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Abrupt change in a quantum particle's angular momentum
only certain discrete values. Rotational transition thus corresponds to transition of the molecule from one rotational energy level to the other through
Rotational_transition
Spectroscopy of quantized rotational states of gases
rotational states of molecules in the gas phase. The rotational spectrum (power spectral density vs. rotational frequency) of polar molecules can be measured
Rotational_spectroscopy
Branch of molecular spectroscopy
For a given vibrational transition, the same theoretical treatment as for pure rotational spectroscopy gives the rotational quantum numbers, energy levels
Rotational–vibrational spectroscopy
Rotational–vibrational_spectroscopy
Type of structure in atomic physics
in HCN rotational transitions. The dipole selection rules for HCN hyperfine structure transitions are ΔJ=1, ΔF={0,±1}, where J is the rotational quantum
Hyperfine_structure
Formal constraint in quantum mechanics
rule for rotational transitions, derived from the symmetries of the rotational wave functions in a rigid rotor, is ΔJ = ±1, where J is a rotational quantum
Selection_rule
transition that can give rise to absorption of electromagnetic radiation: Rotational transitions, in which the molecule gains a quantum of rotational
Electromagnetic absorption by water
Electromagnetic_absorption_by_water
Form of spectroscopy employed in physics, chemistry, biology, and other fields
probability of inducing some vibrational (or rotational) transition, as opposed to inducing a direct transition through absorption. This makes the molecule
Stimulated_Raman_spectroscopy
Different states of quantum systems
A vibrational and rotational transition may be combined by rovibrational coupling. In rovibronic coupling, electron transitions are simultaneously combined
Energy_level
Range on the electromagnetic spectrum
part of the spectrum, at wavelengths of around 1-30 micrometres. Rotational transitions take place in the far infrared and microwave regions. Absorption
Absorption_band
Chemical compound
molecules that are not as easily detected (such as N2). Its 1–0 rotational transition occurs at 93.174 GHz, a region of the spectrum where Earth's atmosphere
Diazenylium
Model of rotating physical systems
can be used in quantum mechanics to predict the rotational energy of a diatomic molecule. The rotational energy depends on the moment of inertia for the
Rigid_rotor
Chemical compound
frequencies differ. The frequency of the astronomically important J = 1-0 rotational transition of HD at 2.7 THz has been measured with tunable FIR radiation with
Hydrogen_deuteride
Chemical detected in space
Formaldehyde (H2CO) was detected by means of the 111 - 110 ground state rotational transition at 4830 MHz. On 11 August 2014, astronomers released studies, using
Interstellar_formaldehyde
Chemical compound
findings and also made the spectrograph famous. In 1970, •CN's first rotational transition from J = 0 to J = 1 was detected In the Orion Nebula and the W51
Cyano_radical
Inelastic scattering of photons by matter
specific selection rules state that the allowed rotational transitions are ΔJ=±2, where J is the rotational state. This generally is only relevant to molecules
Raman_scattering
Study of simultaneous change in atoms' electronic and vibration energy
appropriate energy. In the gas phase, vibronic transitions are also accompanied by changes in rotational energy. Vibronic spectra of diatomic molecules
Vibronic_spectroscopy
Device for producing coherent EM waves in the sub-visible spectrum
the radio universe. Some water masers also emit radiation from a rotational transition at a frequency of 96 GHz. Extremely powerful masers, associated
Maser
Form of gas laser
(GW). Because the laser transitions are actually on vibration-rotation bands of a linear triatomic molecule, the rotational structure of the P and R
Carbon-dioxide_laser
Galaxy in the constellation Leo
galaxy also shows detections of dust continuum, J = 4-3 ground rotational transition of carbon monoxide (CO) and atomic carbon. It has a compact radio
IRAS_10565+2448
Variable star in the constellation Andromeda
its red giant envelope into space. Line emission from the 115 GHz rotational transition of carbon monoxide was detected in 1986 by Benjamin Zuckerman et
W_Andromedae
Chemical compound
simultaneous change in the rotational state of the molecules. Because of quantum mechanical selection rules, only certain rotational transitions are permitted. The
Hydrogen_chloride
Shift from high to low birth rates
Demographic transition is a phenomenon and theory in the social sciences (especially demography) referring to the historical shift from high to low rates
Demographic_transition
Differential rotation of the Sun
Solar rotation is the rotation of the Sun about its own axis. The Sun is not a solid body, but is composed of a gaseous plasma, and different latitudes
Solar_rotation
Family of organic compounds
This is commonly done with measurement of the rotational constant, the energy of the rotational transitions, or a measurement of the dissociation energy
Cyanopolyyne
Molecule composed of any two atoms
