January
Important historic
dates in science
January
31: U.S. H-bomb
In 1950, President
Harry S. Truman announced a program to develop the American hydrogen bomb.
"I have directed ... work on all forms of atomic weapons, including
the so called hydrogen or superbomb. Like all other work in the field
of atomic weapons, it is being and will be carried forward on a basis
consistent with the overall objectives of our program for peace and security
... until a satisfactory plan for international control of atomic energy
is achieved. We shall also continue to examine all those factors that
affect our program for peace and this country, security." This response
followed his earlier announcement, on September 23, 1949, that had shocked
America, "We have evidence that within recent weeks an atomic explosion
occurred in the USSR."
January
30: Hydrogen
bomb
In 1950, development
of the hydrogen fusion bomb (H-bomb) was ordered by U.S. President Truman.
The codename of "Super" for the project reflected the far greater
power of this thermonuclear device over the earlier fission bombs used
to end WW II.
January
29: Radiation
treatment
In 1896, Émil
H. Grubbe, a Chicago researcher, became the first known to administer
x-ray radiation treatment for the recurrent breast cancer of a fifty-five-year-old
woman. X-rays had been discovered the previous year in Germany. Grubbe
tried radiation as a tool against cancer after he suffered a radiation
burn while experimenting with X-rays. His experiment didn't cure the woman's
cancer, but others in the late 1890s who applied X-rays to various cancers
- especially skin cancer - not only relieved cancer pain but actually
cured some, which encouraged continued use and study of the X-rays. Grubbe
did not publish his work until several years later, and his claims of
priority as the first to use radiation treatment were widely doubted.
January
28: Atomic
power
In 1958, the first
privately-owned thorium-uranium atomic reactor to supply power began construction.
It was the first reactor designed to supplement fissionable uranium-235
with fertile thorium-232. This was the Indian Point nuclear generating
station, built at Buchanan, New York, at a cost of $100 million. It was
a pressurized water reactor able to produce 275,000 kilowatts of power.
The design and construction was executed by the Babcock and Wilcox Co.
for the Consolidated Edison Co. The Indian Point 1 operating licence was
dated March 26, 1962 and its shutdown date was October 31, 1974.
January
27: Hyman
G. Rickover
(Born January 27,
1900: Died July 8, 1986)
Hyman (George) Rickover, born in Makow, Russia (now Poland), immigrated
to the US (1906) and graduated from the Naval Academy in 1922. He eventually
became an Admiral. He is known as the Father of the Nuclear Navy for his
leadership to build the atomic-powered submarine, USS Nautilus (1954).
He served on active duty with the United States Navy for more than 63
years, receiving exemptions from the mandatory retirement age due to his
critical service in the building of the United States Navy's nuclear surface
and submarine force.
January
26: Pollykarp
Kusch
(Born January 26,
1911: Died March 20, 1993)
German-American physicist who shared the Nobel Prize for Physics in 1955
for his accurate determination that the magnetic moment of the electron
is greater than its theoretical value. This he deduced from researching
the hyperfine structure of the energy levels in certain elements, and
in 1947 found a discrepancy of about 0.1% between the observed value and
that predicted by theory. Although minute, this anomaly was of great significance
to theories of the interactions of electrons and electromagnetic radiation,
now known as quantum electrodynamics. (He shared the prize with Willis
E. Lamb, Jr. who performed independent but related experiments at Columbia
University on the hyperfine structure of the hydrogen atom.)
January
25: Atomic
clock
In 1955, Columbia
University scientists developed an atomic clock accurate to within one
second in 300 years.
January
24: Sir David
Gill
(Born June 12, 1843:
Died January 24, 1914)
Scottish astronomer known for his measurements of solar and stellar parallax,
showing the distances of the Sun and other stars from Earth, and for his
early use of photography in mapping the heavens. His early training in
timekeeping as a watchmaker led to astronomy and he designed, equipped,
and operated a private observatory near Aberdeen. To determine parallaxes,
he perfected the use of the heliometer, a telescope that uses a split
image to measure the angular separation of celestial bodies. He was appointed
Her Majesty's Astronomer at the Cape of Good Hope (1879-1906). Gill also
made geodetic surveys of South Africa. In fact he carried out all of the
observations to measure the distances to stars in terms of the standard
meter.
January
23: Paul Peter
Ewald
(Born January 23,
1888: August 22, 1985)
German physicist and crystallographer whose theory of X-ray interference
by crystals was the first detailed, rigorous theoretical explanation of
the diffraction effects first observed in 1912 by his fellow physicist
Max von Laue.
January
22: Albert
Wallace Hull
(Born April 19, 1880:
Died January 22, 1966)
American physicist who independently discovered the powder method of X-ray
analysis of crystals (1917), which permits the study of crystalline materials
in a finely divided microcrystalline, or powder, state. His first work
was on electron tubes, X-ray crystallography, and (during WW II) piezoelectricity.
