Observation of novel radioactive decay by spontaneous emission of complex nuclei
Two years of experimental investigation on the subject of spontaneous emission of intermediate-mass fragments is described in this manuscript. A short introduction on this subject and a historical review are presented in chapter 1. In chapter 2, the author describe the experimental methods which led to the observation of /sup 14/C emission in polycarbonate etched-track detectors from the isotopes /sup 222/Ra, /sup 223/Ra, /sup 224/Ra and /sup 226/Ra at the branching ratios with respect to ..cap alpha..-decay of (3.7 +/- 0.6) x 10/sup -10/, (6.1 +/- 1.0) x 10/sup -10/, (4.3 +/- 1.2) x 10/sup -10/ and (2.9 +/- 1.0) x 10/sup -11/ respectively. Branching ratio limits for heavy-ion emission from /sup 221/Fr, /sup 221/Ra and /sup 225/Ac were determined to be at < 5.0 x 10/sup -14/, < 1.2 x 10/sup -13/ and < 4.0 x 10/sup -13/ respectively for the 90% C.L. The emission of /sup 24/Ne from /sup 232/U at a branching ratio of (2.0 +/- 0.5) x 10/sup -12/ has been discovered using polyethylene terephthalate etched-track plastics. A confirmation of /sup 24/Ne and/or /sup 25/Ne emission from /sup 233/U at a branching ratio of (5.3 +/- 2.3) x 10/sup -13/ is also reported. In chapter 3, three models of intermediate-mass decay are discussed-the analytic superasymmetric fission model, the model by Shi and Swiatecki, and a model based on a square-well + Coulomb potential.
- Research Organization:
- California Univ., Berkeley (USA)
- OSTI ID:
- 5772870
- Resource Relation:
- Other Information: Thesis (Ph.D)
- Country of Publication:
- United States
- Language:
- English
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ACTINIUM 225
DECAY
FRANCIUM 221
RADIUM 222
RADIUM 223
RADIUM 224
RADIUM 225
RADIUM 226
URANIUM 232
URANIUM 233
BRANCHING RATIO
CARBON 14
EXPERIMENTAL DATA
NEON 24
NEON 25
NUCLEAR FRAGMENTS
NUCLEAR MODELS
Q-VALUE
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIUM ISOTOPES
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
ENERGY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FRANCIUM ISOTOPES
HEAVY NUCLEI
INFORMATION
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
NEON ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
RADIOISOTOPES
RADIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
652020* - Nuclear Properties & Reactions
A=220 & above
Experimental