Assertion: fermium's isotope | /r/HasProperty | produced
Facets:
value: from bombarding curium-248
type: OTHER
value: mostly
type: DEGREE
value: by bombarding actinide targets
type: MANNER
value: from thallium
type: LOCATION
value: from mercury
type: OTHER
value: from lead
type: OTHER
value: from bismuth impurities
type: OTHER
value: by bombarding either einsteinium-253
type: MANNER
value: by combining 17 neutrons with uranium-238
type: MANNER
value: typically
type: DEGREE
Source sentences:
text: The isotope they discovered, fermium-255, has a half-life of about 20 hours and was produced by combining 17 neutrons with uranium-238, which then underwent eight beta decays.
text: Three californium isotopes with significant half-lives are produced, requiring a total of 15 neutron captures by uranium-238 without nuclear fission or alpha decay occurring during the process.
text: Typically, the most commonly used isotope 256Md is produced by bombarding either einsteinium-253 or -254 with alpha particles: einsteinium-254 is preferred when available because it has a longer half-life and therefore can be used as a target for longer.
text: research isotope 245Cm can be obtained from the α-decay of 249Cf, and the latter isotope is produced in minute quantities from the β−-decay of the berkelium isotope 249Bk.
text: While later 1958 experiments noted that new isotopes could be produced from mercury, thallium, lead, or bismuth impurities, the scientists still stood by their conclusion that element 102 could be produced from this reaction, mentioning a half-life of under 30 seconds and a decay energy of (8.8 ± 0.5)
text: The isotopes of nobelium are mostly produced by bombarding actinide targets (uranium, plutonium, curium, californium, or einsteinium), with the exception of nobelium-262, which is produced as the daughter of lawrencium-262.
text: The most commonly used isotope, 255No, can be produced from bombarding curium-248 or californium-249 with carbon-12: the latter method is more common.