High-energy Coulomb breakup of proton-dripline nuclei as a tool to study radiative-capture reactions of astrophysical interest

2007 ◽  
Author(s):  
K. Sümmerer ◽  
Lídia S. Ferreira ◽  
Paramasivan Arumugan ◽  
Keyword(s):  
Radiative Capture ◽  
High Energy ◽  
Coulomb Breakup ◽  
Astrophysical Interest

THREE AND FOUR-BODY BREAKUP REACTIONS

2008 ◽  
Vol 17 (10) ◽  
pp. 2301-2309
Author(s):  
DANIEL BAYE
Keyword(s):  
Halo Nucleus ◽  
Radiative Capture ◽  
Halo Nuclei ◽  
Coulomb Breakup ◽  
First Order ◽  
S Factor ◽  
Reaction Models ◽  
Spectroscopic Information ◽  
Coupled Channel ◽  
First Order Perturbation

Breakup reactions provide spectroscopic information on exotic nuclei. Coulomb breakup indirectly measures the astrophysical S factor for radiative-capture reactions. The validity of first-order perturbation theory is limited for extended systems such as halo nuclei. More elaborate reaction models are necessary: semi-classical time-dependent Schrödinger equation, eikonal and dynamical eikonal approximations, continuum-discretized coupled-channel method. Breakup experiments do not provide much information on the structure of a two-cluster halo nucleus but accurate exclusive experiments should be more interesting for three-cluster nuclei.

Radiative capture of high-energy electrons

1975 ◽  
Vol 12 (5) ◽  
pp. 1825-1829 ◽  
Author(s):  
C. M. Lee ◽  
R. H. Pratt
Keyword(s):  
Radiative Capture ◽  
High Energy ◽  
High Energy Electrons

scholarly journals Mechanism for X-ray production in extars

1970 ◽  
Vol 37 ◽  
pp. 413-423
Author(s):  
O. P. Manley ◽  
S. Olbert
Keyword(s):  
High Energy ◽  
X Rays ◽  
Interested Reader ◽  
High Energy Radiation ◽  
Energy Radiation ◽  
Astrophysical Interest ◽  
X Ray ◽  
Theory Of Production

This presentation attempts to describe in very qualitative terms a theory of production of high energy radiation (soft and hard X-rays) in magnetoactive plasmas of astrophysical interest. Special emphasis has been placed on the application of our model to extars and in particular to Sco X-1. More rigorous arguments may be found elsewhere [1] and the interested reader is urged to consult that reference for more details.

ON THE THEORY OF RADIATIVE CAPTURE OF 1S ORBITAL ELECTRONS

1962 ◽  
Vol 40 (12) ◽  
pp. 1765-1771 ◽  
Author(s):  
Guy Paquette
Keyword(s):  
Radiative Capture ◽  
Electromagnetic Interaction ◽  
Relativistic Effects ◽  
High Energy ◽  
Gamma Spectrum ◽  
High Energy Part ◽  
Energy Part ◽  
Spectrum Intensity ◽  
Retardation Effects ◽  
Nonrelativistic Calculation

A nonrelativistic calculation of the continuous gamma spectrum accompanying the capture of 1S orbital electrons in A37 is presented. The calculation takes into account the retardation effects in treating the electromagnetic interaction. A comparison with the relativistic calculation of Martin and Glauber (1958) shows that relativistic effects and screening corrections do not affect the high-energy part of the gamma spectrum. On the other hand, the retardation effects are important over the whole spectrum, except at the very lowest photon energies. The method employed in the calculation allows one to ascertain the relative importance of various intermediate states in their contribution to the spectrum intensity.

Production of high-energy photons in fast neutron radiative capture

1986 ◽  
Vol 95 (1-4) ◽  
pp. 199-202
Author(s):  
Giuseppe Longo ◽  
Franca Fabbri
Keyword(s):  
Fast Neutron ◽  
Radiative Capture ◽  
High Energy
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