three categories: the translational, rotational, and vibrational energies. The theoretical study of the rotational energy levels of the diatomic molecules
Diatomic_molecule
Gaseous phase of water
Retrieved October 19, 2017. Tennyson, Jonathan (2014). "Vibration–rotation transition dipoles from first principles". Journal of Molecular Spectroscopy
Water_vapor
Symmetry of molecules of chemical compounds
(running vertically in the image) then further 2-fold rotational axes at right angles to the main rotational axis are obvious. One of the molecular 2-fold axes
Molecular_symmetry
Reversible transition in amorphous materials
mode-coupling theory for the glass transition predicted, for hard ellipsoids, an orientational, or rotational, glass transition in which particle orientations
Glass_transition
System of grazing moving animals between paddocks around the year
Healing native rangeland may require a combination of burning and rotational grazing. Rotational grazing can be used with ruminants such as cattle, sheep or
Rotational_grazing
Chemical compound
telescope was able to observe the rotational frequencies of PO. ARO's 10 m SMT was able to measure the rotational transitions of PO showing J=5.5→4.5 at 240 GHz
Phosphorus_monoxide
Chemical compound
such as ethanimines because its internal energy transition, more specifically the rotational transition is within the radio frequency of 14085 MHz = 140
Ethanimine
Chemical compound
atmospheric windows. The J=1→0, J=3→2, J= 4→3, and J=10→9 pure rotational transitions have all been observed. HCN is formed in interstellar clouds through
Hydrogen_cyanide
Hydrocarbon compound
(vibronic) state exhibits a simple rigid rotor-type rotational spectrum. However, each rotational state exhibits fine and hyperfine structure, due to
Ethynyl_radical
Formaldehyde was detected by means of the 111 - 110 ground state rotational transition at 4830 MHz. 1970 Reverse transcriptase In biochemistry, a reverse
Timeline of United States discoveries
Timeline_of_United_States_discoveries
Chemical compound
have spectral lines for various rotational transition for the following vibrational levels. The infrared vibration rotation bands are in the range 800–2200 cm−1
Magnesium_monohydride
Bipolar planetary nebula
examining microwave emission-line spectra from carbon monoxide rotational transitions. These spectra show two distinct velocity components. The narrow
Westbrook_Nebula
Device that emits light via optical amplification
(November 30, 1964). "Continuous-Wave Laser Action on Vibrational-Rotational Transitions of CO2". Physical Review. 136 (5A): A1187–A1193. doi:10.1103/physrev
Laser
Class of molecular symmetry
mix the rotational levels of g and u vibronic states of homonuclear diatomic molecules giving rise to pure rotational (ortho - para) transitions in a homonuclear
Symmetry of diatomic molecules
Symmetry_of_diatomic_molecules
Molecular ion
laser cooling, the rotational and vibrational transitions can be investigated in extremely fine detail. The corresponding transition frequencies can be
Dihydrogen_cation
Various molecular structures formed only by rotation about single bonds
term is usually k = 3 {\displaystyle k=3} , reflecting the threefold rotational symmetry. Higher terms may be included for precision where steric effects
Rotamer
Periodic motion of the atoms of a molecule
provides a third rotational coordinate. The number of vibrational modes is therefore 3N minus the number of translational and rotational degrees of freedom
Molecular_vibration
Spectral line splitting in electrical field
first-order Stark effect. The first-order Stark effect occurs in rotational transitions of symmetric top molecules (but not for linear and asymmetric molecules)
Stark_effect
Astronomical radio interferometer in Hawaii, USA
telescope range from 194–408 gigahertz (1.545–0.735 mm) which includes rotational transitions of dozens of molecular species as well as continuum emission from
Submillimeter_Array
Chemical element with atomic number 6 (C)
mechanism that powers stars, wherein carbon operates as a catalyst. Rotational transitions of various isotopic forms of carbon monoxide (for example, 12CO
Carbon
Period of Chinese history (1618–1683)
The transition from Ming to Qing, also known as the Manchu conquest of China or Ming–Qing transition, was a decades-long period of conflict between the
Transition_from_Ming_to_Qing
Study of the physical and chemical properties of molecules
vibrational spectra show transitions in the near infrared (about 1–5 μm). Finally, rotational energy states describe semi-rigid rotation of the entire molecule
Molecular_physics
American chemist
Jane Blankenship Gibson as an example. Rotational Analysis of the 0-0 Band of the B2 Σ U -> X2 Σ g Transition of N+ 2 from Shock Tube Spectra. Gibson
Jane_Blankenship
Tool measuring EM radiation at 0.3–300-GHz frequency
dipole transitions) around 60 GHz which is used to derive temperature profiles or the water vapor absorption line around 22.235 GHz (dipole rotational transition)
Microwave_radiometer
Neutral form of the hydroxide ion
medium since 1963 through its 18-cm transitions. In the subsequent years, HO• was observed by its rotational transitions at far-infrared wavelengths, mainly
Hydroxyl_radical
SI unit of time
