OBSERVATION OF NEUTRON HALOS IN THE EXCITED STATES OF NUCLEI

2011 ◽  
Vol 20 (04) ◽  
pp. 823-826 ◽  
Author(s):  
A. A. OGLOBLIN ◽  
A. N. DANILOV ◽  
A. S. DEMYANOVA ◽  
T. L. BELYAEVA ◽  
S. A. GONCHAROV
Keyword(s):  
Inelastic Scattering ◽  
Excited States ◽  
Cross Sections ◽  
Differential Cross ◽  
Neutron Emission ◽  
Differential Cross Sections ◽  
Rotational Bands

Differential cross-sections of inelastic scattering leading to the excitation of some levels near the thresholds of neutron emission were analyzed. The abnormally large radii were identified for [Formula: see text] (3.09 Mev) state of 13 C , first members of the rotational bands based on the 1/2+ levels of 9 Be (1.68 MeV ) and 11 Be ( gr . st .), [Formula: see text] (1.54 MeV) and [Formula: see text] (2.7 MeV) states of 14 Be and 12 Be correspondingly. All these states can be considered as having neutron halos.

scholarly journals Differential cross sections and collision-induced rotational alignment in inelastic scattering of NO(X) by Xe

2020 ◽  
Vol 33 (2) ◽  
pp. 217-233
Author(s):  
Mark Brouard ◽  
Helen Chadwick ◽  
Sean D. S. Gordon ◽  
Cornelia G. Heid ◽  
Balazs Hornung ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Rotational Alignment ◽  
Differential Cross Sections

Photoneutron Angular Distributions for 4He

1975 ◽  
Vol 53 (8) ◽  
pp. 802-811 ◽  
Author(s):  
J. D. Irish ◽  
R. G. Johnson ◽  
B. L. Berman ◽  
B. J. Thomas ◽  
K. G. McNeill ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Neutron Emission ◽  
P Wave ◽  
Photon Absorption ◽  
Differential Cross Sections ◽  
Excitation Energies ◽  
Legendre Series ◽  
Charge Symmetry ◽  
Channel Spin

Differential cross sections for the reaction 4He(γ, n)3He have been measured at laboratory angles of 53°, 68°, 83°, 98°, 128°, and 143° for excitation energies between 22 and 32 MeV by the photoneutron time of flight technique. The photoneutron spectra were used to obtain the angular distribution coefficients in the Legendre series expansion for the differential photoneutron cross sections. Analysis of these coefficients indicates that the photodisintegration process in this nucleus, while dominated by E1 photon absorption followed by channel spin zero (no spin flip) p wave neutron emission, is affected by E1 channel spin one and E2 contributions. In the higher energy region (E > 27 MeV), the amount of E2 absorption observed was ~6% of the total and is dominated by the channel spin one E2 matrix element. The total cross section obtained from the measured differential cross sections yields a value of σ(γ, p)/σ(γ, n) near unity, in agreement with a calculation of this ratio which requires no charge symmetry breaking component of the nuclear force.

scholarly journals Differential Cross Sections for Neutron Elastic and Inelastic Scattering on23Na

2014 ◽  
Vol 66 ◽  
pp. 03091
Author(s):  
J.R. Vanhoy ◽  
S.F. Hicks ◽  
A. Chakraborty ◽  
B.R. Champine ◽  
B. Combs ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Elastic And Inelastic Scattering

scholarly journals Electron Scattering from the Ground and Excited States of Barium

1999 ◽  
Vol 52 (3) ◽  
pp. 603
Author(s):  
Dmitry V. Fursa
Keyword(s):  
Excited States ◽  
Electron Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Differential Cross Sections ◽  
Close Coupling ◽  
Angular Correlations ◽  
Electron Photon ◽  
Good Agreement

We have used the nonrelativistic convergent close-coupling (CCC) method to investigate electron scattering from the ground (6s2)1S state and excited (6s6p)1 Po1 and (6s5d)1,3De2 states of barium. For the scattering from the barium ground state, we have found very good agreement with measurements of (6s6p)1 Po1 apparent cross sections at all energies. Similarly, good agreement is found for differential cross sections for elastic scattering and (6s6p)1 Po and (6s5d)1 De2 excitations and with the (6s6p)1 Po1 state electron{photon angular correlations. For the scattering from excited states of barium we have found good agreement with elastic (6s6p)1 Po1 scattering and the (6s5d)1De2 → (6s6p)1 Po1 transition for both differential cross sections and electron–photon angular correlations.

Measurement of the Secondary Neutron Emission Differential and Double-Differential Cross Sections between 20 and 30 MeV

2011 ◽  
Vol 59 (2(3)) ◽  
pp. 1729-1732
Author(s):  
X. C. Ruan ◽  
G. C. Chen ◽  
H. X. Huang ◽  
X. Li ◽  
Y. B. Nie ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Neutron Emission ◽  
Differential Cross Sections ◽  
Secondary Neutron
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