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Physics of antimatter-matter reactions for interstellar propulsion
At the stage of the antiproton-nucleon annihilation chain of events relevant to propulsion the annihilation produces energetic charged pions and gamma rays. If annihilation occurs in a complex nucleus, protons, neutrons, and other nuclear fragments are also produced. The charge, number, and energy of the annihilation products are such that annihilation rocket engine concepts involving relatively low specific impulse (I/sub sp/ approx. = 1000 to 2000 s) and very high I/sub sp/ (3 x 10/sup 7/ s) appear feasible and have efficiencies on the order of 50% for annihilation energy to propulsion energy conversion. At I/sub sp/'s of around 15,000 s, however, it may be that only the kinetic energy of the charged nuclear fragments can be utilized for propulsion in engines of ordinary size. An estimate of this kinetic energy was made from known pieces of experimental and theoretical information. Its value is about 10% of the annihilation energy. Control over the mean penetration depth of protons into matter prior to annihilation is necessary so that annihilation occurs in the proper region within the engine. Control is possible by varying the antiproton kinetic energy to obtain a suitable annihilation cross section. The annihilation cross section at low energies is …
Date:
August 22, 1986
Creator:
Morgan, D.L. Jr.
Object Type:
Article
System:
The UNT Digital Library
Numerical solution of the Schroedinger integral equation for dt. mu. Progress report
The Schroedinger Integral Equation is derived for an N-body system, and solutions for required Green's functions are obtained. The initial method of numerical solution has yielded the correct ground states and lower excited states of He (test case) and dt..mu... Steps are being taken to improve the numerical accuracy.
Date:
August 22, 1986
Creator:
Morgan, D.L. Jr.
Object Type:
Report
System:
The UNT Digital Library
Dispersive effects of transverse magnet displacements in rolled arc achromats
The effect of transverse displacements of combined function magnets is investigated where the disperion in not matched due to roll. This dispersion function is perturbed by displacement of combined function magnets either singly or coherently. In the latter case the effect of a systematic (or DC) offset of magnets is examined. This type of error can occur due to systematics in the placement or the readout of Beam Position Monitors or equivalently by correcting the orbit of a beam of the wrong momentum with respect to the Arc magnet excitation. 5 refs., 18 figs.
Date:
September 22, 1986
Creator:
Fieguth, T.; Kheifets, S. & Murray, J. J.
Object Type:
Report
System:
The UNT Digital Library
Antiproton-hydrogen atom rearrangement-annihilation cross section
For antiproton energies of several eV or less, annihilation in matter occurs through atomic rearrangement processes in which the antiproton becomes bound to a nucleus prior to annihilation. Existing calculations of the antiproton-hydrogen atom rearrangement cross section are semiclassical and employ the Born-Oppenheimer approximation. They also employ various arguments in regard to the behavior of the system when the Born-Oppenheimer approximation breaks down at small antiproton-proton separations. These arguments indicate that rearrangement is essentially irreversible. In the present study, a detailed investigation was made of the antiproton-hydrogen atom system when the Born-Oppenheimer approximation breaks down. The results of this study indicate that the previous arguments were approximately correct, but that there is a significant probability for rearrangement reversing prior to annihilation. This probability is estimated to be about 20%. 8 refs., 4 figs., 2 tabs.
Date:
August 22, 1986
Creator:
Morgan, D.L. Jr.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0149.0581]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Putnam City West graduate Mark Crow, second from right, shows Bethany Village nursing home resident Haidee Smith his award-winning poster, titled "Still Living, Learning and Loving," as art teacher Linda Cain watch."
Date:
May 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0154.0232]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Darby Davis offers Councilman Chuck Stith a soft drink."
Date:
July 22, 1986
Creator:
Howell, Paul S.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0173]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Lynn Cowan, Taco Bueno marketing executive from Dallas says Oklahomans are among America's top consumers of fast food, and Taco Bueno is getting its share of the business."
Date:
April 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0019]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "William Conroe and Lorrie Keller call class to order."
Date:
February 22, 1986
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0354.0124]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Looking over jewelry are from left John Pinkerton, Kurt Leichter and Jack Davis."
Date:
October 22, 1986
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Electron impact ionization of heavy ions: some surprises
This paper reports the results of calculations of electron impact ionization cross sections for a variety of heavy ions using a distorted wave Born-exchange approximation. The target is described by a Hartree-Fock wavefunction. The scattering matrix element is represented by a triple partial wave expansion over incident, scattered, and ejected (originally bound) continuum states. These partial waves are computed in the potentials associated with the initial target (incident and scattered waves) and the residual ion (ejected waves). A Gauss integration was performed over the distribution of energy between the two final state continuum electrons. For ionization of closed d- and f-subshells, the ejected f-waves were computed in frozen-core term-dependent Hartree-Fock potentials, which include the strong repulsive contribution in singlet terms which arises from the interaction of an excited orbital with an almost closed shell. Ground state correlation was included in some calculations of ionization of d/sup 10/ subshells.
Date:
August 22, 1986
Creator:
Younger, S.M.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0262.0065]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jimmy Hiner of Coweta, OK, wrestles his steer to the sod Friday night."
Date:
March 22, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0229.0439]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 22, 1986
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0041]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Stunt man Dan Koko is yanked off a motorcycle as it explodes as part of a stunt to raise money for children who need organ transplants."
Date:
August 22, 1986
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0251.0742]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Gary Hart, Sen."
Date:
June 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0251.0807]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Sen. Gary Hart"
Date:
June 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0261.0178]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Work is progressing on the first phase of a widening project on U.S. Highway 59 in Poteau."
Date:
August 22, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0253.0550]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
August 22, 1986
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0251.0745]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Gary Hart"
Date:
June 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0228.0268]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Don Green is an ace when it comes to making holes-in-one / Edmond Golfer."
Date:
March 22, 1986
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0228.0267]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Don Green / two holes-in-one march 21st 1986 / Oak Tree Golf Club."
Date:
March 22, 1986
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0225.0282]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "John B. Gordon of Moore, calling himself a "consumer victim," speaker out against utility rate hikes during a public hearing Wednesday before a House committee meeting to investigate some alternatives."
Date:
January 22, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0270.0426]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Billy Hughey checks prototype and proof sheet of the Rainbow Study Bible."
Date:
April 22, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0257.0408]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 22, 1986
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0309B.0329]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Cowboy right tackle Leonard Jackson holds on to Cyclone QB Alex Espinoza Saturday."
Date:
November 22, 1986
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History