Double differential cross sections for neutron emission induced by 256 MeV and 800 MeV protons

1993 ◽  
Vol 47 (4) ◽  
pp. 1647-1658 ◽  
Author(s):  
S. Stamer ◽  
W. Scobel ◽  
W. B. Amian ◽  
R. C. Byrd ◽  
R. C. Haight ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Neutron Emission ◽  
Differential Cross Sections ◽  
Mev Protons

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.

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

Polarizations and Differential Cross Sections for the Elastic Scattering of 40-MeV Protons fromC12,Ca40,Ni58,Zr90, andPb208

1966 ◽  
Vol 147 (3) ◽  
pp. 812-825 ◽  
Author(s):  
L. N. Blumberg ◽  
E. E. Gross ◽  
A. VAN DER Woude ◽  
A. Zucker ◽  
R. H. Bassel
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Mev Protons

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.

Measurement of the ratio of differential cross sections for double and single ionization of He by (4–10)-MeV protons

1998 ◽  
Vol 57 (1) ◽  
pp. 292-296 ◽  
Author(s):  
W. R. DeHaven ◽  
C. Dilley ◽  
A. Landers ◽  
E. Y. Kamber ◽  
C. L. Cocke
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Single Ionization ◽  
Mev Protons
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