|
Bruno Pontecorvo
Bruno Pontecorvo (; russian: Бру́но Макси́мович Понтеко́рво, ''Bruno Maksimovich Pontecorvo''; 22 August 1913 – 24 September 1993) was an Italian and Soviet nuclear physicist, an early assistant of Enrico Fermi and the author of numerous studies in high energy physics, especially on neutrinos. A convinced communist, he defected to the Soviet Union in 1950, where he continued his research on the decay of the muon and on neutrinos. The prestigious Pontecorvo Prize was instituted in his memory in 1995. The fourth of eight children of a wealthy Jewish-Italian family, Pontecorvo studied physics at the University of Rome ''La Sapienza'', under Fermi, becoming the youngest of his Via Panisperna boys. In 1934 he participated in Fermi's famous experiment showing the properties of slow neutrons that led the way to the discovery of nuclear fission. He moved to Paris in 1934, where he conducted research under Irène and Frédéric Joliot-Curie. Influence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marina Di Pisa
Marina di Pisa is a seaside resort of Tuscany, in central Italy. It is a ''frazione'' of the provincial capital of Pisa, which lies about 10 km to the east. Geography Marina di Pisa lies on the left bank of the Arno River, where it flows into the Tyrrhenian Sea. It is located directly north of the seaside resort of Tirrenia and about 10 kilometers West from Pisa. Behind the town are forested sections of the ''Parco Regionale San Rossore, Migliarino, e Massaciucoli''. From Marina di Pisa, it is possible to see the islands of Corsica, Elba and Gorgona; and the mountains of the Apuan Alps, Apennines, and ''Monti Pisani'' above Pisa. History Marina di Pisa was mostly built during the economic boom of the late 1800s, as a seaside resort. It was further developed in the 1930s. Many marine support industries developed at the mouth of the Arno river and in the area along its banks. Economy The German aviation company Dornier Flugzeugwerke based most of their production in the to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter. Nuclear physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons. Discoveries in nuclear physics have led to applications in many fields. This includes nuclear power, nuclear weapons, nuclear medicine and magnetic resonance imaging, industrial and agricultural isotopes, ion implantation in materials engineering, and radiocarbon dating in geology and archaeology. Such applications are studied in the field of nuclear engineering. Particle physics evolved out of nuclear physics and the two fields are typically taught in close association. Nuclear astrophysics, the application of nuclear physics to astrophysics, is crucial in explaining the inner workings of stars and the origin of the chemical elements. History The history of nuclear physics as a discipl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Communist Party
The French Communist Party (french: Parti communiste français, ''PCF'' ; ) is a political party in France which advocates the principles of communism. The PCF is a member of the Party of the European Left, and its MEPs sit in the European United Left–Nordic Green Left group. Founded in 1920, it participated in three governments: the provisional government of the Liberation (1944–1947), at the beginning of François Mitterrand's presidency (1981–1984), and in the Plural Left cabinet led by Lionel Jospin (1997–2002). It was also the largest party on the left in France in a number of national elections, from 1945 to 1960, before falling behind the Socialist Party in the 1970s. The PCF has lost further ground to the Socialists since that time. From 2009, the PCF was a leading member of the Left Front (''Front de gauche''), alongside Jean-Luc Mélenchon's Left Party (PG). During the 2017 presidential election, the PCF supported Mélenchon's candidature; however, tensio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emilio Sereni
Emilio Sereni (13 August 1907, Rome – 20 March 1977, Rome) was an Italian writer, politician and historian. Biography Born into a Jewish family of anti-fascist intellectuals, Sereni graduated from the Liceo Terenzio Mamiani in Rome. Brother of the Zionist and socialist Enzo Sereni, co-founder of the kibbutz Givat Brenner, and of Enrico Sereni, a scientist linked to the anti-fascist movement ''Giustizia e Libertà'', who committed suicide at a young age. In 1926, Sereni joined the Italian Communist Party and one year later he graduated in agronomy in Portici, starting shortly after a work of proselytism in the Neapolitan area, where he met Giorgio Amendola. In 1930 he went to Paris and came into contact with Palmiro Togliatti. Returning to Italy in September of the same year, he was arrested and sentenced by the Special Tribunal for the Defense of the State to twenty years, then reduced to 15 for the accumulation of penalties. Amnestied in 1935, Sereni fled to Paris with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frédéric Joliot-Curie
Jean Frédéric Joliot-Curie (; ; 19 March 1900 – 14 August 1958) was a French physicist and husband of Irène Joliot-Curie, with whom he was jointly awarded the Nobel Prize in Chemistry in 1935 for their discovery of Induced radioactivity. They were the second ever married couple, after his wife's parents, to win the Nobel Prize, adding to the Curie family legacy of five Nobel Prizes. Joliot-Curie and his wife also founded the Orsay Faculty of Sciences, part of the Paris-Saclay University. Biography Early years Born in Paris, France, Frédéric Joliot was a graduate of ESPCI Paris. In 1925 he became an assistant to Marie Curie, at the Radium Institute. He fell in love with her daughter Irène Curie, and soon after their marriage in 1926 they both changed their surnames to Joliot-Curie. At the insistence of Marie, Joliot-Curie obtained a second baccalauréat, a bachelor's degree, and a doctorate in science, doing his thesis on the electrochemistry of radio-elements. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irène Joliot-Curie
