Charge exchange reactions on medium and heavy mass targets at intermediate energies

2019 ◽  
Vol 35 (08) ◽  
pp. 2050045
Author(s):  
Pardeep Singh ◽  
Monika Singh ◽  
Neha Rani
Keyword(s):  
Charge Exchange ◽  
Cross Sections ◽  
Energy Charge ◽  
Impulse Approximation ◽  
Mass Region ◽  
Intermediate Energy ◽  
Exchange Reactions ◽  
Plane Wave Impulse Approximation ◽  
Text Type ◽  
Intermediate Energies

The nuclear isotopic structure can be understood easily via the intermediate-energy charge exchange reactions of (p, n) and [Formula: see text]He, [Formula: see text] type. In the current contribution, we present some results for charge exchange reactions induced by 3He on targets lying in mass region [Formula: see text] within the theoretical framework of plane wave impulse approximation (PWIA) and distorted wave impulse approximation (DWIA). Here, the recoil effects in PWIA have also been considered. Particularly, the angular distributions and the unit cross-sections have been calculated and compared with the available data. Further, the importance of inclusion of the exchange contribution in these reactions is also considered, which eventually enhance the matching with data.

Recent theoretical developments in nuclear charge-exchange reactions

1987 ◽  
Vol 65 (6) ◽  
pp. 614-625 ◽  
Author(s):  
J. Wambach
Keyword(s):  
Charge Exchange ◽  
Cross Sections ◽  
Spin Dynamics ◽  
Random Phase ◽  
Impulse Approximation ◽  
Linear Response Theory ◽  
Exchange Reactions ◽  
Intermediate Energies ◽  
Direct Reactions ◽  
P Type

The (p, n) and (n, p) charge-exchange reactions are a suitable tool in nuclear-structure studies. At intermediate energies, the interaction with the target resembles that between free nucleons, which makes the probes mostly susceptible to the spin dynamics of the nucleus. We review the current theoretical picture of nucleon–nucleus charge-exchange reactions. A brief introduction to the theory of direct reactions in the impulse approximation is given. We then discuss the random-phase approximation (RPA) linear response theory, which is widely used in the calculation of cross sections and related observables. To understand correctly the shape of the continuum cross sections, one needs a more sophisticated theory. We discuss suitable extensions of the RPA that incorporate spreading effects as well as escape effects. Charge-exchange reactions of the (n, p) type have important implications for the evolution of massive stars. The relevance for Type-II supernovae is discussed.

Nucleon charge-exchange reactions at intermediate energies

1987 ◽  
Vol 65 (6) ◽  
pp. 536-548 ◽  
Author(s):  
W. G. Love ◽  
Amir Klein ◽  
M. A. Franey ◽  
K. Nakayama
Keyword(s):  
Charge Exchange ◽  
Random Phase ◽  
Impulse Approximation ◽  
Nucleon Nucleon ◽  
Large Momentum ◽  
Nuclear Excitation ◽  
Exchange Reactions ◽  
Charge Exchange Reaction ◽  
Intermediate Energies ◽  
Nucleon Nucleon Interaction

The nucleon charge–exchange reaction is investigated as a probe of isovector modes of nuclear excitation at both small and large momentum transfer. The calculated and extracted properties of the isovector nucleon–nucleon interaction are discussed and illustrated with an emphasis on incident energies in excess of 100 MeV. Particular emphasis is placed on spin observables and the roles played by different parts of the nucleon–nucleon coupling in their determination. Recent measurements of transverse polarization transfer at 0° in the charge-exchange continuum are compared with distorted wave impulse approximation calculations using random–phase approximation transition densities.

HIGH-RESOLUTION SPECTROSCOPY USING RI-BEAMS – SHARAQ PROJECT

2009 ◽  
Vol 18 (10) ◽  
pp. 2011-2014
Author(s):  
SUSUMU SHIMOURA
Keyword(s):  
High Resolution ◽  
Charge Exchange ◽  
Present Status ◽  
Energy Charge ◽  
Intermediate Energy ◽  
Beam Line ◽  
Nuclear Spectroscopy ◽  
High Resolution Spectroscopy ◽  
Exchange Reactions

The SHARAQ project is presented along high-resolution nuclear spectroscopy using RI beams, where the characteristics of intermediate-energy charge exchange reactions of RI beams are discussed. The present status of construction of the SHARAQ spectrometer and the high-resolution beam line is presented.

