Spin and Parity Assignment of Neutron Resonances using Gamma-ray Multiplicity

2009 ◽  
Author(s):  
U. Agvaanluvsan ◽  
G. E. Mitchell ◽  
B. Baramsai ◽  
A. Chyzh ◽  
D. Dashdorj ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Parity Assignment

PRODUCTION AND PROPERTIES OF C15

1956 ◽  
Vol 34 (11) ◽  
pp. 1097-1111 ◽  
Author(s):  
R. A. Douglas ◽  
B. R. Gasten ◽  
Ambuj Mukerji
Keyword(s):  
Discharge Tube ◽  
Ground State ◽  
Half Life ◽  
Lower Energy ◽  
Gamma Ray ◽  
Plastic Scintillator ◽  
Branching Ratio ◽  
Parity Assignment ◽  
Energy Component ◽  
Beta Spectrum

Uniform thin C14 targets on 2500 Å nickel backings were prepared in a discharge tube containing acetylene (enriched to 28.8% C14). A NaI (Tl) crystal was used to measure the yield of C15 (2.25 ± 0.05 sec. half life) from C14(d, p)C15 from Ed = 1.3 to 3.0 Mev. A 7.5 ± 1.5 sec. activity was also observed, presumably N16 produced by C14(d, γ)N16. The C15 gamma-ray spectrum indicates only a 5.3-Mev. transition. A plastic scintillator was used to measure the C15 beta spectrum. End-point energies of 9.5 ± 0.3 and 4.5 ± 0.2 Mev. with a branching ratio of 4 to 1 favoring the lower energy component were observed. The results are consistent with a spin and parity assignment of 1/2(+) for the C15 ground state.

On the possible gamma-ray source in Cygnus

1967 ◽  
Vol 31 ◽  
pp. 469-471
Author(s):  
J. G. Duthie ◽  
M. P. Savedoff ◽  
R. Cobb
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Right Ascension

A source of gamma rays has been found at right ascension 20h15m, declination +35°, with an uncertainty of 6° in each coordinate. Its flux is (1·5 ± 0·8) x 10-4photons cm-2sec-1at 100 MeV. Possible identifications are reviewed, but no conclusion is reached. The mechanism producing the radiation is also uncertain.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

Earth escapes gamma-ray disaster

2006 ◽  
Vol 190 ◽  
pp. 12-12
Author(s):  
E SAMUELREICH
Keyword(s):  
Gamma Ray
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