Zobrazeno 1 - 10
of 277
pro vyhledávání: '"R. R. Spencer"'
Autor:
R. R. Spencer, R. J. Cripps
Publikováno v:
International Journal of Mechanical Engineering Education. 32:300-314
We describe the CAL-based training for CADCAM designed specifically to teach level-2 undergraduate mechanical and manufacturing engineers the fundamentals of computer-based design and manufacture of three-dimensional components. The work has been ong
Autor:
R. R. Spencer, Jingyu Huang
Publikováno v:
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing. 50:675-684
This paper explores the design of analog front ends (AFEs) for a 1000BASE-T receiver. We consider having the AFE perform partial equalization or partial echo cancellation in addition to the required low-pass filtering function. Different architecture
Publikováno v:
Journal of Nuclear Science and Technology. 39:88-91
We have evaluated 16O neutron cross sections in the resolved resonance region with the multilevel Reich-Moore code SAMMY. Resonance parameters were determined by a consistent analysis, including both Doppler and resolution broadening effects. To prop
Autor:
John A. Harvey, Timothy E. Valentine, Herve Derrien, R. O. Sayer, R. R. Spencer, P. E. Koehler, Klaus H Guber, Luiz C Leal
Publikováno v:
Journal of Nuclear Science and Technology. 39:346-349
The Oak Ridge Electron Linear Accelerator (ORELA) was used to measure neutron total and capture cross sections of aluminium, natural chlorine and silicon in the energy range from 100 eV to ~600 keV. ORELA is the only high power white neutron source w
Autor:
Luiz C Leal, Herve Derrien, D. E. Pierce, P. E. Koehler, R. O. Sayer, T. A. Lewis, V.M. Cauley, Timothy E. Valentine, Klaus H Guber, R. R. Spencer, John A. Harvey
Publikováno v:
Nuclear Science and Engineering. 139:111-117
For the first time, high-resolution transmission data of {sup 233}U have been obtained using a cooled sample. The samples were cooled to T = 11 K using a cryogenic device, which reduced the Doppler broadening of resonances by 50% compared to room-tem
Autor:
Klaus H Guber, G. Dos Santos, R. R. Spencer, John A. Harvey, D. C. Larson, N. W. Hill, Luiz C Leal, R. O. Sayer
Publikováno v:
Nuclear Science and Engineering. 135:141-149
In support of the U.S. Department of Energy need for new data for criticality safety applications, new high-resolution fission cross-section measurements of 233U have been made at the Oak Ridge Ele...
Autor:
D. E. Pierce, P. E. Koehler, John A. Harvey, Michael Scott Smith, N. W. Hill, Klaus H Guber, R. R. Winters, Jeffery C. Blackmon, R. R. Spencer, D. W. Bardayan, D. C. Larson, Subramanian Raman, T. A. Lewis
Publikováno v:
Physical Review C. 57:R1558-R1561
We have made improved measurements of the neutron capture and total cross sections for {sup 137}Ba over a sufficiently wide range of energies so that the reaction rate at s-process temperatures (kT=6{endash}23 keV) can be determined solely from the d
Autor:
John A. Harvey, R. R. Spencer, Michael Scott Smith, N. W. Hill, R. R. Winters, P. E. Koehler, Klaus H Guber
Publikováno v:
Nuclear Physics A. 621:258-261
We have made high-resolution neutron capture and transmission measurements on isotopically enriched samples of 134 Ba and 136 Ba at the Oak Ridge Electron Linear Accelerator (ORELA) in the energy range from 20 eV to 500 keV. Previous measurements had
Publikováno v:
Nuclear Physics A. 621:254-257
We have implemented a 4π BaF 2 detector system at the Oak Ridge Electron Linear Accelerator (ORELA) for making (n,γ) measurements of interest to nuclear astrophysics. This new detector will allow us to work with smaller samples and to avoid potenti
Publikováno v:
Nuclear Physics A. 621:266-269
We have completed measurements of the 142,144 Nd(n,γ) cross sections from approximately 20 eV to 200 keV at the Oak Ridge Electron Linear Accelerator (ORELA) using a recently improved C 6 D 6 detector apparatus. 142 Nd is an s -only isotope, i.e. it