New low mass isotopes of emanation (element 86)

Technical Report · Sun Sep 04 20:00:00 EDT 1949

OSTI ID:5752575

Ghiorso, A; Meinke, W W; Seaborg, G T

Among the spallation products obtained from the 350-MeV proton bombardment of /sup 232/Th we have identified two gaseous alpha emitters which apparently do not decay into any presently known alpha-decay chains. The half-lives observed for the decay of the alpha activities are 23 min and 2.1 hr. These half-lives may be principally determined by an unknown amount of orbital electron capture. At least one alpha-emitting daughter (about 4 hr half-life) has been observed to grow from a gaseous parent, but it has not been determined whether it arises from alpha decay or electron capture.

• Research Organization: California Univ., Berkeley (USA). Lawrence Radiation Lab.
• OSTI ID: 5752575
• Report Number(s): AECU-460; UCRL-438
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
HADRON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
PROTON REACTIONS
SPALLATION
TARGETS
THORIUM 232 TARGET