Zobrazeno 1 - 10
of 35
pro vyhledávání: '"G.A. Needham"'
Autor:
T.D. Ford, G.A. Needham, J. L. Drummond, F. P. Brady, C.M. Castaneda, D. J. Millener, D. S. Sorenson, B. McEachern, E. Hjort, N.S.P. King, J. L. Romero
Publikováno v:
Physical Review C. 43:2284-2302
The {sup 12}C({ital n},{ital p}){sup 12}B reaction has been studied at 60 and 65 MeV. Cross sections for the 1{sup +} ground state, the 2{sup +} first excited state at 0.95 MeV, an unresolved pair of 2{sup {minus}} and 4{sup {minus}} states at 4.4 Me
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 301:241-245
Measurements are reported for the light output response on a NaI(T1) detector for protons, deuterons, and tritons with energies between 30 and 60 MeV. The stopping power region covered by this data overlaps previous data taken with electrons and prot
Autor:
T. S. Subramanian, F. P. Brady, C.I. Zanelli, G.A. Needham, C.M. Castaneda, J. L. Ullmann, J. L. Romero
Publikováno v:
Nuclear Instruments and Methods. 171:609-612
Relative measurements of electron capture probabilities for protons of 42.5 and 61.8 MeV are presented. Attention is drawn to some uses of the resulting beam in a 0° neutron beam facility.
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 228:81-88
A large solid angle, high counting rate detection system for p, d t identification and energy measurement in the range of 15 to 65 MeV has been developed. The detector consists of two position-sensitive delay-line multiwire chambers, a thin plastic s
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 228:89-93
A new type of detector for measuring neutron flux and energy over a wide range of angles and energies is being developed. Measurements of neutron elastic and inelastic scattering as well as neutron energy continua are possible. Time-of-flight is not
Autor:
D. H. Fitzgerald, J. L. Romero, C.M. Castaneda, F. P. Brady, G.A. Needham, Nicholas S. P. King, J. L. Ullmann
Publikováno v:
Nuclear Physics A. 386:179-188
The parent analog of the giant dipole resonance in 28 Si is studied by means of the (n, p) reaction. The continuum contribution to the giant dipole region was estimated by a phenomenological parameterization. The observed cross section exhausts 31% o
Publikováno v:
Journal of Neuroscience Methods. 7:281-288
A method is described for making small (2–6 μl) localized intracerebral drug injections in the conscious monkey. A base plate and guide cannula are initially secured to the skull under general anaesthesia. A mechanical pump containing the drug sol
Autor:
G.A. Needham, J.L. Ullman, F. P. Brady, D.L. Johnson, P.P. Urone, J. L. Romero, C.I. Zanelli, M.L. Johnson
Publikováno v:
Nuclear Instruments and Methods. 178:427-436
A method for measuring neutron non-elastic cross sections at medium energies is described. The method uses a relatively thick target and a large solid angle neutron detector which intercepts most of the elastically scattered neutrons. The non-elastic
Autor:
J. L. Ullmann, J. L. Romero, P.P. Urone, M.L. Johnson, D.L. Johnson, G.A. Needham, F. P. Brady, C.I. Zanelli
Publikováno v:
Physical Review C. 23:1015-1022
Neutron total non-elastic cross sections have been obtained from transmission measurements of 40.3 and 50.4 MeV neutrons on C, O, Ca, and Fe. The results agree within error bars with proton data on the same nuclei. The data are well represented by th
Autor:
D. J. Brenner, G.A. Needham, J. L. Romero, C.I. Zanelli, F. P. Brady, D. H. Fitzgerald, J. W. Watson, Richard E. Prael, J. L. Ullmann, R. Garrett, T. S. Subramanian
Publikováno v:
Physical Review C. 28:521-528
Double differential cross sections for the neutron-induced production of p, d, t, $^{3}\mathrm{He}$, and alpha particles from carbon have been measured using unpolarized neutrons. Neutron beam energies of 27.4, 39.7, and 60.7 MeV were used. The charg