Irène Joliot-Curie (; ; 12 September 1897 – 17 March 1956) was a French chemist, physicist and politician, the elder daughter of Pierre and Marie Curie, and the wife of Frédéric Joliot-Curie. Jointly with her husband, Joliot-Curie was awarded the Nobel Prize in Chemistry in 1935 for their discovery of induced radioactivity, making them the second-ever married couple (after her parents) to win the Nobel Prize, while adding to the Curie family legacy of five Nobel Prizes. This made the Curies the family with the most Nobel laureates to date. She was also one of the first three women to be a member of a French government, becoming undersecretary for Scientific Research under the Popular Front in 1936. Both children of the Joliot-Curies, Hélène and Pierre, are also prominent scientists. In 1945, she was one of the six commissioners of the new French Alternative Energies and Atomic Energy Commission (CEA) created by de Gaulle and the Provisional Government of the French Rep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Fission
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay. Nuclear fission of heavy elements was discovered on Monday 19 December 1938, by German chemist Otto Hahn and his assistant Fritz Strassmann in cooperation with Austrian-Swedish physicist Lise Meitner. Hahn understood that a "burst" of the atomic nuclei had occurred. Meitner explained it theoretically in January 1939 along with her nephew Otto Robert Frisch. Frisch named the process by analogy with biological fission of living cells. For heavy nuclides, it is an exothermic reaction which can release large amounts of energy both as electromagnetic radiation and as kinetic energy of the fragments (heating the bulk material where fission takes place). Like nuclear fusion, for fission to produce energy, the total binding energy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutrons
The neutron is a subatomic particle, symbol or , which has a neutral (not positive or negative) charge, and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons. Their properties and interactions are described by nuclear physics. Protons and neutrons are not elementary particles; each is composed of three quarks. The chemical properties of an atom are mostly determined by the configuration of electrons that orbit the atom's heavy nucleus. The electron configuration is determined by the charge of the nucleus, which is determined by the number of protons, or atomic number. The number of neutrons is the neutron number. Neutrons do not affect the electron configuration, but the sum of atomic and neutron numbers is the mass of the nucleus. Atoms of a chemical element that di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Via Panisperna Boys
Via Panisperna boys (Italian: ''I ragazzi di Via Panisperna'') is the name given to a group of young Italian scientists led by Enrico Fermi, who worked at the Royal Physics Institute of the University of Rome La Sapienza. In 1934 they made the famous discovery of slow neutrons, which later made possible the nuclear reactor and then the construction of the first atomic bomb. The nickname of the group comes from the address of the Institute, located in a street of Rione Monti in the city centre, which got its name from a nearby monastery, San Lorenzo in Panisperna. The other members of the group were Edoardo Amaldi, Oscar D'Agostino, Ettore Majorana, Bruno Pontecorvo, Franco Rasetti and Emilio Segrè. All were physicists, except for D'Agostino, who was a chemist. The growth of the group The group grew under the supervision of the physicist, minister, senator and director of the Institute of Physics Orso Mario Corbino. Corbino recognized the qualities of Enrico Fermi and led ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruno Pontecorvo Prize
The Bruno Pontecorvo Prize (russian: Премия имени Бруно Понтекорво) is an award for elementary particle physics, established in 1995 by the JINR in Dubna to commemorate Bruno Pontecorvo. The prize is mainly given for neutrino physics, which was Pontecorvo's principal research field, and usually to a single scientist. It is offered internationally every year. Winners See also * List of physics awards This list of physics awards is an index to articles about notable awards for physics. The list includes lists of awards by the American Physical Society of the United States, and of the Institute of Physics of the United Kingdom, followed by a li ... References {{DEFAULTSORT:Pontecorvo Prize Particle physics Physics awards Russian science and technology awards ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muon
A muon ( ; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 '' e'' and a spin of , but with a much greater mass. It is classified as a lepton. As with other leptons, the muon is not thought to be composed of any simpler particles; that is, it is a fundamental particle. The muon is an unstable subatomic particle with a mean lifetime of , much longer than many other subatomic particles. As with the decay of the non-elementary neutron (with a lifetime around 15 minutes), muon decay is slow (by subatomic standards) because the decay is mediated only by the weak interaction (rather than the more powerful strong interaction or electromagnetic interaction), and because the mass difference between the muon and the set of its decay products is small, providing few kinetic degrees of freedom for decay. Muon decay almost always produces at least three particles, which must include an electron o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defection
In politics, a defector is a person who gives up allegiance to one state in exchange for allegiance to another, changing sides in a way which is considered illegitimate by the first state. More broadly, defection involves abandoning a person, cause, or doctrine to which one is bound by some tie, as of allegiance or duty. This term is also applied, often pejoratively, to anyone who switches loyalty to another religion, sports team, political party, or other rival faction. In that sense, the defector is often considered a traitor by their original side. International politics The physical act of defection is usually in a manner which violates the laws of the nation or political entity from which the person is seeking to depart. By contrast, mere changes in citizenship, or working with allied militia, usually do not violate any law(s). For example, in the 1950s, East Germans were increasingly prohibited from traveling to the western Federal Republic of Germany where they were au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Marina Di Pisa")
.JPG "Click for more on -> French Communist Party")