In the 1920's, he studied noise measurements in diodes and triodes. In
the 1930's, he also took interest in metallurgy and glass science. His
best-known work was done after the war, especially his classic paper on
the effect of a uniform magnetic field on the motion of electrons between
coaxial cylinders. He also invented the magnetron (1921) and the thyratron
(1927), and other electron tubes with wide application as components in
electronic circuits.
January
21: Atomic
submarine
In 1954, the first
atomic submarine, the U.S.S. Nautilus, was launched at Groton, Connecticut.
Nautilus' nuclear propulsion system was a landmark in the history of naval
engineering and submersible craft. All vessels previously known as "submarines"
were in fact only submersible craft. Because of the nuclear power plant,
the Nautilus could stay submerged for months at a time, unlike diesel-fueled
subs, whose engines required vast amounts of oxygen. Nautilus demonstrated
her capabilities in 1958 when she sailed beneath the Arctic icepack to
the North Pole. Scores of nuclear submarines followed Nautilus, replacing
the United States' diesel boat fleet. After patrolling the seas until
1980, the Nautilus is back home at Groton.
January
20: Alexandre-Emile
Beguyer de Chancourtois
(Born January 20,
1820: Died November 14, 1886)
French geologist who was the first to arrange the chemical elements in
order of atomic weights (1862). De Chancourtois plotted the atomic weights
on the surface of a cylinder with a circumference of 16 units, the approximate
atomic weight of oxygen. The resulting helical curve which he called the
telluric helix brought closely related elements onto corresponding points
above or below one another on the cylinder. Thus, he suggested that "the
properties of the elements are the properties of numbers." Although
his publication was significant, it was ignored by chemists as it was
written in the language of geology, and the editors omitted a crucial
explanatory table. It was Dmitry Mendeleyev's table published in 1869
that became most recognized.
January
19: Johann
Elert Bode
(Born January 19,
1747: Died November 23, 1826)
German astronomer best known for his popularization of Bode's law. In
1766, his compatriot Johann Titius had discovered a curious mathematical
relationship in the distances of the planets from the sun. If 4 is added
to each number in the series 0, 3, 6, 12, 24,... and the answers divided
by 10, the resulting sequence gives the distances of the planets in astronomical
units (earth = 1). Also known as the Titius-Bode law, the idea fell into
disrepute after the discovery of Neptune, which does not conform with
the 'law' - nor does Pluto. Bode was director at the Berlin Observatory,
where he published Uranographia (1801), one of the first successful attempts
at mapping all stars visible to the naked eye without any artistic interpretation
of the stellar constellation figures.
January
18: X-ray
machine displayed
In 1896, The first
x-ray machine is exhibited in the U.S. at Casino Chambers, New York City.
For an admission charge of 25 cents, patrons could view the "Parisian
sensation."
January
17: Clyde
W. Tombaugh
(Born February 4,
1906: Died January 17, 1997)
American astronomer who discovered the planet Pluto in 1930, the only
planet discovered in the twentieth century, after a systematic search
instigated by the predictions of other astronomers. Tombaugh was 24 years
of age when he made this discovery at Lowell Observatory in Flagstaff,
Ariz. He also discovered several clusters of stars and galaxies, studied
the apparent distribution of extragalactic nebulae, and made observations
of the surfaces of Mars, Venus, Jupiter, Saturn, and the Moon. Born of
poor farmers, his first telescope was made of parts from worn-out farming
equipment.
January
16: Robert
Jemison Van de Graaff
(Born
December 20, 1901: Died January 16, 1967)
American physicist and inventor of the Van de Graaff generator, a type
of high-voltage electrostatic generator that can be used as a particle
accelerator in atomic research. The potential differences achieved in
modern Van de Graaff generators can be up to 5 MV. It is a principle of
electric fields that charges on a surface can leap off at points where
the curvature is great, that is, where the radius is small. Thus, a dome
of great radius will inhibit the electric discharge and added charge can
reach a high voltage. This generator has been used in medical (such as
high-energy X-ray production) and industrial applications (sterilization
of food). In the 1950s, Van de Graaff invented the insulating core transformer
able to produce high voltage direct current.
January
15: Edward
Teller
(Born: January 15,
1908: Died: September 9, 2003)
Hungarian-born American nuclear physicist who participated in the production
of the first atomic bomb (1945) and who led the development of the world's
first thermonuclear weapon, the hydrogen bomb. After studying in Germany
he left in 1933, going first to London and then to Washington, DC. He
worked on the first atomic reactor, and later working on the first fission
bombs during WW II at Los Alamos. Subsequently, he made a significant
contribution to the development of the fusion bomb. His work led to the
detonation of the first hydrogen bomb (1952). He is sometimes known as
"the father of the H-bomb." Teller's unfavourable evidence in
the Robert Oppenheimer security-clearance hearing lost him some respect
amongst scientists.
