THE NEUTRON YIELD FROM HEAVY ICE TARGETS BOMBARDED WITH PROTONS BELOW THE D(p, n)2p THRESHOLD

1959 ◽  
Vol 37 (7) ◽  
pp. 866-873
Author(s):  
P. P. Singh ◽  
G. M. Griffiths ◽  
Y. I. Ssu ◽  
J. B. Warren
Keyword(s):  
Angular Distribution ◽  
Excitation Function ◽  
Neutron Yield ◽  
Gamma Ray ◽  
Theoretical Calculations ◽  
Secondary Reaction

In connection with some experiments on the gamma-ray yield from the D(p, γ)He3 reaction using heavy ice targets a considerable yield of neutrons was found even for proton bombarding energies well below the D(p, n)2p threshold of 3.3 Mev. The yield, excitation function, and angular distribution of this neutron yield have been investigated both experimentally and by means of theoretical calculations. These studies confirm the suggestion that the neutrons are produced by a secondary reaction in which deuterons, scattered in the target by incident protons, collide with further target deuterons to produce D(d, n)He3 reactions.

Investigation of level properties of 139La

1979 ◽  
Vol 57 (11) ◽  
pp. 1940-1948 ◽  
Author(s):  
R. G. Kulkarni ◽  
K. Andhradev
Keyword(s):  
Angular Distribution ◽  
Excited States ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Theoretical Calculations ◽  
Angular Distributions

The excited states of 139La up to 1800 keV were studied by means of Coulomb excitation of 139La with protons varying in energy from 4.0 to 5.5 eV. The gamma-ray yields and angular distributions were measured with a Ge(Li) detector. The levels at 1715.0 and 1767.2 keV were Coulomb excited newly. The results of gamma-ray angular distribution measurements establish spin values of 3/2+, 9/2+, 7/2+, 5/2+, and 3/2+ for the 830, 1219.1, 1536.3, 1715.0, and 1767.2 keV levels, respectively. The reduced E2 and M1 transition probabilities were obtained for 11 transitions. The results were compared with the available theoretical calculations.

scholarly journals Studying collective nuclear excitations with fast neutrons: a comparison of 76Ge and 76Se

2018 ◽  
Vol 178 ◽  
pp. 02008
Author(s):  
Steven W. Yates ◽  
Sharmistha Mukhopadhyay ◽  
Benjamin P. Crider ◽  
Erin E. Peters
Keyword(s):  
Angular Distribution ◽  
Excitation Function ◽  
Gamma Ray ◽  
Fast Neutrons ◽  
Band Structures ◽  
Mixing Ratios ◽  
Spin Level ◽  
Γ Ray ◽  
Nuclear Excitations

The low-lying, low-spin level structures of 76Ge and 76Se were studied with the (n,n'γ) reaction. Gamma-ray excitation function and angular distribution measurements were performed, and level spins, level lifetimes, γ-ray intensities, and multipole mixing ratios were determined. Large observed B(E2) values support the identification of low-lying band structures.

scholarly journals Confining the angular distribution of terrestrial gamma ray flash emission

2011 ◽  
Vol 116 (A11) ◽  
pp. n/a-n/a ◽  
Author(s):  
T. Gjesteland ◽  
N. Østgaard ◽  
A. B. Collier ◽  
B. E. Carlson ◽  
M. B. Cohen ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Gamma Ray

Gamma-Ray Angular Distribution in Coulomb Excitation

1956 ◽  
Vol 101 (5) ◽  
pp. 1504-1507 ◽  
Author(s):  
G. Breit ◽  
M. E. Ebel ◽  
J. E. Russell
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Coulomb Excitation

Nonequilibrium effects in α-particle-induced reactions in Cs and I

2000 ◽  
Vol 78 (2) ◽  
pp. 133-139 ◽  
Author(s):  
M K Bhardwaj ◽  
I A Rizvi ◽  
A K Chaubey
Keyword(s):  
Cross Sections ◽  
Gamma Ray ◽  
Theoretical Calculations ◽  
High Energy ◽  
Particle Energy ◽  
Substantial Contribution ◽  
Equilibrium Geometry ◽  
Activation Technique ◽  
Excitation Functions ◽  
Stacked Foil Activation Technique

The excitation functions for the reactions 127I(α,n)130Cs, 127I(α,2n)129Cs, 127I(α,4n)127Cs, 133Cs(α,2n)135La, and 133Cs(α,4n)133La have been measured up to 50 MeV alpha-particle energy using the stacked-foil activation technique and Ge(Li) gamma-ray spectroscopy. The measured cross sections were compared with theoretical calculations considering equilibrium as well as the pre-equilibrium geometry-dependent hybrid models of Blann. The high-energy tails of the excitation functions show a substantial contribution from pre-equilibrium emission. A general agreement is observed between the experimental results and theoretical predictions with an initial exciton configuration n0 = 4(2n + 2p + 0h).PACS No. 25.40-h

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