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DECAY OF Ne$sup 1$$sup 8$

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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The radioactive nuclide Ne/sup 18/ was produced in the O/sup 16/(He/sup 3/,n)Ne/sup 18/ reaction by 5.2-Mev He/sup 3/ particles from th e NRL 5-Mv Van de Graaff accelerator. The target, CaO on a Pt backing, was about 300 kev thick to the incident beam. The gamma rays following the decay of Ne/sup 18/ were detected by a 3-in. diam by 3-in. NaI(Tl) crystal and a 256-channel pulse-height analyzer. Only one nuclear gamma ray was observed. Its energy, measured with respect to the Na/sup 22/ gamma ray at 1.2736 plus or minus 0.0016 Mev. is 1.041 plus or minus 0.005 Mev. Therefore, this gamma ray is assigned to the 1.04-Mev state of F/sup 18/. This state is considered to be the isobaric spin analog state of the Ne/sup 18/ ground state, and therefore has quantum parameters 0+, T = 1. The branching to this excited state was measured to be 0.07 plus or minus 0.02 (including a calculated contribution of 0.00006 from orbital electron capture), and that to the ground state of F/sup 18/ was measured to be 0.93 plus or minus 0.02 (including a calculatad contribution of 0.0002 from orbital electron capture). The ft values are, respectively, 3030 plus or minus 880 and 1120 plus or minus 70 sec. The half life of Ne/sup 18/ was measured to be 1.46 plus or minus 0.07 sec. (auth)

Research Organization:
U.S. Naval Research Lab., Washington, D.C.
NSA Number:
NSA-15-015087
OSTI ID:
4042756
Journal Information:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 121; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ACTIVATION
ATOMIC MODELS
BRANCHING RATIO
CALCIUM OXIDES
CAPTURE
DECAY
ELECTRONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
FLUORINE 18
GAMMA DETECTION
GAMMA RADIATION
GAMMA SPECTROMETERS
HALF-LIFE
HELIUM 3
INTERNAL CONVERSION
ION BEAMS
ISOSPIN
MEASURED VALUES
MONOCRYSTALS
NEON 18
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
ORBITS
OXYGEN 16
PARITY
PARTICLE MODELS
PHYSICS
PLATINUM
PRODUCTION
PULSE ANALYZERS
RADIOACTIVITY
SCINTILLATION COUNTERS
SODIUM 22
SODIUM IODIDES
SPECTRA
SPIN
STANDARDS
TARGETS
THALLIUM
THICKNESS
VAN DE GRAAFF ACCELERATORS