Coherent pion production in intermediate energy charge-exchange reactions

1993 ◽  
Vol 299 (3-4) ◽  
pp. 194-198 ◽  
Author(s):  
P. Oltmanns ◽  
F. Osterfeld ◽  
T. Udagawa
Keyword(s):  
Charge Exchange ◽  
Pion Production ◽  
Energy Charge ◽  
Intermediate Energy ◽  
Exchange Reactions

scholarly journals Charge Exchange Cross Sections for Noble Gas Ions and N2 between 0.2 and 5.0 keV

Atoms ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 96
Author(s):  
Steven Bromley ◽  
Corey Ahl ◽  
Chad Sosolik ◽  
Joan Marler
Keyword(s):  
Charge Exchange ◽  
Cross Sections ◽  
Neutral Atom ◽  
Mechanical Design ◽  
Noble Gas ◽  
Dominant Role ◽  
Intermediate Energy ◽  
Fundamental Interaction ◽  
Gas Cell ◽  
Astrophysical Plasmas

Charge transfer of an electron from a neutral atom to an ion is a fundamental interaction that plays a dominant role in the energy balance of atmospheric and astrophysical plasmas. The present investigation measured the charge exchange cross sections of noble gas ions (He + , Ne + , Ar + , Kr + ) with N 2 in the intermediate energy range 0.2–5.0 keV. The systems were chosen because there remains a lack of consensus amongst previous measurements and regions where there were no previous measurements. A description of the mechanical design for an electrically floated gas cell is described herein.

scholarly journals Charge Exchange Reactions in Astrophysical Plasmas

1983 ◽  
Vol 103 ◽  
pp. 187-197
Author(s):  
R. McCarroll ◽  
P. Valiron ◽  
L. Opradolce
Keyword(s):  
Charge Exchange ◽  
Cross Sections ◽  
Molecular Model ◽  
Recent Experimental Data ◽  
Exchange Reactions ◽  
Astrophysical Plasmas ◽  
Atomic Collisions ◽  
Physical Conditions ◽  
Theoretical Approaches ◽  
Basic Features

A review is presented of charge exchange reactions of multiply charged ions with atomic hydrogen and helium at thermal-eV energies, typical of the physical conditions encountered in planetary nebulae. The basic features of the processes are analyzed in the framework of the molecular model of atomic collisions. A discussion is given of the different theoretical approaches to the calculation of the collision cross sections. A comparison with recent experimental data is included.

TO SEARCH FOR THE EXOTIC TENSOR MESON IN THE ρ+ρ+ AND ρ−ρ− CHANNELS IN HADRON COLLISIONS AT INTERMEDIATE ENERGIES

1992 ◽  
Vol 07 (18) ◽  
pp. 4313-4333 ◽  
Author(s):  
N.N. ACHASOV ◽  
G.N. SHESTAKOV
Keyword(s):  
Cross Sections ◽  
Central Region ◽  
Meson Production ◽  
Pion Exchange ◽  
Exchange Reactions ◽  
Resonance States ◽  
Tensor Meson ◽  
Intermediate Energies ◽  
The Cross

It is shown that reactions with one-pion exchange, reactions of meson production in the central region and reactions of nucleon-antinucleon annihilation can be good laboratories to search, in the ρ+ρ+ and ρ−ρ−channels, for the exotic resonance states E++ and E−− with IG(JP)=2+(2+), the signs of the neutral partner of which were discovered probably in the reactions γγ→ρρ. Detailed estimates are presented for the cross sections of the reactions π+p→E++n→ρ+ρ+n, π−ρ→E−−Δ++→ρ−ρ−∆++, ρρ→n(E++)n→n(ρ+ρ+)n and similar ones at intermediate energies.

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