High-resolution observations of gamma-ray line emission from SN 1987A

1988 ◽  
Author(s):  
W. G. Sandie ◽  
G. H. Nakano ◽  
L. F. Chase ◽  
G. J. Fishman ◽  
C. A. Meegan ◽  
...  
Keyword(s):  
High Resolution ◽  
Gamma Ray ◽  
Line Emission ◽  
Sn 1987A

High-resolution observations of gamma-ray line emission from SN 1987A

1988 ◽  
Vol 334 ◽  
pp. L91 ◽  
Author(s):  
W. G. Sandie ◽  
G. H. Nakano ◽  
L. F., Jr. Chase ◽  
G. J. Fishman ◽  
C. A. Meegan ◽  
...  
Keyword(s):  
High Resolution ◽  
Gamma Ray ◽  
Line Emission ◽  
Sn 1987A

High Resolution Observations of Gamma-Ray Line Profiles from SN 1987A

Supernovae ◽  
1991 ◽  
pp. 278-282 ◽  
Author(s):  
J. Tueller ◽  
S. Barthelmy ◽  
N. Gehrels ◽  
M. Leventhal ◽  
C. J. MacCallum ◽  
...  
Keyword(s):  
High Resolution ◽  
Gamma Ray ◽  
Line Profiles ◽  
Sn 1987A

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

THE DECAY OF Pm149

1960 ◽  
Vol 38 (12) ◽  
pp. 1577-1585 ◽  
Author(s):  
Agda Artna ◽  
Margaret E. Law
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Conversion Coefficient ◽  
Beta Spectrum ◽  
Multichannel Analyzer ◽  
Coincidence Spectrometer ◽  
Beta Spectrometer ◽  
Beta Group

The 52.8-hour activity of Pm149 has been investigated using a high resolution beta spectrometer, a lens type coincidence spectrometer, and a scintillation spectrometer in conjunction with a multichannel analyzer. The beta spectrum was found to consist of two groups with maximum energies of 1.072 ± 0.002 Mev and 0.786 ± 0.004 Mev, and intensities of 97.1 ± 0.4% and 2.9 ± 0.4% respectively. A gamma ray of energy 285.7 ± 0.3 kev was found to be in coincidence with the 0.786-Mev beta group. No other gamma rays with intensities greater than 0.1% were found. The K conversion coefficient for the 286-kev transition was measured to be 0.075 ± 0.008. This together with the values of 6.5 ± 0.7 and 4 ± 1 obtained for the K/L and L/M conversion ratios respectively indicate that this transition is M1 in character with less than 10% E2 admixture.

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