scholarly journals Young Pulsars – Pulsed Neutron Sources

1971 ◽  
Vol 46 ◽  
pp. 384-385
Author(s):  
J. Truemper
Keyword(s):  
Neutron Flux ◽  
Crab Pulsar ◽  
Neutron Sources ◽  
High Energies ◽  
Vela Pulsar ◽  
Pulsed Neutron ◽  
Very High

The prospects of observing a pulsed neutron flux at very high energies from pulsars are discussed. Most likely candidates are the Vela pulsar at 2 × 1016 eV and the Crab Pulsar at 1017 eV.

Topological cross sections in hadron-nucleon and hadron-nucleus collisions at very high energies

1983 ◽  
Vol 399 (2) ◽  
pp. 515-528 ◽  
Author(s):  
H.J. Pirner ◽  
W.Q. Chao ◽  
M.K. Hegab
Keyword(s):  
Cross Sections ◽  
High Energies ◽  
Very High

ELASTIC SCATTERING WITH THE LIPATOV POMERON

1992 ◽  
Vol 07 (26) ◽  
pp. 2415-2421 ◽  
Author(s):  
A. P. CONTOGOURIS ◽  
F. LEBESSIS
Keyword(s):  
Asymptotic Behavior ◽  
Elastic Scattering ◽  
Specific Model ◽  
Scattering Data ◽  
High Energies ◽  
Very High

First a unitarization procedure for an amplitude with the asymptotic behavior of the Lipatov Pomeron is presented; it amounts to its iteration along the s-channel. Next, based on this procedure, a specific model is considered and applied to the description of elastic scattering data at very high energies; it is shown that it leads to a fair description of them.

Pion exchange in inclusive neutron production at very high energies

1976 ◽  
Vol 16 (4) ◽  
pp. 97-101 ◽  
Author(s):  
E. Ferrari ◽  
M. Lusignoli ◽  
Y. Srivastava
Keyword(s):  
Neutron Production ◽  
Pion Exchange ◽  
High Energies ◽  
Very High

Small-angle proton-proton elastic scattering at very high energies (460 GeV2 < s < 2900 GeV2)

1972 ◽  
Vol 39 (5) ◽  
pp. 663-667 ◽  
Author(s):  
G. Barbiellini ◽  
M. Bozzo ◽  
P. Darriulat ◽  
G.Diambrini Palazzi ◽  
G. De Zorzi ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Small Angle ◽  
Proton Proton ◽  
High Energies ◽  
Proton Elastic Scattering ◽  
Very High

Site-specific excitation in molecules at very high energies: changes in ionization patterns of 1,1,1-trifluoroethane (CF3CH3)

1984 ◽  
Vol 88 (25) ◽  
pp. 6098-6100 ◽  
Author(s):  
Klaus Mueller-Dethlefs ◽  
Michael Sander ◽  
Leslie A. Chewter ◽  
Edward W. Schlag
Keyword(s):  
Site Specific ◽  
High Energies ◽  
Very High

A setup with a mechanical chopper for monochromating neutrons and shortening a neutron flux from a pulsed neutron source

2006 ◽  
Vol 49 (5) ◽  
pp. 617-623
Author(s):  
Zh. V. Mezentseva ◽  
A. P. Sirotin ◽  
Yu. V. Grigor’ev ◽  
H. Faikov-Stanczyk
Keyword(s):  
Neutron Flux ◽  
Neutron Source ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source ◽  
Mechanical Chopper

scholarly journals Neutron capture data for unstable nuclei – Astrophysical quests and experimental challenges

2019 ◽  
Vol 23 ◽  
pp. 1
Author(s):  
F. Käppeler
Keyword(s):  
Cross Sections ◽  
Reaction Path ◽  
Chemical Elements ◽  
Neutron Sources ◽  
Unstable Nuclei ◽  
Quantitative Studies ◽  
Branching Points ◽  
Supernova Explosions ◽  
R Process ◽  
Pulsed Neutron

The abundances of the chemical elements heavier than iron can be attributed in about equal parts to the r and s processes, which are taking place in supernova explosions and during the He and C burning phases of stellar evolution, respectively. So far, quantitative studies of the r-process are out of reach, because it involves reactions on extremely short-lived neutron-rich nuclei. On the contrary, the situation for the s-process is far advanced, thanks to a comprehensive database of experimental (n,γ) cross sections for most isotopes along the reaction path from 12C to the Pb/Bi region. For the stable isotopes last gaps in the data are presently closed, but further studies are clearly needed to reach the required accuracy and to resolve remaining discrepancies. The quest for cross sections of unstable isotopes remains a persisting challenge though. In particular, nuclei which act as branching points are of prime interest, because they provide key information on the deep stellar interior. While the activation method is limited to a few exceptional branch-point nuclei, successful measurements via the time-of- flight technique are depending on intense pulsed neutron sources and elaborate methods for sample production. Current developments in Europe are providing promising perspectives in both areas.

Sign in / Sign up

Export Citation Format

Share Document