January
14: Sergey
Pavlovich Korolev
(Born January 12,
1907: Died January 14, 1966)
Soviet designer of guided missiles, rockets, and spacecraft. He was one
of the founders of Moscow Group for the Study of Reactive Motion. In 1933,
he participated in the Soviet Union's first launch of a liquid-propellant
rocket. Because he was not a member of the Communist Party, he spent much
of his life under house arrest. After demonstrating his expertise in the
modification of captured V2 rockets, Korolev directed the design, testing,
construction, and launching of the Vostok spacecraft, and most of the
U.S.S.R.'s other projects. Around 1958, Korolev argued for the pursuit
of manned space flight instead of military reconnaissance satellites.
After much debate, the Vostok project was approved provided the launch
vehicle could also be useful to the military.
January
13: Wilhelm
Wien
(Born January 13,
1864: Died August 30, 1928)
German physicist who received the Nobel Prize for Physics in 1911 for
his displacement law concerning the radiation emitted by the perfectly
efficient blackbody (a surface that absorbs all radiant energy falling
on it). While studying streams of ionized gas Wien, in 1898, identified
a positive particle equal in mass to the hydrogen atom. Wien, with this
work, laid the foundation of mass spectroscopy. J J Thomson refined Wien's
apparatus and conducted further experiments in 1913 then, after work by
E Rutherford in 1919, Wien's particle was accepted and named the proton.
Wien also made important contributions to the study of cathode rays, X-rays
and canal rays.
January
12: Igor Vasilyevich
Kurchatov
(Born
January 12, 1903: Died February 7, 1960)
Soviet nuclear physicist who from 1932 conducted nuclear science research
in the Soviet Union, during which time his team built a cyclotron, a proton
accelerator and studied artificial radioactivity and neutron-proton interactions.
During WW II, he was chosen as director for the development of his country's
first atomic bomb, detonated August 29, 1949. Meanwhile, in December 1946,
Kurchatov demonstrated a working prototype reactor, though limited to
producing only a few watts and by June 1948, a plutonium production reactor.
He subsequently produced the world's first practical thermonuclear bomb
(1952). Before 1978, the Soviet name for element-104 was kurchatovium
(Ku), though subsquently rutherfordium (Rf) became the accepted name.
January
11: Isidor
Isaac Rabi
(Born July 29, 1898:
Died January 11, 1988)
Isidor Isaac Rabi was American physicist who was awarded the Nobel Prize
for Physics in 1944 for his invention (in 1937) of the atomic and molecular
beam magnetic resonance method of measuring magnetic properties of atoms,
molecules, and atomic nuclei. He spent most of his life at Columbia University
(1929-67), where he performed most of his pioneering research in radar
and the magnetic moment associated with electron spin in the 1930s and
1940s. His Nobel-winning work led to the invention of the laser, the atomic
clock, and diagnostic uses of nuclear magnetic resonance. He originated
the idea for the CERN nuclear research center in Geneva (founded 1954).
January
10: Robert
Woodrow Wilson
(Born:
January 10, 1936)
American radio astronomer who shared, with his coworker Arno Penzias,
the 1978 Nobel Prize for Physics for their discovery of cosmic microwave
background radiation using a microwave horn antenna at Bell Laboratories,
Holmdel, New Jersey. Their discovery in 1964 is now widely interpreted
as being the remnant radiation from the "big bang" model for
the creation of the universe several billion years ago. Wilson is continuing
his astrophysics work with Penzias, looking for interstellar molecules
and determining the relative abundances of interstellar isotopes. (Soviet
physicist Pyotr Leonidovich Kapitsa also shared the Nobel award, for unrelated
research.)
January
9: Caroline
Lucretia Herschel
(Born March 16, 1750: Died January 9, 1848)
German-born British astronomer, sister of Sir William Herschel, who assisted
in his astronomical researches making calculations associated with his
studies. In her own telescope observations, she found three nebulae (1783)
and eight comets (1786-97). In 1787, King George III gave Caroline a salary
of 50 pounds per year as assistant to William. She published the Index
to Flamsteed's Observations of the Fixed Stars and a list of his mistakes
in 1797. At the age of 10 she had been struck with typhus, which subsequently
stunted her growth. She never grew taller than 4' 3" and remained
frail throughout her life.
