Angular Distribution of 12- and 16-Mev Gamma Rays from the Proton Bombardment of a Thin Boron Target

1954 ◽  
Vol 96 (5) ◽  
pp. 1337-1339 ◽  
Author(s):  
H. H. Givin ◽  
G. K. Farney ◽  
T. M. Hahn ◽  
B. D. Kern
1956 ◽  
Vol 34 (4) ◽  
pp. 381-388 ◽  
Author(s):  
G. B. Chadwick ◽  
T. K. Alexander ◽  
J. B. Warren

The gamma rays resulting from the bombardment of B10 with protons of energies from 0.5 to 2.0 Mev. have been observed with a sodium iodide scintillation counter. Capture radiation, of energy[Formula: see text]showed a broad resonance at Ep = 1135 ± 15 kev. At this energy, the radiation had an angular distribution of the form 1 + (0.50 ± 0.05)cos2θ and a total cross section (3.5 ± 1.0)10−30 cm.2 Several lower energy radiations were also observed and assigned tentatively to cascade transitions in C11.The cross section for the 430 kev. radiation from the reaction B10(p, αγ)Be7 was found to be 0.21 ± 0.05 barn at Ep = 1.52 Mev. This radiation was found to be isotropic.


1953 ◽  
Vol 91 (4) ◽  
pp. 915-917 ◽  
Author(s):  
G. L. Jenkins ◽  
L. W. Cochran ◽  
B. D. Kern ◽  
T. M. Hahn

1966 ◽  
Vol 147 (1) ◽  
pp. 280-287 ◽  
Author(s):  
J. G. Dardis ◽  
N. E. Scofield

1958 ◽  
Vol 36 (11) ◽  
pp. 1483-1486 ◽  
Author(s):  
Carl Dahlstrom ◽  
J. S. Foster ◽  
A. L. Thompson

The neutron-deficient isotope Pr137 has been discovered by proton bombardment of natural cerium, chemical separation, and mass determination. Its half-life is 1.5 ± 0.1 hours and the end point of its positron spectrum is 1.7 ± 0.1 Mev. No gamma rays were observed.


1937 ◽  
Vol 51 (9) ◽  
pp. 691-698 ◽  
Author(s):  
R. G. Herb ◽  
D. W. Kerst ◽  
J. L. McKibben

1938 ◽  
Vol 54 (6) ◽  
pp. 398-408 ◽  
Author(s):  
E. J. Bernet ◽  
R. G. Herb ◽  
D. B. Parkinson

2009 ◽  
Vol 67 (12) ◽  
pp. 2083-2087 ◽  
Author(s):  
A. Kahraman ◽  
E.N. Ozmutlu ◽  
O. Gurler ◽  
S. Yalcin ◽  
G. Kaynak ◽  
...  

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