a stable isotope is reached. Decay stages are referred to by their relationship to previous or subsequent stages. A ''parent isotope'' is one that undergoes decay to form a ''daughter isotope''. One example of this is uranium (atomic number 92) decaying into thorium (atomic number 90). The daughter isotope may be stable or it may decay to form a daughter isotope of its own. The daughter of a daughter isotope is sometimes called a ''granddaughter isotope''. The time it takes for a single parent atom to decay to an atom of its daughter isotope can vary widely, not only between different parent-daughter pairs, but also randomly between identical pairings of parent an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poland
Poland, officially the Republic of Poland, , is a country in Central Europe. Poland is divided into Voivodeships of Poland, sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 million people, and the List of European countries by area, seventh largest EU country, covering a combined area of . It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordering seven countries. The territory is characterised by a varied landscape, diverse ecosystems, and Temperate climate, temperate transitional climate. The capital and List of cities and towns in Poland, largest city is Warsaw; other major cities include Kraków, Wrocław, Łódź, Poznań, and Gdańsk. Prehistory and protohistory of Poland, Humans have been present on Polish soil since the Lower Paleolithic, with continuous settlement since the end of the Last Glacial Period over 12,000 years ago. Culturally diverse throughout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Roper Robinson
Harold Roper Robinson FRS (26 November 1889 – 28 November 1955) was a physicist and, in later life, an outstanding figure in university administration. Early life Robinson was born at 36 Ainslie Street in Ulverston, Lancashire on 26 November 1889, the eldest of four brothers and one sister to James Robinson, a managing clerk in a solicitor's office. Harold was educated at the Wesleyan School then the Victoria Secondary School in Ulverston. In 1908 he went to the University of Manchester to study physics on a scholarship. He graduated with a BSc in 1911 and gained an MSC in 1912. His postgraduate studies, and duties as an Assistant Lecturer. were interrupted by the First World War during which he served as a 2nd Lt in the Royal Garrison Artillery in France from 1915. He later transferred to the Field Survey Battalion of the Royal Engineers (mapping) first as a Captain then as an Adjutant. During the war, he worked with Lawrence Bragg on soundranging. After the war (1920) he ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