Earth's rotation, and they continue to set the standard today. A mechanical clock, which does not depend on measuring the relative rotational position
Second
Hypothesized entity in outer space
if the total angular momentum is greater than the co-rotational limit. Beyond the co-rotational limit, the velocity at the equator of a body would exceed
Synestia
electronic degrees of freedom in a molecule. When a rovibronic transition occurs, the rotational, vibrational, and electronic states change simultaneously
Rovibronic_coupling
Indian physics professor (1933-2011)
the field of microwave spectroscopy. He was the first to observe rotational transition in hydrogen bounded molecules. His other assignments included work
Ganesh_Prasad_Srivastava
motion Rotational diffusion Rotational energy Rotational invariance Rotational motion Rotational speed Rotational temperature Rotational transition Rotational–vibrational
Index_of_physics_articles_(R)
Timekeeping system on Earth relative to the celestial sphere
the coin rotation paradox. Earth's rotation is not a simple rotation around an axis that remains always parallel to itself. Earth's rotational axis itself
Sidereal_time
Physical phenomenon
can also probe transitions—such as pure rotational transitions of non-polar molecules—that are inaccessible to conventional rotational spectroscopy. Inelastic
Neutron_scattering
Star in the constellation Camelopardalis
its red giant envelope into space. Line emission from the 115 GHz rotational transition of carbon monoxide was detected in 1987 by Olofson et al. The width
ST_Camelopardalis
Symmetry of spatially mirrored systems
Hamiltonian can mix the rotational levels of g and u vibronic states (called ortho-para mixing) and give rise to ortho-para transitions In atomic nuclei, the
Parity_(physics)
Technique used by employers
Job rotation is the lateral transfer of employees between jobs in an organization without a change in their hierarchical rank or salary grade. Rotated
Job_rotation
In rotational-vibrational and electronic spectroscopy of diatomic molecules, Hund's coupling cases are idealized descriptions of rotational states in which
Hund's_cases
Atmospheric window
of the infrared atmospheric window together with absorption by rotational transitions of H 2O at slightly longer wavelengths. The short wavelength boundary
Infrared_window
Gravitational process studied in astronomy
nearby zero extinction area of sky), continuum dust emission and rotational transitions of CO and other molecules; these last two are observed in the millimeter
Star_formation
duration of 9 192 631 770 cycles of a particular hyperfine structure transition in the ground state of caesium-133 (133Cs). For practical usability a
Astronomical_time
Variable star in the constellation Aquarius
extended CSE began in 1984, when a spectral line arising from a rotational transition of carbon monoxide (CO) was detected by Zuckerman and Dyck, using
EP_Aquarii
Submarine nuclear regulator
Navy submarines stationed at HMAS Stirling on a rotational basis under the name Submarine Rotational Force – West (SRF-West). Australia portal Nuclear
Australian_Submarine_Agency
Physical magneto-optical phenomenon
The Faraday effect or Faraday rotation, sometimes referred to as the magneto-optic Faraday effect (MOFE), is a physical magneto-optical phenomenon. The
Faraday_effect
Interaction of light with material waves in a medium
scattering, photons are scattered by the effect of vibrational and rotational transitions in the bonds between first-order neighboring atoms, while Brillouin
Brillouin_scattering
German physicist and chemist (1887–1941)
cathode, at the University of Berlin in 1918. Her thesis dealt with rotational transition and rotary dispersion. After finishing her doctorate, Wreschner
Marie_Wreschner
Agricultural practice of changing crops
Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons. This practice reduces
Crop_rotation
Government structure and democratic principle
"disproportionate dominance" over the state and enacting authoritarianism. Peaceful transition of power Democratic backsliding Term limit Two-term limit Dominant-party
Rotation_of_power
Transition from solid to gas without melting
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the intermediate liquid state. The verb
Sublimation
State where a planet's atmosphere rotates faster than the planet itself
Rossby waves is thought to contribute significantly to its rapid super-rotational winds. Similarly, in Earth's atmosphere, Kelvin waves generate eastward
Atmospheric_super-rotation
Class of chemical compounds
nature due to the immense stability of the +3 oxidation state. Rotational transitions of AlF and AlCl have been detected in circumstellar shells near
Aluminium(I)_compounds
Intensive quantity, heat capacity per amount of substance
very light molecule such as hydrogen the rotational energy levels will be spaced so widely that rotational heat capacity may not completely "unfreeze"
Molar_heat_capacity
Military unit
rotational basis for about six months to conduct exercises and train with the Australian Defence Force in the Northern Territory. The first rotation of
Marine Rotational Force – Darwin
Marine_Rotational_Force_–_Darwin
Fluid flow revolving around an axis of rotation
