Decays of /sup 22/Al and /sup 26/P: discovery of beta-delayed two-proton radioactivity
A helium-jet system and the /sup 24/Mg(/sup 3/He,p4n)/sup 22/Al and /sup 28/Si(/sup 3/He,p4n)/sup 26/P reactions have been used to discover the only known odd-odd, T/sub Z/ = -2 nuclides, /sup 22/Al(t/sub 1/2/ approx. 70ms) and /sup 26/P(t/sub 1/2/ approx. 20 ms). Observations of beta-delayed protons from each isotope (laboratory energies 7.839 +- 0.015 MeV and 8.149 +- 0.021 MeV for /sup 22/Al and 7.269 +- 0.015 MeV and 6.827 +- 0.050 MeV for /sup 26/P) established the existence of these nuclides and provided a measurement of the mass excesses of the lowest T = 2 states in their beta decay daughters, /sup 22/Mg and /sup 26/Si (13.650 +- 0.015 MeV and 5.936 +- 0.015 MeV, respectively). Measurement of these masses confirmed that these T = 2 states were unbound to two-proton emission as had been predicted theoretically.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6412513
- Report Number(s):
- LBL-15742; ON: DE83009955
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Thesis
- Country of Publication:
- United States
- Language:
- English
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Beta-delayed proton decay of an odd-odd T/sub z/ = -2 isotope, /sup 22/Al
Discovery of beta-delayed two-proton radioactivity in /sup 22/Al and /sup 26/P
Related Subjects
ALUMINIUM 22
BETA DECAY
DELAYED PROTONS
PHOSPHORUS 26
COINCIDENCE METHODS
DELAYED PROTON PRECURSORS
ENERGY LEVELS
EXPERIMENTAL DATA
HALF-LIFE
MAGNESIUM 22
MAGNESIUM 24
MASS DEFECT
NEON 20
PROTON SPECTRA
SILICON 26
TELESCOPE COUNTERS
ALKALINE EARTH ISOTOPES
ALUMINIUM ISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COUNTING TECHNIQUES
DATA
DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM ISOTOPES
NEON ISOTOPES
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
PHOSPHORUS ISOTOPES
PROTONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SILICON ISOTOPES
SPECTRA
STABLE ISOTOPES
651422* - Nuclear Properties & Reactions
A=20-38
Experimental- Radioactive Decay- (-1987)