Total Cross Sections of Heavy Nuclei for Fast Neutrons

1952 ◽  
Vol 88 (1) ◽  
pp. 83-90 ◽  
Author(s):  
D. W. Miller ◽  
R. K. Adair ◽  
C. K. Bockelman ◽  
S. E. Darden
Keyword(s):  
Cross Sections ◽  
Fast Neutrons ◽  
Heavy Nuclei ◽  
Total Cross Sections

Total Cross Sections of Gadolinium for Fast Neutrons

1966 ◽  
Vol 25 (3) ◽  
pp. 291-293 ◽  
Author(s):  
C. J. Wickstrom ◽  
S. B. Potter ◽  
Hans J. Tiller
Keyword(s):  
Cross Sections ◽  
Fast Neutrons ◽  
Total Cross Sections

SHELL EFFECTS ON THE SPACING OF NUCLEAR LEVELS

1956 ◽  
Vol 34 (8) ◽  
pp. 804-829 ◽  
Author(s):  
T. D. Newton
Keyword(s):  
Cross Sections ◽  
Level Density ◽  
Magic Number ◽  
Slow Neutron ◽  
Magic Numbers ◽  
Heavy Nuclei ◽  
Total Cross Sections ◽  
Shell Effects ◽  
Complete Set ◽  
Nuclear Levels

Recent measurements of resonances in slow neutron total cross sections yield good estimates of the average level spacing, D, in medium and heavy nuclei. These spacings show large variations, by factors of 103 to 105, in the region of magic numbers of nucleons. There are also variations by smaller factors between nuclei with even and odd numbers of protons or neutrons. The even–odd effect is a co-operative phenomenon; it can be approximately treated by redefining the ground state to be used for a Fermi gas model. After this correction the gas model should predict D with reasonable accuracy since it is required only to define the density of a complete set of states. The magic number variations are shown to be fitted by an improved approximation to the single-nucleon level density. This is obtained from the observed sequence of single-particle spins and the assumption that the energy interval between spin subshells is constant. Fifty-two observed spacings are fitted by a two-parameter formula with an average uncertainty factor 3. Many of the larger remaining differences between observation and the predictions of the model are qualitatively explicable as expected departures from this uniform spacing hypothesis.

Total cross sections for fast neutrons by a time of flight method

Physica ◽  
1958 ◽  
Vol 24 (1-5) ◽  
pp. 331-342 ◽  
Author(s):  
P. Huijer ◽  
C.C. Jonker ◽  
J. van den Berg ◽  
J. Rethmeier
Keyword(s):  
Cross Sections ◽  
Time Of Flight ◽  
Fast Neutrons ◽  
Total Cross Sections ◽  
Time Of Flight Method

Undergraduate Experiment to Find Nuclear Sizes by Measuring Total Cross Sections for Fast Neutrons

1969 ◽  
Vol 37 (6) ◽  
pp. 649-654 ◽  
Author(s):  
T. C. Minor ◽  
F. D. Martin ◽  
H. E. Montgomery ◽  
L. M. Okun ◽  
J. L. Fowler
Keyword(s):  
Cross Sections ◽  
Fast Neutrons ◽  
Total Cross Sections

Use of a nuclear reactor as a source for studying the structure of the total cross sections of fast neutrons

1969 ◽  
Vol 27 (2) ◽  
pp. 852-853 ◽  
Author(s):  
V. I. Kukhtevich ◽  
O. A. Trykov ◽  
L. A. Trykov ◽  
I. V. Goryachev
Keyword(s):  
Cross Sections ◽  
Nuclear Reactor ◽  
Fast Neutrons ◽  
Total Cross Sections

Total cross sections for fission of heavy nuclei by intermediate-energy protons

2007 ◽  
Vol 71 (6) ◽  
pp. 809-811 ◽  
Author(s):  
A. A. Kotov ◽  
L. A. Vaishnene ◽  
V. G. Vovchenko ◽  
Yu. A. Gavrikov ◽  
V. V. Polyakov ◽  
...  
Keyword(s):  
Cross Sections ◽  
Intermediate Energy ◽  
Heavy Nuclei ◽  
Total Cross Sections
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