Decay of neutron-rich /sup 45/Ar and /sup 46/Ar

Journal Article · Thu Jun 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.17.2197· OSTI ID:6726706

Petry, R F; Shirk, D G; Hill, J C; Wang, K H

The decay of /sup 45/Ar and the previously unreported decay of /sup 46/Ar have been studied from sources prepared in the /sup 48/Ca(n, 2p,2n)/sup 45/Ar and /sup 48/Ca(n,2pn)/sup 46/Ar reactions. The half-lives of /sup 45/Ar and /sup 46/Ar were measured to be 20.8 and 8.9 sec, respectively. On the basis of results from ..gamma.. spectroscopy levels in /sup 45/K and /sup 46/K are determined. Of 14 ..gamma.. rays observed in the decay of /sup 45/Ar, 13 are placed in a /sup 45/K level scheme. The only ..gamma.. ray observed in /sup 46/Ar decay is one from a 1/sup +/ core state in /sup 46/K at 1944 keV. The systematics of K nuclei are discussed.The /sup 2/0Ne(/sup 3/He, /sup 8/Li) reaction has been used to study the particle-unstable nucleus /sup 15/F. The ground state of /sup 15/F is observed as a broad peak at a mass excess of 16.9 +- 0.2 MeV with a width greater than 900 keV. A well defined narrower peak is observed at a mass excess of 18.088 +- 0.025 MeV and with a width of 240 +- 30 keV. It is shown to be the mirror of the 5/2/sup +/ first excited state of /sup 15/C. The analog of the 5/2/sup +/ state was observed in /sup 15/O at E/sub x/ = 12.255 +- 0.013 MeV. This state is shown to proton decay to the T = 1 first excited state of /sup 14/N and to have a width of 135 +- 15 keV.

• Research Organization: Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73069
• OSTI ID: 6726706
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 17:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ANGULAR DISTRIBUTION
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 15
CARBON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DECAY
DIRECT REACTIONS
DISTRIBUTION
ENERGY
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
FLUORINE 15
FLUORINE ISOTOPES
GROUND STATES
HADRON REACTIONS
HELIUM 3 REACTIONS
ISOBARIC ANALOGS
ISOTOPES
LIGHT NUCLEI
LITHIUM 8
LITHIUM ISOTOPES
MASS DEFECT
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
MIRROR NUCLEI
MULTI-NUCLEON TRANSFER REACTIONS
NEON 20 TARGET
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN 15
OXYGEN 17 TARGET
OXYGEN ISOTOPES
PROTON REACTIONS
Q-VALUE
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
TARGETS
TRANSFER REACTIONS
TRITONS
TWO-NUCLEON TRANSFER REACTIONS