Use of circular rotational force to mimic gravity Batchelor vortex Biot–Savart law – Law of classical electromagnetism Coordinate rotation – Motion of a
Vortex
Chemical compound
Recently, the pure rotational spectrum of HCNH+ was measured again in order to more precisely determine the molecular rotational constants B and D. According
Protonated_hydrogen_cyanide
Diagram of the electronic states of a molecule
rotational energy levels. The changes between these levels are called "transitions" and are plotted on the Jablonski diagram. Radiative transitions involve
Jablonski_diagram
Spectroscopic technique
typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed. Raman spectroscopy
Raman_spectroscopy
Chemical compound
2→1). These lines are due to the isotopolog 36Ar1H+ undergoing rotational transitions. The lines have been detected in the direction of the galactic centre
Argonium
Affect on molecular properties due to spatial arrangement of electron orbitals
heating conditions can have two products: inward and outward rotation. The inward rotation transition state of the structure shown below is relatively favored
Stereoelectronic_effect
(17 & 18 Geo. 5. c. 42) and Revision of the Army and Air Force Acts (Transitional Provisions) Act 1955 (3 & 4 Eliz. 2. c. 20)) Development and Road Improvement
List of acts of the Parliament of the United Kingdom from 1910
List_of_acts_of_the_Parliament_of_the_United_Kingdom_from_1910
Indian-American electrical engineer
Jersey. Patel's discovery of the laser action in 1963 on the rotational–vibrational transitions of carbon dioxide and his discovery in 1964 of efficient vibrational
C._Kumar_N._Patel
Quantum mechanical effect
this effect. The lines arise from rotational transitions of molecules, say J=1 to J=0, where J is the rotational quantum number. If the magnetic sublevels
Goldreich-Kylafis_effect
Rotational self-propulsion of organisms
least once in history. There exist two distinct modes of locomotion using rotation: first, simple rolling; and second, the use of wheels or propellers, which
Rotating locomotion in living systems
Rotating_locomotion_in_living_systems
Spin states of hydrogen
the possible rotational states of the two forms of H 2. Orthohydrogen, with symmetric nuclear spin functions, can only have rotational wavefunctions
Spin_isomers_of_hydrogen
cosmological tracers include: Rotational transitions in molecules, such as carbon monoxide Fine structure transitions from species such as ionized carbon
Intensity_mapping
One trillionth of a second
the world's fastest transistor (845 GHz, as of 2006) 1.7 picoseconds – rotational correlation time of water 3.3 picoseconds (approximately) – time taken
Picosecond
Protoplanetary nebula
confirmed. The Egg Nebula shows strong microwave emission from rotational transitions of carbon monoxide (CO) and hydrogen cyanide (HCN). The presence
Egg_Nebula
Four-dimensional number system
corresponding to the double cover of the rotational symmetry group of the regular icosahedron. The double cover of the rotational symmetry group of the regular octahedron
Quaternion
subsidiary or office. This form of job rotation assignment is further increasing due to globalisation. In rotational assignments, workers have a set time
International_assignment
Presence/absence of symmetry or correlation in a many-particle system
transition, loss of magnetic order. The degree of freedom that is ordered or disordered can be translational (crystalline ordering), rotational (ferroelectric
Order_and_disorder
Decommissioned radio telescope in Hawaii, US
Phillips, T. G.; Neufeld, D. A. (1990). "A New Submillimeter Water Maser Transition at 325 GHz". Astrophysical Journal Letters. 363: L27–L31. Bibcode:1990ApJ
Caltech Submillimeter Observatory
Caltech_Submillimeter_Observatory
Australian physicist and astronomer
Constraints on the Proton-To-Electron Mass Ratio from Observations of Rotational Transitions of Methanol". The Astrophysical Journal. 747 (1): L7. arXiv:1201
Simon_Ellingsen
Chemical compound
distant astronomical regions can be identified based on their unique rotational transitions, of which the corresponding microwave frequencies are detectable
Sulfur_mononitride
between the plane containing Earth's rotational axis and the zenith, and the plane containing Earth's rotational axis and the object of interest. Analogous
Glossary_of_astronomy
Reversal of direction of Earth's magnetic field
of a polarity transition are between 1,000 and 10,000 years, but some estimates are as quick as a human lifetime. During a transition, the magnetic field
Geomagnetic_reversal
and those who perform the sacred duties assigned to them, by turns in rotation after them at this temple, those supervising the Māhesvaras, the residents
Tamil inscriptions in Sri Lanka
Tamil_inscriptions_in_Sri_Lanka
Star-forming galaxy in the constellation Sextans
constellation of Sextans. It was first detected in spectroscopic data on rotational transitions of carbon monoxide obtained using the Atacama Large Millimeter Array
3MM-1
Chemical compound
small CnS2 clusters have been detected in interstellar medium. The rotational transitions of these molecular carbon sulfides matched with the corresponding
Carbon_subsulfide
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