/sup 146/Gd and /sup 144/Sm excited by the (p,t) reaction on radioactive targets

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.97· OSTI ID:5909290

Flynn, E R; van der Plicht, J; Wilhelmy, J B; Mann, L G; Struble, G L; Lanier, R G

The (p,t) reaction has been used to study the closed-shell nuclei /sup 146/Gd and /sup 144/Sm, the former exhibiting some characteristics of a doubly closed shell. Exotic radioactive targets of /sup 148/Gd (t/sub 1/2/ = 75 yr) and /sup 146/Sm (t/sub 1/2/ = 7 x 10/sup 7/ yr) obtained from chemical and isotope separation of irradiated beam-stop material were employed. The ground-state mass excess of /sup 146/Gd was measured as being ..delta..u = -76.083(15) MeV and the first excited state is confirmed as being a 3/sup -/ state at 1.580-MeV excitation energy. Thirteen states were observed in /sup 146/Gd and 23 in /sup 144/Sm. The pairing-monopole and pairing-quadrupole states in both nuclei are observed for the first time. These levels are higher than systematics would predict, confirming a proton-subshell closure in /sup 146/Gd, and are split in /sup 144/Sm, indicating a strong interaction between nuclear modes.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5909290
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
DWBA
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
GADOLINIUM 146
GADOLINIUM 148 TARGET
GADOLINIUM ISOTOPES
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARITY
PARTICLE PROPERTIES
PICKUP REACTIONS
PROTON REACTIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SAMARIUM 144
SAMARIUM 146 TARGET
SAMARIUM ISOTOPES
SHELL MODELS
SPIN
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS
TRITONS