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Nuclear facts about U-235
#1
Natural Uranium contains about 0.72% of U-235 isotope.
Its half-life is 7.038E+8 years.

Some significant facts about U-235 decay:
Decay mode: alpha (100%), Q-value=4678.7 keV
Gamma rays: 185.712 keV (57.2%), 143.764 keV (10.96%), 163.358 keV (5.08%), 205.309 keV (5.01%), ...
X-rays: 12.968 keV (15%), 93.35 keV (11%), 89.957 keV (6%), 15.605 keV (3.8%), ...
Alpha rays: 4397.8 keV (55.0%), 4366.1 keV (17%), 4214.7 keV (5.7), 4596.4 keV (5%), ...
Spontaneous Fission: 7.0E-9%
Decay heat: 5.994E-8 W/g

http://nucleardata.nuclear.lu.se/toi/nuc...iZA=920235
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