January
8: Walther
Bothe
(Born
January 8, 1891: Died February 8, 1957)
Walther Wilhelm Georg Bothe was a German physicist who developed the coincidence
method of detecting the emission of electrons by x-rays in which electrons
passing through two adjacent Geiger tubes at almost the same time are
registered as a coincidental event. He used it to show that momentum and
energy are conserved at the atomic level. In 1929 he applied the method
to the study of cosmic rays and was able to show that they consisted of
massive particles rather than photons. This research brought him a share
(with Max Born) in the Nobel Prize for 1954. In 1930, he observed a strange
radiation emitted from beryllium when it was exposed to alpha particles,
later identified by Chadwick as consisting of neutrons. He built Germany's
first cyclotron (1943).
January
7: Josef Stefan
(Born March 24, 1835:
Died January 7, 1893)
Austrian physicist who proposed a law of radiation (1879) stating that
the amount of energy radiated per second from a black body is proportional
to the fourth power of its absolute temperature. (A black body is a theoretical
object that absorbs all radiation that falls on it.) This law is known
as Stefan's law or the Stefan-Bolzmann law. He also studied electricity,
the kinetic theory of gases and hydrodynamics.
January
6: Pavel Alekseyevich
Cherenkov
(Born July 15, 1904:
Died January 6, 1990)
Soviet physicist who discovered Cherenkov radiation (1934), a faint blue
light emitted by electrons passing through a transparent medium when their
speed exceeds the speed of light in that medium. Fellow Soviet scientists
Igor Y. Tamm and Ilya M. Frank investigated the phenomenon from which
the Cherenkov counter was developed. Extensive use of this Cherenkov detector
was later made in applications of experimental nuclear and particle physics.
For their work, the trio shared the 1958 Nobel Prize for Physics. [The
date 15 Jul 1904 Old Style is 28 Jul 1904 New Style]
January
5: Harold
C. Urey
(Born
April 29, 1893: Died January 5, 1981)
American scientist awarded the Nobel Prize for Chemistry in 1934 for his
discovery of deuterium, the heavy form of hydrogen (1932). He was active
in the development of the atomic bomb. He contributed to the growing basis
for the theory of what was widely accepted as the origin of the Earth
and other planets. In 1953, Stanley L. Miller and Urey simulated the effect
of lightning in the prebiotic atmosphere of Earth with an electrical discharge
in a mixture of hydrogen, methane, ammonia, and water. This produced a
rich mixture of aldehydes and carboxylic and amino acids (as found in
proteins, adenine and other nucleic acid bases). Urey calculated the temperature
of ancient oceans from the amount of certain isotopes in fossil shells.
January
4: Erwin Schrödinger
(Born August 12, 1887:
Died January 4, 1961)
Austrian theoretical physicist who extended the theory of de Broglie waves
to describe the structure of the atom, validating the wave theory of matter
and contributing fundamentals of quantum mechanics. For his work, he was
awarded a shared of the 1933 Nobel Prize for Physics with the British
physicist P.A.M. Dirac.
January
3: Charles
Augustus Young
(Born December 15,
1834: Died January 3, 1908)
American astronomer who made the first observations of the flash spectrum
of the Sun, proved the gaseous nature of the sun's corona and discovered
the reversing layer of the solar atmosphere. He was a pioneer in the study
of the spectrum of the sun and experimented in photographing solar prominences
in full sunlight. On December 22, 1870 at the eclipse in Spain, he saw
the lines of the solar spectrum all become bright for perhaps a second
and a half (the "flash spectrum") and announced the "reversing
layer." By exploring from the high altitude of Sherman, Wy. (1872),
he more than doubled the number of bright lines he had observed in the
chromosphere, By a comparison of observations, he concluded that magnetic
conditions on the earth respond to solar disturbances.
January
2: Dixy Lee
Ray
(Born September 3, 1914: Died January 2, 1994)
(Margaret Ray) American marine biologist whose interests extended to the
environment and the need for greater public understanding of science.
A year after appointment
to the Atomic Energy Commission, she became its first female chair (1973-75)
and championed nuclear power
plant construction. On November 2, 1976 Ray won election as
the first woman to be governor of Washington state. In her single term
as governor, Ray generated more controversy than accomplishments, advocating
reductions in environmental protections, and supporting nuclear power.
She feuded with aides and refused to close the Hanford nuclear dump. She
was featured on the cover of Time issue of December 12, 1977.
January
1: Harriet
Brooks
(Born
January 1, 1876: Died April 17, 1933)
Canadian nuclear physicist who was probably the first to observe the recoil
of the atomic nucleus as nuclear particles were emitted during radioactive
decay. During the years 1901-05, she contributed much to the new science
of radioactivity. Working with Rutherford, she measured the rate at which
radium released radon (and other gases) into the air. They demonstrated
that the diffusion of the emanations of radium both behaved like a a gas,
and that this gas had a high (over 100) molecular weight. Rutherford credited
her work identifying the release of radon as crucial to developing his
theory of the transmutation of one element into another. She died at the
age of 56, from leukemia or a like disease related to radiation exposure.
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